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3 years ago

PLEASE HELP WILL GIVE BRAINLIEST ANSWER

Mathematics

1 answer:

Aneli [31]3 years ago

6 0

The answer is D, which is 32. Hope this helps.

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Evaluate the function. f(x) = x² - 4x – 12 Find f(-7)

pashok25 [27]

Answer:

Your answer is 65

Step-by-step explanation:

f(x) = x² - 4x - 12

f(-7) = (-7)² - 4 x (-7) - 12

= 49 - (-28) - 12

= 49 + 28 - 12

= 77 - 12

= 65

7 0

1 year ago

Sam drinks water at an incredible rate. She drinks 2 1/5 liters of water every 3/4 of an hour. Sam drinks water at a constant ra

lora16 [44]

Answer:

2.9 litres

2 14/15 litres

Step-by-step explanation:

To determine the amount of water Sam drinks in an hour, divide the total amount drunk by the number of hours

Amount drank in an hour = total litres drunk / time

$2\frac{1}{5}$ ÷ $\frac{3}{4}$

$\frac{11}{5}$ × $\frac{4}{3}$ = $\frac{44}{15}$ = 2 $\frac{14}{15}$ litres

7 0

3 years ago

35 points.Helpppp with explanation.

Katena32 [7]

Hey there! :D

The midpoint and the outside line are symmetrical to eachother, 2(BF)= AE

Two midpoint segments equals one AE segment.

So, use the representation above and plug in the numbers.

2(23)= 5x -4

56= 5x-4

Add 4 to both sides.

60=5x

Divide by the 5.

x=12

I hope this helps!

~kaikers <3

7 0

3 years ago

a tree casts a shadow 42 feet long.at the same time, a person 5 feet tall casts a shadow 7 feet long. what is the hight of the t

arlik [135]

Answer:

height of the tree is 30 feet

Step-by-step explanation:

a tree casts a shadow 42 feet long . at the same time, a person 5 feet tall casts a shadow 7 feet long.

shadow of a 5 feet tall person is 7 feet long

Let x be the height of the tree

shadow of a 42 feet tree is x feet long

Make a proportion

$\frac{x}{42} =\frac{5}{7}$

cross multiply

$7x=(42)(5)$

$7x=210$

divide by 7 on both sides

x=30

So height of the tree is 30 feet

4 0

3 years ago

Elizabeth earned $150 a week tutoring . If he saved $75, what percent of the money he earned did he save

olga2289 [7]

Answer:

50%

Step-by-step explanation:

Cuz 75 is 1/2 of 150, so 1/2 is equal to 50%.

8 0

3 years ago