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3 years ago

Each question on a test was worth 5 points. What was the total number of points if there were n questions?

Mathematics

1 answer:

jarptica [38.1K]3 years ago

8 0

The total number of points would be equal to 5n.

You would simply multiply 5 by the amount of questions. In this case, we do not know the amount, so we can use the variable n.

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Will earned $90 interest on his investment account. He originally deposited $500 and got %6 simple interest. For how many years

Anit [1.1K]

If he earns 6% interest per year, then he will have had money in his investment account for three years.

I hope this answer helped you! If you have any further questions or concerns, feel free to ask! :)

8 0

3 years ago

write an expression that represents the weight of an object that weighs 12 pounds and increases by 0.5 pounds per month m. PLEA

worty [1.4K]

Answer:

W=12+0.5M

Step-by-step explanation:

4 0

3 years ago

The formula for finding the volume of a rectangular prism is V = lwh. The height h of a rectangular prism is 12 centimeters. The

Debora [2.8K]

Answer:

x = 12

prism's length = 36 centimeters

Prisms width = 25 centimeters

Step-by-step explanation:

volume of a rectangular prism, V = length × width × height

volume = 10,800 cubic centimeters

prism's length = 3x

Prisms height = 12 centimeters

Prisms width = (2x + 1)

volume of a rectangular prism, V = length × width × height

10,800 = 3x * 2x + 1 * 12

10,800 = 6x² + 3x * 12

10,800 = 72x² + 36x

72x² + 36x - 10,800 = 0

2x² + x - 300 = 0

Using quadratic formula

x = -b ± √b² - 4ac / 2a

= -1 ± √1² - 4*2*-300 / 2*2

= -1 ± √1 - (-2400) / 4

= -1 ± √1 + 2400 / 4

= -1 ± √2401 / 4

= -1 ± 49 / 4

x = (-1 + 49)/4 or (-1 - 49)/4

= 48/4 or -50/4

x = 12 or -12.5

x cannot be a negative value

Therefore, x = 12

prism's length = 3x

= 3(12)

= 36 centimeters

prism's length = 36 centimeters

Prisms width = (2x + 1)

= 2(12) + 1

= 24 + 1

= 25 centimeters

Prisms width = 25 centimeters

6 0

3 years ago

What is the simplified value of the exponential expression 16^1/4?

erik [133]

<h2>Answer</h2>

<h2>Explanation</h2>

First, we are going to use the law of fractional exponents: $a^{\frac{1}{n} =\sqrt[n]{a}$

We can infer form our expression that $a=16$ and $n=4$ , so let's replace the values:

$a^{\frac{1}{n} =\sqrt[n]{a}$

$16^{\frac{1}{4} }=\sqrt[4]{16}$

Notice that we can also decompose 16 into prime factors to get $16=2^4$ , so we can rewrite our expression as follows:

$\sqrt[4]{16}=\sqrt[4]{2^4}$

Finally, we can use the rule of radicals: $\sqrt[n]{a^n} =a$ , so:

$\sqrt[4]{2^4}=2$

4 0

3 years ago

Can someone help please????

egoroff_w [7]

Y= 80.55% approximately, 80.6% rounded up

Calculations:

The percent (percentage) of a given number p/q can be found, for the most part, without a calculator by a slight change in the notation:

y=the number 29/36 expressed as a percent becomes

y=[29(2.7777777778 approx.)]/[36(2.7777777778 approx.)]

y=0.8055 approx. (Express the decimal numeral as a percent)

y=0.8055(100)

y=

80.55% approx., which is 80.6% rounded up to the nearest tenth percent

5 0

2 years ago