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polet [3.4K]
2 years ago
10

Estimate the sum. 85 + 61.7

Mathematics
2 answers:
Slav-nsk [51]2 years ago
7 0

Answer:

150

Step-by-step explanation:

Round 85 to 90 and 61.7 to 60

dsp732 years ago
5 0
147......................
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The diameter of Debby’s bicycle tire is 24 inches. What is
Alisiya [41]

Answer:

75 in

Step-by-step explanation:

circumference=3.14*diameter. Plug in respective values and get 75.36, and then you round to 75.

3 0
3 years ago
Simplify:<br> 3^2 · 3^4<br> A) 3^6 <br> B) 3^8 <br> C) 3^2 <br> D) 9^6
bonufazy [111]
A. If you're adding numbers with exponents with the same base, keep the same base and add the values of the exponents together.

3^2 * 3^4 = 3^(2+4) = 3^6
8 0
3 years ago
Find value of x such that the data set has a mean of 105: 99, 119, 106, 112; 108
Marizza181 [45]
I'm assuming that x is part of the data set, and, with x, the mean equals 105. To find the value of x, you must add all the data values together to get 544+x (you still don't know what x equals). Then put 544+x over how many days values there are, including x (there are 6). You should have 544+x/6. Now, as this is how you would calculate the mean if you knew what x was equal to, you must set it equal to the mean, since you know what it is (105). You should now have 544+x/6 = 105. You have your equation set up--now you just have to solve it. I would multiply by 6 on both sides to get rid of the 6 on the left side. You would then have 544+x = 630. I would finally subtract 544 from both sides to get x = 86. Your final answer is x = 86.
6 0
3 years ago
What is 27 minus 3.204 minus 10.8
lawyer [7]
   27
- 3.204
  10.8
----------

12.996 ?

6 0
2 years ago
Read 2 more answers
How many quarts of pure antifreeze must be added to 8 quarts of a 40% antifreeze solution to obtain a 60% antifreeze solution
anyanavicka [17]

Let <em>q</em> be the number of quarts of pure antifreeze that needs to be added to get the desired solution.

8 quarts of 40% solution contains 0.40 × 8 = 3.2 quarts of antifreeze.

The new solution would have a total volume of 8 + <em>q</em> quarts, and it would contain a total amount of 3.2 + <em>q</em> quarts of antifreeze. You want to end up with a concentration of 60% antifreeze, which means

(3.2 + <em>q</em>) / (8 + <em>q</em>) = 0.60

Solve for <em>q</em> :

3.2 + <em>q</em> = 0.60 (8 + <em>q</em>)

3.2 + <em>q</em> = 4.8 + 0.6<em>q</em>

0.4<em>q</em> = 1.6

<em>q</em> = 4

4 0
2 years ago
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