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brilliants [131]
3 years ago
7

Why and when do we cross multiply in algebra?

Mathematics
2 answers:
Nataly [62]3 years ago
4 0

Answer:

You cross multiply to solve for a variable. You cross multiply when given a proportion.

FromTheMoon [43]3 years ago
3 0

Answer:

To solve Fractions also.

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The school store sells pencils for $0.30 each, hats for $14.50 each, and binders for $3.20 each.
astraxan [27]

Answer: the answer is $29.9

Step-by-step explanation:

No, she wrong it will be less than $20

4 0
3 years ago
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Written as a simplified polynomial in standard form, what is the result when (x-8)^2
neonofarm [45]

Answer:

26x-67-x²

Step-by-step explanation:

We are given

(10x - 3) - (x - 8) {}^{2}

Expanding (x-8)²=x²-16x+64

10x-3-(x²-16x+64)

10x-3-x²+16x-64

26x-67-x²

3 0
3 years ago
You and a friend are playing a game of chance. Every time you roll a 1 or 2 you are successful, and your friend will pay you $1.
LUCKY_DIMON [66]

At the end of the game you owned 13 cents if 71% of your rolls are successful and 29% of your rolls are unsuccessful option first is correct.

<h3>What is probability?</h3>

It is defined as the ratio of the number of favourable outcomes to the total number of outcomes, in other words, the probability is the number that shows the happening of the event.

We have:

Every time you roll a 1 or 2 you are successful, and your friend will pay you $1. Every time you roll a 3, 4, 5 or 6, you must pay your friend $2.

71% of your rolls are successful:

= 1×0.71

= $0.71 (won)

29% of your rolls are unsuccessful

= 2×2.9

= $0.58 (lose)

The amount owned = 0.71 - 0.58 = $0.13 = 13 cents

Thus, at the end of the game you owned 13 cents if 71% of your rolls are successful and 29% of your rolls are unsuccessful option first is correct.

Learn more about the probability here:

brainly.com/question/11234923

#SPJ1

6 0
2 years ago
Which of the following is correct?<br> degrees
yarga [219]

Answer:

angle A + angle B = 180 degrees is correct

Step-by-step explanation:

5 0
3 years ago
How can we get Equation B from Equation A? A. 5 = -2 (x - 1) B. 5 = -2x + 2 How can we get Equation B from Equation A?
lesya [120]

Answer:

Please check the explanation.

Step-by-step explanation:

<u>Determining equation B from Equation A</u>

Given the equation A

5\:=\:-2\:\left(x\:-\:1\right)

Apply distributive law a\left(b-c\right)=ab-ac

5= -2x+2    which is equation B

Hence, equation B can be obtained by implementing the distributive law operation on equation A.

<u>Determining equation A from Equation B</u>

Given the equation B

5 = -2x + 2

Factor out common term -2 on the right-hand side of the equation

5=-2\left(x-1\right)  which is the equation A

Hence, equation A can be obtained by factoring out the common term -2 on the right-hand side of equation B.

7 0
3 years ago
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