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3 years ago

A and b are positive integers. Find −2a+3b if a^3 b^2=72.

1 answer:

3 0

The answer for "-2a + 3b" is 5.

To solve this equation, you must first find "a" and "b". A^3 times B^2 = 72. In this case, a = 2 (2*2*2 = 8) and b = 3 (3*3 = 9) since their outcomes multiplied together equal 72.

Now you fill in for "a" and "b". "-2*2 + 3*3" before adding you do all the multiplying, which leaves "-4 + 9". Combining like terms gives you 5.

I hope this helps!!

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A ball was tossed up into the air. The height of the ball as a function of the time the ball is in the air in seconds can be mod

Andrei [34K]

The height of the ball 2 seconds after being thrown is 20.8m

In order to get the required quadratic function, we need to write the given information as coordinate.

If the time the ball was initially thrown in the air, it was 7. 5 meters off the ground, this is written in a coordinate form as (0, 7.5)

If after 1. 25 seconds, the ball was at its maximum height of 15.3125 meters in a coordinate form as (1.25, 15.3125)

Get the slope of the equation;

$m=\frac{15.3125-7.5}{1.25-0}\\m= \frac{7.8125}{1.25}\\m= 6.25$

Get the y-intercept "b"

Recall that y = mx + b

$7.5=6.25(0) + b\\7.5 = b\\ b= 7.5$

Get the required equation:

$y = 6.65x + 7.5$

Next is to get the height of the ball 2 seconds after being thrown

$y = 6.65x + 7.5\\y = 6.65(2)+ 7.5\\y=13.3 + 7.5\\y=20.8m$

Hence the height of the ball 2 seconds after being thrown is 20.8m

Learn more on functions here: brainly.com/question/1214333

3 0

3 years ago

Please solve this question?

fredd [130]

Answer:

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Step-by-step explanation:

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3 years ago

-5 = .25d +3<br><br> Help me

Natalka [10]

Answer:

$d = - 32$

Step-by-step explanation:

$- 5 = 0.25d + 3 \\ add \: 5 \: from \: both \: sides \\ \\ - 0.25 = 8 \\ divide \: both \: sides \: by \: - 0.25 \\ \\ d = - 32$

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4 years ago

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olga2289 [7]

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3 years ago