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3 years ago

13

In math class a student scored 82 85 92 93 on 4 math test respectively what must the student score on a 5 test to earn an averag

e of a 90 across all 5 test

1 answer:

prisoha [69]3 years ago

7 0

They’re going to have to get a 98%

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What is the value of ∑n=13(17n−15)?

Viktor [21]

13 x 17n - 13 x 15
= 221n - 195

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3 years ago

Which binomial expressions are factors of 4x3+9x2−x−6? <br><br> Select each correct answer.

lapo4ka [179]

Answer:

It is (x+ 1

Step-by-step explanation:

Because -1 is a root because 4(-1)^3 + 9(-1)^2 - (-1) - 6 = -4 + 9 + 1 - 6 = -5 + 5 = 0

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3 years ago

At the beginning of an environmental study, a forest covered an area of 1500 km2 . Since then, this area has decreased by 9.8% e

fredd [130]

Answer:

$A(t)=(0.902)^t \cdot 1500$ $[km^2]$

Step-by-step explanation:

In this problem, the initial area of the forest at time t = 0 is

$A_0 = 1500 km^2$

After every year, the area of the forest decreases by 9.8%: this means that the area of the forest every year is (100%-9.8%=90.2%) of the area of the previous year.

So for instance, after 1 year, the area is

$A_1 = A_0 \cdot \frac{90.2}{100}=0.902 A_0$

After 2 years,

$A_2=0.902 A_1 = 0.902(0.902A_0)=(0.902)^2 A_0$

And so on. So, after t years, the area of the forest will be

$A(t)=(0.902)^t A_0$

And by substituting the value of A0, we can find an explicit expression:

$A(t)=(0.902)^t \cdot 1500$ $[km^2]$

8 0

4 years ago

Which of the following will result in a rational answer? multiplying pi by a fraction adding the square root of a non perfect sq

Klio2033 [76]

Pi is irrational so multiplying it by a fraction will result in an irrational number.

square root of non perfect square will also give an irrational.

adding pii to rational will give irrational.

The answer is the las t One:- Multiplying a fraction by a repeated decimal - because a repeated decimal can be written as a fraction.

5 0

4 years ago

Read 2 more answers

If Cody has 414 gallons of blue paint. He uses 223 gallons of blue paint to paint his bedroom. How much paint does Cody have lef

Vinvika [58]

Answer:

414 - 223

= 191

Step-by-step explanation:

414-223 = 191 he has 191 paint left

to check the answer we do

191 + 223 = 414 our answer is correct

4 0

3 years ago