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marin [14]
3 years ago
13

Danny answered 70 % questions correctly on his math test. if he answered 35 questions correctly, how man y were on the test

Mathematics
1 answer:
liraira [26]3 years ago
6 0

Answer:

50 questions.

Step-by-step explanation:

70% - 35

100% - \frac{100}{70} × 35 = 50

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Which is the best estimate for the percent equivalent to 3/8​
Doss [256]

Answer:

D. 38%

Step-by-step explanation:

3/8 as a percentage is 37.5% and that is rounded to 38%! :) 37% is close but it is not rounded making it not the best estimate, therefore it is not correct.

8 0
3 years ago
Match the phenomenal expression on the left with the simplified version on the right
nalin [4]

Given the polynomial expression:

(y + 5)²

(y - 5)(y + 5)

Let's simplify each of the given expression:

a.) (y + 5)²

The given equation is a factor of a perfect square trinomial. For this type of expression, the following is the formula for expanding it.

\text{ (a+b)}^2\text{ = }a^2\text{ + 2ab + }b^2

We get,

\mleft(y+5\mright)^2=(y)^2+2(y)(5)+(5)^2(y+5)^2=y^2+10y+25

b.) (y - 5)(y + 5)

To be able to simplify the following expression. We will be using the formula for the difference of two squares.

(a+b)(a-b)=a^2-b^2

We get,

\mleft(y-5\mright)\mleft(y+5\mright)=(y)^2-(5)^2(y-5)(y+5)=y^2-25^{}

8 0
1 year ago
Calculate the mean 12,2,8,6,57
Rzqust [24]
12+2+8+6+57=85

85/5= 17

mean=17
6 0
3 years ago
Read 2 more answers
5/6 – 6/12<br><br>I am lost bc I'm not a math person so pls help me?
vovangra [49]

First, we must find the common denominator (12)            ✵

10/12-6/12            ✵                 ✵                              ✵                              ✵

Now, why 10?                                     ✵                   ✵                      ✵

Because we CAN'T just take the denominator and change it; we must change both the denominator AND the numerator:

✵                                      •          -                                      ○          

4/12                  ✧                             ✩                                  ✶            ✺         ✱  

We can simplify, or reduce, this fraction:                  ✱  ✱

1/3              ✩                              ✦                                        ✤

I hope it helps!

*VirtuosoTeen*

7 0
3 years ago
Read 2 more answers
Nancy wants to make a graph to show the relationship between the temperature of water, in degrees Celsius, and the time, in minu
LenaWriter [7]
Not entirely sure, but it seem the answer could be B.) It will not be spread out vertically across the entire coordinate plane because in step 5, Nancy selected an incorrect scale on the y-axis. 
3 0
3 years ago
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