√(81+18√(7)+7)
(not decimal form)
Answers
Answer:
\(\huge\boxed{\sqrt{81+18\sqrt7+7}=9+\sqrt7}\)
Step-by-step explanation:
\(\sqrt{81+18\sqrt7+7}=(*)\\\\81=9^2\\7=(\sqrt7)^2\\18\sqrt7=(2)(9)(\sqrt7)\\\\(*)=\sqrt{9^2+(2)(9)(\sqrt7)+(\sqrt7)^2}\\\\\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\=\sqrt{(9+\sqrt7)^2}\\\\\text{use}\ \sqrt{a^2}=|a|\\\\=|9+\sqrt7|=9+\sqrt7\)
Related Questions
ANSWER ASAP BEFORE CLASS ENDS 50 POINTS !!!
Answers
Answer:
30 to 100
Step-by-step explanation:
cus when y increases 30, x increases 100
because when y increases by 30 x increases by 100
x-12-23+7.5=1 ; what is the value of x?
Answers
Answer:
X=28.5
Step-by-step explanation:
Hope this helps!
Answer:
x=28.5
Step-by-step explanation:
x=1+12+23-7,5
x=13+23-7,5
x=36-7,5
x=28,5
:))
The volume of a sphere is V = 4/3πr³ and the relationship between
the radius r and the diameter d is r = d/2.
Find the volume of the sphere in terms of the diameter d and simplify the expressions.
b. What is the volume of the sphere when the diameter is 2/3 centimeter?
Answers
i need help with this question please help me
Answers
Answer:
The answer is D.
Step-by-step explanation:
y = mx + b
C = 5/9 (F - 32)
C = 5/9F - 5/9 (32)
Option (D) is correct.
Help math pls its a drag and drop
Answers
B goes in stock price increased
C goes in stock price remained constant
D goes in stock price decreased
E goes is stock price increased
Hope this helps!
B. the stock increased
C. the stock stayed constant
D. the stock Decreased
E. the stock increased
I LOVE ANIME BOYS
Melissa can buy an 8 pound bag of dog food for $7.20. Which bag has an equivalent cost?
Answers
Dixon kept record of the temperature for 5 days. He recorded these numbers : -1.1 c, 3.5 c, -4.4 c, -0.5 c, 2.7 c. What was the average of the temperatures Dixon recorded?
A. -0.2 c
B. -0.04 c
C. 0.04 c
D. 0.2 c
Answers
Answer:
a
Step-by-step explanation:
the sum of all numbers is -9.7 so I divide by -9.7 by 5
Explanation:
I just did this one
NO BOTS NO BOTS NO BOTS
Answers
Answer:
25!
Step-by-step explanation:
5x5=25.
25x2=50
Again 5x5 is 25 so subtract that:
50-25=25.
Therefore the answer is 25.
Hope this helps! Brainliest would be appreciated! Thank you!
Does anyone have the answer key to "Understand Systems of Linear Equations I-ready level H instruction?"
Answers
Answer:
no bro, sorry. even though I needed to I don't have it
To celebrate ratios, Mrs. Johnson’s class will make pizzas. Julio is in charge of bringing in the sauce. There are 30 students in his class and each pizza serves 8.
Pizza Sauce Recipe
Pizzas
Pizza Sauce
1
One-third cup
2
3
4
On a coordinate plane, a graph titled Pizza Recipe has Pizzas on the x-axis and Cups of Pizza Sauce on the y-axis. Point A is (3, 2), point B is (4, 2.6), point C is (4.5, 3), point D is (6, 4).
Which point should Julio use to determine the amount of pizza sauce he needs to bring?
A
B
C
D
Answers
Answer:
D
Step-by-step explanation:
*see picture for explanation
this is a rough calculation
I don't have time to thoroughly check if the answer is right
The answer is B
Step-by-step explanation: I just did the quiz
What is the y-intercept, end behavior and zeros of this polynomial function?
g(x) = (x + 2)(x − 1)(x − 2).
Describe the direction of the parabola and determine the zeros and y-intercept.
f(x) = (x – 3)(x – 2).
WILL MARK BRAINLIEST IF BOTH ANSWERS ARE CORRECT
Answers
Answer:
To determine its end behavior, look at the leading term of the polynomial function. Because the power of the leading term is the highest, that term will grow significantly faster than the other terms as x gets very large or very small, so its behavior will dominate the graph.
Step-by-step explanation:
mark it as brainlist
For the first one:
Y int- (0,4)
Find the zeros- x= -2, 1, 2
Second one:
Find the zeros- x= 3,2
Y int- (0,6)
(First pic is end behavior for g(x)=(x+2)(x-1)(x-2)….. second pic is direction of parabola for f(x)=(x-3)(x-2) hope this helped :)
An alloy is composed of nickel, zinc, and copper in a 5:4:8 ratio. How many kilograms of each metal are needed to make 3.4 kg of this alloy?
Answers
Answer:
5x+4x+8x=3.4
17x=3.4
x=0.2
Nickel 1 kg
Zinc 0.8 kg
Copper 1.6 kg
Answer:
1kg of nickel, 0.8kg of zinc, and 1.6kg of copper
Step-by-step explanation:
thank me later
is 2/3 rational number
Answers
Answer:
yes
Step-by-step explanation:
because it is a fraction and is positivee
Answer:
A rational number is any integer, fraction, terminating decimal, or repeating decimal.
Your Answer: Rational
Step-by-step explanation:
Hope this helps : )
Mary and Jim collect baseball cards. Mary has five more than three times as many cards as Jim. The total number of cards they both have is 147. How many cards do they each have?
Please give me a right answer I will give 100 pt and brainliest
Answers
Answer:
m = 111.5
j = 35.5
I really hope this is right ;(
Step-by-step explanation:
m = 3j + 5
j + 3j + 5 = 147
4j + 5 = 147
4j = 142
142 ÷ 4 = 35.5
So j = 35.5
3(35.5) + 5 = 111.5
Of the 120 math tests, 47 were Bs. What percent of the math tests were Bs? Round to the nearest whole percent.
Answers
Hill
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LC33011
Question 13 of 34 ✓
Question 15
Identify the ordered pair that nameş point A.
-2
D
C
-1
2
Next Question
1
O
-1
-2
y
A
1
O A) (0.5, -1.5)
O B) (-1.5, 0.5)
O c) (-0.5, -1.5)
OD) (0.5, 1.5)
Answers
Two fish tanks are shown below, one in the shape of a right rectangular prism and one in the shape of a right pentagonal prism. (The base of the right pentagonal prism is a regular pentagon, where all five sides have the same length.)
a.
tank holds the most water. (right rectangular prism or right pentagonal prism)
It holds
in3 more water than the other tank. (use mixed number or decimal as your answer)
b. If both fish tanks have tops, the
tank has the larger surface area. (right rectangular prism or right pentagonal prism)
Answers
Answers:
a. The pentagonal prism tank holds 151.2 in^3 more than the rectangular prism tank
b. The rectangular prism tank would have a larger surface area, if it had a top.
Step by Step:
check image
Exploring Square Roots and Rational Numbers ( PLEASE HELP )
Answers
Answer:
(To simplify the answers, I will refer to the first sentence of the question as part A and the second sentence as part B.)
Question 17
Part A: the square root is between 6 and 7
Part B: the square root is 6.5
Question 18
Part A: the square root is between 9 and 10
Part B: the square root is 9.4
(Extra: the answer in simplified radical form is 2√22)
Question 19
Part A: the square root is between 7 and 8
Part B: the square root is 7.9
(Extra: the answer in simplified radical form is 3√7)
Question 20
Part A: the square root is between 8 and 9
Part B: the square root is 8.7
(Extra: the answer in simplified radical form is 5√3)
Question 21
Part A: the square root is between 5 and 6
Part B: the square root is 5.5
Question 22
Part A: the square root is between 9 and 10.
Part B: the square root is 9.8
Step-by-step explanation:
First of all, it says you can use a calculator! If you do not know how to, let me know in the comments and I can try to help you out! Read the explanation to understand how to do this.
Question 17
Using a calculator, you get 6.48074069… for your decimal.
Rounding it to the nearest tenth, your answer would be 6.5
Now, to find the two consecutive whole numbers the square root is between…
However, there is another way to do this. Remember that 7x7=49. We know that 49 is greater than 42, so let’s see try out a number smaller than 7! 6x6=36. 42 is between 36 and 49, so the square root is between 6 and 7.
Another way to do this is… we know that the decimal is about 6.5, which is between 6 and 7, since those are the two whole numbers before and after that decimal!
Question 18
Using a calculator, you get 9.380833151… for your decimal.
This rounds to 9.4
The whole numbers surrounding this decimal are 9 and 10.
You can also do this by knowing that 9x9, or 9^2, is 81 and 10x10, or 10^2, is 100, and those are the numbers surround 88.
In non-decimal form (simplified radical), your answer can be 2√22.
Question 19
Using a calculator, you get 7.93725393… for your decimal.
This rounds to 7.9
The whole numbers surrounding this decimal are 7 and 8.
You can also do this by knowing that 7x7, or 7^2, is 49 and 8x8, or 8^2, is 64, and those are the numbers surround 63.
In non-decimal form (simplified radical), your answer can be 3√7.
Question 20
Using a calculator, you get 8.66025403… for your decimal.
This rounds to 8.7
The whole numbers surrounding this decimal are 8 and 9.
You can also do this by knowing that 8x8, or 8^2, is 64 and 9x9, or 9^2, is 81, and those are the numbers surround 75.
In non-decimal form (simplified radical), your answer can be 5√3.
Question 21
Using a calculator, you get 5.47722557… for your decimal.
This rounds to 5.5
The whole numbers surrounding this decimal are 5 and 6.
You can also do this by knowing that 5x5, or 5^2, is 25 and 6x6, or 6^2, is 36, and those are the numbers surround 30.
Question 22
Using a calculator, you get 9.84885780… for your decimal.
This rounds to 9.8
The whole numbers surrounding this decimal are 9 and 10.
You can also do this by knowing that 9x9, or 9^2, is 81 and 10x10, or 10^2, is 100, and those are the numbers surround 97.
Note: the symbol "^" means that the number following that symbol is an exponent. So 2^2 is 2 squared, \(2^2\), or 2 to the power of 2.
Hope that helps! <3
Disclaimer: I am not responsible for anything you get incorrect, as I only have the context and information you provide, and I give my response based on my knowledge supported with credible information from experts and online professional articles.
it’s a pretty easy topic… i’m sure u will get the hang of it :)
HELP
Solve: y + 0 = −1
Answers
Answer:
y=-1
Step-by-step explanation:
There are currently 6,210 fish in a lake. If the number of fish in the lake increased by 15 percent during the last year and 20 percent during the year before that, how many more fish are in the lake currently than in the last two years ago?
Answers
I’m pretty sure the answer should be 1,710 if not i’m sorry
Answer:
1710 fish
Step-by-step explanation:
Let the number of fish in the lake last year be 'x'
The equation becomes-
x + 15x/100=6210 (This is because 15% of x is added in x to become
6210... hope you understand)
x + 15x/100 = 6210
115x/100 = 6210
23x/20 = 6210
x = 6210 * 20/23
x = 270 * 20
x = 5400
Therefore- The number of fish last year = 5400
Now, let the number of fish in the lake 2 years ago be 'y'
The equation becomes-
y + 20y/100 = 5400 (Same logic as last time)
y + 20y/100 = 5400
120y/100 = 5400
24y/20 = 5400
6y/5 = 5400
y = 5400 * 5/6
y = 900 * 5
y = 4500
Therefore- Fish in the lake two years ago = 4500 fish
Difference between current and two years ago = 6210-4500
= 1710 fish
Hope you understood the answer and I hope it helps you :)
(-12) FROM I5=
INTEGERS
Answers
Answer:3
Explanation: For this question the answer sign will be positive so -12+15=15-12 which can be broken into 10-10=0 and 5-2=3 so the answer is 3
What does this mean? I don't understand how to make the equation and solve it.
Answers
Answer: 8
Step-by-step explanation:
The formula for the volume of a cone is V=Bh or V=πr2h
Answer:
16.75
Step-by-step explanation:
V=πr2h
3
3.14*2^2 4/3
A table marked at Rs 15,000 is available for Rs 14,400. Find the discount percent.
Answers
Which pairs of figures in the tessellation are translations of each other?
Answers
Answer:
d
Step-by-step explanation: im incorrect
PLS HELP ITS FOR TOMORROW!!! D:
Answers
\(1.) \: \: \: \: \: = 66 \frac{2}{3} \)
explanation
The units of speed (km per hour) indicate which quantity you have to divide by which.
As the question is given in fraction form it is better to answer in fraction form.
If you find the answer as a decimal it is
66.66666. . which is a recurring decimal. It can be rounded to 66.6 but then it is no longer accurate.
A fraction is exact.
2.)To find gallons per hour, divide the gallons by the hours.
That would be 1/2 of the fuel consumed in 2 hrs
Take half of 5 which is 2 and 1/2
Take half of 2/3 which is 1/3
_________________
add 2 + ½ + ⅓_________________
½ = ³/6⅓ = 2/63/6 + 2/6 = ⅚2 + 3/6 +2/6 = 2 + ⅚_________________
2 and 5/6 gallons are consumed each hour
3.)\(13 \div \frac{1}{2} \)
multiply by the reciprocal\(13 \times 2\)
multiply\( = 26\)
4.)\( = 4\)5.) \( = \frac{9}{50} \)6.) Simplify\( = \frac{4}{5} \)\( = \frac{7}{8} \)\( = \frac{1}{15} \)\( = \frac{1}{9} \)\( = \frac{2}{11} \)\( = \frac{2}{3} \)\( = \frac{3}{20} \)\( = \frac{1}{6} \)\( = \frac{27}{49} \)
hope it helps
#carry on learning
follow me and mark me as brainlist plss
Three out of 5 students at Maria's school participate in a school club or sport. There are 475 students at marias school how many of them can be expected to participate in a school club or sport
Answers
So, the expected number of participating students is:
475 * (3/5) = 285.
Therefore, we can expect 285 students out of 475 to participate in a school club or sport.
1/2(8a+200b)
Is the answer 4a+100b?
Answers
Answer:
you are correct it is, 4a+100b
Step-by-step explanation:
Answer:
Yes
Step-by-step explanation:
When you distribute the 1/2 into the 8a and 200b they turn to 4a and 100b.
Air Pressure You are adding air to a tire. The air pressure in the tire should be 31
27
200 pounds per square inch. What decimal should you watch for on the digital pressure gauge?
You should watch for nothing.
Answers
find the difference of 71.120 - 2.359
Answers
Answer: 68.761
Step-by-step explanation: calculator!!!!!!
Have a great day
The radius of the Ferris wheel is shown. Which is the circumference of the Ferris wheel, rounded to the nearest foot?
A ferris wheel. The radius of the ferris wheel (from the center of the wheel to its edge) is labeled 125 feet.
Answers
Answer:
The circumference is around 785 feet
Step-by-step explanation:
The circumference of a circle is pi x radius x 2 or pi x diameter.
If the Ferris wheel's radius is 125, then this is what you do:
pi x 125 x 2
= pi x 250
= 3.14 x 250
= 785
Answer:
About 785.4
Step-by-step explanation:
C = 2pir
R = 125
2*pi*125 ≈ 785.4
C ≈ 785.4
:) Have a good day :)