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Margaret [11]
3 years ago
7

Mike is 4 years older than his sister Olivia. together they are 20 years old. How old is Olivia?

Mathematics
2 answers:
maw [93]3 years ago
5 0

Answer: Olivia is 8 years old.

Step-by-step explanation:

"O" stands for Olivia

O+4 = M

O + O+4 = 20

2O +4=20

2O=16

2O/2 = 16/2

O = 8

Mike is 4 years older, so Mike is 12 years old

12+8 = 20

MrRissso [65]3 years ago
3 0

Answer:

Olivia is 24 years old

step by step

because Olivia is 20 years old and Mike is 4 years older than her so Olivia is 24 years old

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Step-by-step explanation:

First, you have to calculate the 85% of the base price that the dealer pays for the car:

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Third, you have to add the 85% of the base price plus the 75% of the installed options that the dealer has to pay and you also have to add the destination charge of $285:

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3 years ago
If x = 6, then what is y in this equation
svet-max [94.6K]

Answer:

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7 0
3 years ago
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What is the factored form of 5x2 − 18x − 8? (5x + 4)(x + 2) (5x + 2)(x − 4) (5x + 1)(x + 8) (5x + 1)(x − 8)
olya-2409 [2.1K]
Hello! So, this question is in the form of ax² - bx - c. First thingd first, let's multiply a and c together. c = -8 and a = 5. -8 * 5 is -40. Now, let's find two factors that have a product of 40, but a sum of 18. If you list the factors, you see that 2 and 20 have a product of 40, but  2 - 20 is -18. The factors we will use are -2 and 20.

How to factor it:

For this question, you can use something called a box method and factor it by finding a factor of each column and row. Just make 4 boxes and put 5x² on the top left and -40 on the bottom left box. Put 2x on the top right box and -20x on the bottom left box. Now, factor out for each row and column. The factors should be 5x + 2 for the top part and x - 4 for the side. It should look like (5x + 2)(x - 4). Let's check it. Solve it by using the FOIL method and you get 5x² - 20x + 2x - 8. Combine like terms and you get 5x² - 18x - 8. There. The answer is B: (5x + 2)(x - 4)

Note: The box method may be challenging at first, but it can be really helpful on problems like these.
6 0
3 years ago
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