All categories

3 years ago

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 %.

You might be interested in

Which expression is equivalent to (q^6)^2 q3 q8 q12 q36

Zepler [3.9K]

I think it’s q12 or C hope this helped

8 0

3 years ago

Louisa ran at an average speed of five miles per hour along an entire circular park path. Calvin ran along the same path in the

docker41 [41]

Answer:

15 miles

Step-by-step explanation:

Let $x$ be the miles in the circular park path, $t_{L}$ the time Louisa takes to finish and $t_{C}$ the time Calvin takes to finish both in hours.

Then $x$ , the longitude is equal to the velocity times the time used to finish. So

$x=5t_{L}$

$x=6t_{C}$

And the difference between Louisa's time and Calvin' time is 30 minutes, half an hour. So:

$t_{C}=t_{L}-0.5$

Three equations, three unknowns, the system can be solved.

Equalizing the equation with x :

$5t_{L}=6t_{C}$

In this last equation replace $t_{C}$ with the other equation and solve:

$5t_{L}=6(t_{L}-0.5)\\ 5t_{L}=6t_{L}-3\\ 3=6t_{L}-5t_{L}\\ 3=t_{L}\\ t_{L}=3$

With Louisa's time find x:

$x=5t_{L}\\ x=5(3)\\ x=15$

7 0

3 years ago

How many different combinations of shirts and ties are possible if you have 4 shirts and 5 ties?

Fittoniya [83]

20 different combinations.

8 0

4 years ago

Read 2 more answers

A circle has a radius of 6 meters. Find the area of the sector whose central angle is 82°. Round to the nearest tenth.

jok3333 [9.3K]

The answer is 25.8 m2 if you have any questions feel free to ask

5 0

4 years ago

Find the simplified product

tekilochka [14]

Answer:

The answer is $-30x^{2} \sqrt{2x}$ , or the first option.

The last option isn't correct for this answer, even though it is correct mathematically. This is because it wants the fully simplified version, so the 5o squared would turn into a 5 and a 2, with the 5 multiplying the -6, and the 2 remaining underneath the square root.

#teamtrees #WAP (Water And Plant)

5 0

3 years ago