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lina2011 [118]
3 years ago
15

The math class has a set of 40 calculators, and 85% of the calculators have working batteries. How many calculators need new bat

teries
Mathematics
1 answer:
777dan777 [17]3 years ago
6 0

Answer:

6

Step-by-step explanation:

you will multiply 40 times .85 since the percent you move the period two times to the left you will get an answer of 34.

you will then subtract 34 out of the 40 and you will get the answer 6.

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A university has 28,980 students. In a random sample of 180 students, 12 speak three or more languages. Predict the number of st
anygoal [31]
Word | know | Unknown
Language| 12 | x
Total | 180 | 28980
Use cross multiply:
12(28980) = 180(x)
347760 = 180x
347760/180=1932
5 0
3 years ago
How to do 2x+4=12 plz show how you got it
OverLord2011 [107]
2x + 4 = 12

We're simply just trying to isolate x.

So, we must get x onto it's own side of the equal sign :)

Our first step is to subtract 4 from both sides.

2x + 4 - 4 = 12 - 4

Simplify.

2x = 8

Then, we divide both sides by 2.

2x ÷ 2 = 8 ÷ 2 

Simplify.

x = 4

----------

To check your work, simply plug in the value of x into x in the original equation.

In this problem, x = 4, so plug in 4 for x.

2x + 4 = 12

2(4) + 4 = 12

Simplify.

8 + 4 = 12

12 = 12

Therefore, x = 4

~Hope I helped!~
8 0
3 years ago
Read 2 more answers
if ur mom had 1 pie and subtracted one (A im a mistake B im not C my mom left or D im dad came with the milk
MaRussiya [10]

Answer:

oof

Step-by-step explanation:

5 0
2 years ago
Jenna and Mike are given two points of a triangle, A(-2,-4) and B(8,6).
Taya2010 [7]

Answer: B) neither Jenna and Mike are correct.

Step-by-step explanation: If you calculate the distance between points B and A, then the points that Mike and Jenna gave, all of the sides would be different.

4 0
1 year ago
Precal question please help I don’t understand
frez [133]

A) True.  The domain of both is: x ≥ 0

B) True. 1/2 is on the outside so it is vertical.  1/2 is between 0 and 1 so it shrinks.

C) False.  the coefficient is not 2 (it is 1/2)

D) False. 1/2 is not on the inside with "x" so it is not horizontal.

Answer: A, B

8 0
3 years ago
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