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3 years ago

If f(x) = 2x squared - 5x + 7 what is the value of f(-3)

Mathematics

1 answer:

ch4aika [34]3 years ago

4 0

Answer:

f(-3)=40

Step-by-step explanation:

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What is 24 + 100 then times it by two is there more than 120

MatroZZZ [7]

24 + 100 is 124, and 124 x 2 = 248. So yes it is more than 120

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3 years ago

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What is the square of 7

kkurt [141]

2.64575131106 I don’t know if you need to round the answer or not

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A water tank holds 944 gallons but is leaking at a rate of 5 gallons per week. A second water tank holds 1,180 gallons but is le

podryga [215]

Answer:

Step-by-step explanation:

The equation is

944 - 5x = 1180 - 9x

Notice what is being said. You start with 944 gallons and take off 5 per week

You also start with 1180 gallons and take on 9 per week.

You want to know when the two are equal. The second tank is larger, but it leaks more. That's what's going to bring about equality.

Add 9x to both sides

944 - 5x + 9x = 1180

944 + 4x = 1180

Subtract 944 from both sides.

4x = 1180 - 944

4x = 236

Divide by 4

x = 236/4

x = 59 weeks

8 0

3 years ago

The three sides of a triangle are n, 3n+3, and 2n+11. If the perimeter of the triangle is 50 inches, what is the length of each

mylen [45]

Answer:

6, 21, and 23 inches

Step-by-step explanation:

The perimeter of a triangle is equal to the sum of all side lengths in that triangle. We're given the perimeter as 50 inches, and the side lengths as n, 3n + 3, and 2n + 11.

This means that we can algebraically solve the equation $n + 3n + 3 + 2n + 11 = 50$

Step 1: Combine like terms.

$(n+3n+2n) + (3+11) = 50$
$6n + 14 = 50$

Step 2: Subtract 14 from both sides.

$6n + 14 - 14 = 50 - 14$
$6n = 36$

Step 3: Divide both sides by 6.

$6n/6 = 36/6$
$n = 6$

Step 4: Plug in the value of n as 6 in each side.

$(6) + (3(6) + 3) + (2(6)+11) = 50$
$(6) + (18+3) + (12+11) = 50$
$(6) + (21) + (23) = 50$

Therefore, the side lengths are 6, 21, and 23 inches.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

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2 years ago

Which of the following equations represents the line with a slope of -7/4 and a y-intercept of -11?

andreev551 [17]

Y= -7/4x - 11
My answer has to be 20 characters longkdmmwmmckkdmsnskckd

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3 years ago