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3 years ago

Select all expressions that are equivalent to 5x + (x+6) + 3x.

Mathematics

2 answers:

liraira [26]3 years ago

5 0

The correct answer is 9x+6.

SashulF [63]3 years ago

4 0

Answer:

Step-by-step explanation:

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Mary's total bill for a used car is $2,700.00. If she pays an equal amount each month for an entire year, how much will she have

nasty-shy [4]

Answer:

$225

Step-by-step explanation:

When Mary pays the cost in 12 equal payments, each is 1/12 of the total amount.

1/12 × $2700 = $225

Mary will have to pay $225 each month.

4 0

1 year ago

Prove that C(50,3) + C(50,4) = C(51,4)

valkas [14]

By definition of the binomial coefficient,

$C(n,k) = \dfrac{n!}{k!(n-k)!}$

so we have

$C(50,3) + C(50,4) = \dfrac{50!}{3!47!} + \dfrac{50!}{4!46!} \\\\ = \dfrac{50!}{3!46!} \left(\dfrac1{47} + \dfrac14\right) \\\\ = \dfrac{50!}{3!46!} \times \dfrac{51}{188} \\\\ = \dfrac{51!}{3!46!} \times \dfrac1{4\times47} \\\\ = \dfrac{51!}{4!47!} \\\\ = \dfrac{51!}{4!(51-4)!} = C(51,4)$

as required.

5 0

2 years ago

What does the ratio pi represent in any circle?

Hoochie [10]

The number pi is a constant, it's the ratio of a circles circumference to it's diameter.

5 0

3 years ago

Help pls ! I’ll mark brainliest

alexandr402 [8]

Answer:

$y = x + 3$

Step-by-step explanation:

Y in math is usually referred as the output.

X is usually the input.

In other words,

y is 3 more greater than x.

In other words,

$y = x + 3$

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3 years ago

PLEASE I NEED HELP SSS AAS NOT CONGRUENT SAS ASA

ozzi

SAS IS YOUR ANSWER!

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2 years ago