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4 years ago

How do i solve this expression out

Mathematics

1 answer:

sergiy2304 [10]4 years ago

8 0

Use the distrubution property and multiply -16 by -8s and 17.

128s-272

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I need the answer ASAP!!

aliina [53]

Answer:

Step-by-step explanation:

15 divided by 3 is 5 and since it is 5 per hour 8 times 5 is 40

4 0

3 years ago

Read 2 more answers

Assume sin t =.45 and sin w =.89 both t and w are postive and both t and w determne a terminal point in a quadrant 1. which of t

Sidana [21]

The sine function is increasing in the first quadrant.
sin(0) = 0
sin(90) = 1

This means the larger angle will give a larger sine value.
sin(w) > sin(t) -----> w > t

5 0

3 years ago

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You have a land-line telephone that costs $25.95/month plus a utilities tax of 4.5%. How much will you pay for your telephone us

dalvyx [7]

Answer

C) 325.41

Step by step explanation

The land-line telephone costs =$25.95

Utilities tax percentage = 4.5% = 4.5/100 = 0.045

Utility tax for amount $25.95 = 25.95*0.045

Utility tax = $1.17

The amount of telephone bill with tax = $25.95 + $1.17

= $27.12

There are 12 months in a year.

Telephone bill for a year = $27.12 * 12

= $325.44

Therefore, the nearest amount $325.41

You need to pay $325.41 as telephone bill for a year.

Thank you.

5 0

4 years ago

Read 2 more answers

10) Spike drives for 50 miles at 60mph. He slows down and travels

Anettt [7]

Answer:

2 1/3 hours or 2 hours 20 minutes.

51.4 mph to 1 decimal place.

Step-by-step explanation:

Time = distance speed

First 50 miles time taken = 50 / 60 = 5/6 hours

Second 50 miles - time = 50/40 = 5/4 hours.

Final 20 miles - time taken = 20 / 80 = 1/4 hours.

Total time taken = 5/6 + 5/4 + 1/4

= 5/6 + 6/4

= 10/12 + 18/12

= 28/12

= 7/3 or 2 1/3 hours or 2 hours 20 minutes.

Average speed = total distance / total time

= 120 / 7/3

= 120 * 3/7

= 51.4 mph to 1 decimal place.

6 0

3 years ago

Cedric completed the square for the quadratic expression 5x^2−40x+15 in order to determine the minimum value of the expression,

Olegator [25]

Answer:

Step 3 is not correct (should be $(x-4)^2$ , not $(x+4)^2$

Step-by-step explanation:

The expression that we have to simplify is:

$5x^2-40x+15$

We proceed step-by-step, in order to find the mistake did by Cedric:

1) First, we factorize the 5 outside:

$5(\frac{5x^2}{5}-\frac{40x}{5}+\frac{15}{5})=5(x^2-40x+3)$ --> this step is correct

2) We add +16 and -16 inside the brackets:

$5(x^2-8x+16-16+3)$ --> this step is correct

3) We rewrite the term $(x^2-8x+16)$ as the square of a bynomial, which is $(x-4)^2$ , so the expression becomes

$5((x-4)^2-16+3)$ --> we notice that this step is wrong: in fact, Cedric wrote $(x+4)^2$ , which is not correct.

4) Now we continue: we rewrite -16+3 as -13,

$5((x-4)^2-13)$

5) Finally, we multiply the 5 by the terms in the bracket:

$=5(x-4)^2-65$

5 0

3 years ago