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3 years ago

A plants height is 1.4 times it’s age. write an equation for this situation.

Mathematics

1 answer:

saveliy_v [14]3 years ago

5 0

5 x 1.4 = 7

I hope this helped you out!

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Jane finished a race in 7 minutes. How many seconds is this.

Serggg [28]

Answer:

420 seconds

Step-by-step explanation:

(60 seconds in a minute, 60 x 7 = 420)

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2 years ago

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3 less than the quotient of 20 and x, write an algebraic expression

schepotkina [342]

$\frac{20}{x}-3$

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3 years ago

Helen has 48 cubic inches of clay to make a solid square right pyramid with a base edge measuring 6 inches. Which is the slant h

Nikitich [7]

Answer: 5 inches

Step-by-step explanation:

Given: Volume of clay = 48 cubic inches

If we make a solid square right pyramid with a base edge a= 6 inches.

Then its base area = $a^2=6^2=36\ inches^2$

we know that volume of square right pyramid= $\frac{1}{3}\times\ a^2h$

Therefore, volume of square right pyramid made by all of clay= $\frac{1}{3}\times\ a^2h$ =48 cubic inches

$\Rightarrow\frac{1}{3}\times\ (36)\times\ h=48\\\Rightarrow12h=48\\\Rightarrow\ h=4\ inches.....\text{[Divide 12 on both sides]}$

Now, slant height $l=\sqrt{(\frac{a}{2})^2+h^2}$

$\\\Rightarrow\ l=\sqrt{3^2+4^2}\\\Rightarrow\ l=\sqrt{9+16}\\\rightarrow\ l=\sqrt{25}\\\Rightarrow\ l=5$

The slant height of the pyramid if Helen uses all the clay=5 inches

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3 years ago

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Which of the following is a prime number 67,65,63 or 60

sesenic [268]

Use the rule of divisibility :
60 is composite because it is even so it can be divided by 2
67 is prime because none if the divisiblility rules work on it
65 is composite because it has a 5 by the end which means it can be divided by 5
63 is composite because the sum of the digits equal to 9 which can be divided by 3 and 9

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3 years ago

Find the product. a^4(3a ^2 - 2a + 1)

Vikki [24]

a⁴(3a² - 2a + 1)

We just have to multiply each term inside the parentheses by a⁴ .

 a⁴(3a² ) = 3a⁶

 a⁴( - 2a ) = -2a⁵

 a⁴( 1) = a⁴

Now, just addum up : 3a⁶ - 2a⁵ + a⁴

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3 years ago