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3 years ago

Simplify the product using FOIL. (2x – 7)(5x 5)

1 answer:

3 0

FOIL is an 'acronym'. It helps you remember how to multiply
two binomials ... like (2x-7) and (5x+5) .

FOIL stands for "First, Outside, Inside, Last". Here's how it's used
to multiply these particular two binomials:

   (2x - 7) (5x + 5)

First: (2x) (5x) = 10x²

Outside: (2x) (5) = 10x

Inside:   (-7) (5x) = -35x

Last: (-7) (5) = -35

Add them all together, and you have the product:

   10x² + 10x -35x -35

Simplify the sum: 10x² - 25x -35

   or 5(x² - 5x - 7) .

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A student scores 73 out of 100 on a test. If the maximum score on the next test is also 100 points, what score does the student

vesna_86 [32]

Because the student scored 73/100 on the first test, their current average is 73%.

To calculate the avergae with the next test score, you add both percentages the student gets together and then divide by 2.

79 = (73 + x) / 2

Multiply by 2 on both sides

158 = 73 + x

Subtract 73 on both sides

x = 85

So the student needs to get at least an 85/100 on the next test to maintain a 79 average.

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3 years ago

The height of a golfball hit off a 128-foot hill is modeled by the function h(t) = −16t2 + 32t + 128, where h is height in feet

taurus [48]

The time taken for the golf ball to reach the ground is 1 s.

<h3>Motion of the golf ball</h3>

The path of motion of the golf ball can be described as parabolic because it is projectile.

When the golf ball reaches the ground, the final velocity will be zero.

Velocity of the golf ball is change in height with time.

v = dh/dt

h(t) = -16t² + 32t + 128

dh/dt = -32t + 32

0 = -32t + 32

32t = 32

t = 1 s

Thus, the time taken for the golf ball to reach the ground is 1 s.

Learn more about time of motion here: brainly.com/question/2364404

5 0

2 years ago

How would you go about writing a function?

Nesterboy [21]

Hm...I'm not quite sure..but if we were to write a function..hm....Honestly I'm not sure.

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3 years ago

What is the range of the function represented by these ordered pairs?

JulijaS [17]

Answer:

Step-by-step explanation:

The range of a data set is the y-coordinates of the ordered pairs.

So, we have the ordered pairs:

{(-2,1), (0,0), (3,-1), (-1,7), (5,7)}

So, the range will be (the bolded numbers):

{(-2,1), (0,0), (3,-1), (-1,7), (5,7)}

Thus, our answer is:

{-1, 0, 1, 7}

Note that the range should be in ascending order.

Also note that even though 7 appears twice, 7 is 7, so we only put one 7.

The answer is B.

8 0

3 years ago

Erin is volunteering at a soup kitchen. At the start of her shift, she is provided with a 16.3-

marysya [2.9K]

Answer:

0.3

Step-by-step explanation:

total:16.3

20*0.8=16 (amount she will use)

16.3-16=0.3

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3 years ago