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3 years ago

A student says that the algebraic expression 5 x 7 can also be written as 5 7x. is the student correct? explain.

1 answer:

8 0

Nahhhh
So basically WHERE DID THE x COME FROM anyway ???
5 * 7 = 35
but
IT DOES NOT EQUAL TO
57x
It might be true depending on what the x value is, but you dont know what the x value is so ...

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Holiday items are on sale at 15% off the original retail price. If tree lights are regularly $12.40 per set, what is the sale pr

Umnica [9.8K]

12.40*(100-15)=10.54
$10.54 cents is the new cost

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3 years ago

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-0.8b^2+7.4b+(5.6b-0.2b^2)

puteri [66]

Answer:

what? I don't understand lol

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3 years ago

Find the Surface Area:

Lady_Fox [76]

Answer:

D 180 in²

Step-by-step explanation:

step 1

2 (l) (w) + 2 (l) (h) + 2(h) (w)

step 2

2×(6)×(3) + 2×(6)×(8) + 2×(8)×(3)

step 3

2×(18) + 2×(48) + 2×(24)

step4

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2 years ago

You go to a store and have a total of $300 to spend. You see a sign in the store that advertises all jeans are $40 and all shirt

ololo11 [35]

Answer:

You will buy 8 jeans and two shirts.

Step-by-step explanation:

set up a systems of equations

identify your variables

jeans = j (a variable means like 'x')

shirts = s

identify a common way to eliminate a variable

(get a common value in both equations so you can add or subtract to leave on variable in which you can solve for)

8 0

3 years ago

Read 2 more answers

sweet-ann [11.9K]

Answer:

3. 3 : 5; 3: 5

Step-by-step explanation:

First, let's find the leght of the sides of each octagon.

$A= 18in^{2}$

The area of an octagon is defined by

$A=2(1+\sqrt{2})l^{2}$

Replacing the area

$18=2(1+\sqrt{2})l^{2}\\\frac{18}{2(1+\sqrt{2})} =l^{2}\\l=\sqrt{\frac{18}{3.4} } \approx 2.3 \ in$

Therefore, the side of the first octagon is 1.6 inches long.

Its perimeter is: $P=8(2.3in)=18.4in$

$A=50 in^{2}$

$50=2(1+\sqrt{2})l^{2}\\\frac{50}{2(1+\sqrt{2})} =l^{2}\\l=\sqrt{\frac{50}{3.4} } \approx 3.8 \ in$

Therefore, the side of the second octagon is 3.8 inches long.

Its perimeter is $P=8(3.8in)=30.4in$ .

Now, let's divide to find each ratio:

$\frac{3.8}{2.3} \approx 1.65$ (the ratio between sides).

$\frac{30.4}{18.4} \approx 1.65$ (the ratio between perimeters).

Therefore, the closest ratio is 3. 3 : 5; 3: 5

8 0

3 years ago

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