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stepan [7]
3 years ago
15

If the average grade of an English class rose from 70 to 85, what is the approximate percent increase?

Mathematics
2 answers:
Basile [38]3 years ago
4 0

85 - 70 = 15

15/70 = 0.21428571428

Round to .21

Move decimal over twice to the right

21%

wariber [46]3 years ago
3 0

Answer:

The percent increase is 21%.

Step-by-step explanation:

Given,

The original average grade = 70,

New average grade = 85,

Total changes in the average grade = New average grade - original average grade

= 85 - 70

= 15

Since,

\text{The percentage increment in the grade}=\frac{\text{Total changes}}{\text{Original grade}}\times 100

=\frac{15}{70}\times 100

=\frac{1500}{70}

=21.4285714\approx 21\%

⇒ The approximate percent increase is 21 %.

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Elza [17]

Answer:

246 physics books

186 biology books

Step-by-step explanation:

1) there are 432 total books

2) there are 60 more physics books than biology books

3) 432 - 60 = 372

4) 372 divided by 2 = 186

5) 432 - 186 = 246

Check:

246 + 186 = 432

246 - 186 = 60

hope this helped :)

6 0
3 years ago
Which of the following best describes the graph of the polynomial function below?
WARRIOR [948]

Answer:

A. The graph has two zeroes.

Step-by-step explanation:

A <em>zero of a polynomial</em> is a value of x that makes the polynomial equal to zero.

In other words, it is <em>an x-intercept</em>.

The graph crosses the x-axis twice, so there are two zeroes.

5 0
3 years ago
Read 2 more answers
Rewrite using the distributive property and GCF 16 + 40
Artist 52 [7]

The GCF of 16 and 40 is 8.

16/8 = 2

40/8 = 5

We can rewrite this using the distribute property like so:

<h3><u>8(2 + 5)</u></h3>

Using the distributive property:

16 + 40

16 + 40 = 56

We can also add inside the parentheses and multiply and we'll get the same answer.

8(7)

56


8 0
3 years ago
Examine the system of equations. y = 4x + 8, y = 4x – 1 Which statements best describe the two expressions? Check all that apply
Lerok [7]

Answer:

The correct statements are as follows;

1. They have different y-intercepts

2. The substitution method results in false statement 8 = -1

3. There is no solution

Step-by-step explanation:

Here, we want to select the statement that best describes the equations

The equation for a straight line is generally;

y = mx + b

m is slope and b is the y-intercept

slope of both is same ; 4

So first assertion is wrong

they have different y-intercepts

First y-intercept is 8, second is -1

This is correct

The third statement is correct too

if we equated both y;

4x + 8 = 4x -1

We shall have 4x canceled out and left with 8 = -1

(8,-1) is not a solution

There is no solution is correct because after substituting, we have 8 = -1 which is not correct and also impossible

7 0
3 years ago
Solve (2x3-5x2+8)(x+3)
neonofarm [45]

Answer:

(2 {x}^{3}  - 5 {x}^{2}  + 8)(x + 3) \\  = (2 {x}^{4}  - 5 {x}^{3}  + 8x + 6 {x}^{3}  - 15 {x}^{2}  + 24) \\  = 2 {x}^{4}  +  {x}^{3}  - 15 {x}^{2}  + 8x + 24

8 0
2 years ago
Read 2 more answers
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