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3 years ago

Which expression is equivalent to 30x + 15y? a)45xy b)xy+45 c)15(2x+y) d)15xy(2x+y)

Mathematics

2 answers:

nekit [7.7K]3 years ago

6 0

Answer: C hope this helped

nevsk [136]3 years ago

4 0

Answer:

Step-by-step explanation:

because 15*2x=30x and 15*y= 15y and since they are adding in the parentises you add again 30x*15y

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What is f(x) = 2x2 + 28x – 5 written in vertex form? f(x) = 2(x + 7)2 – 19 f(x) = 2(x + 7)2 – 103 f(x) = 2(x + 14)2 – 14 f(x) =

padilas [110]

Answer:

f(x)=2(x+7)^2-103

Step-by-step explanation:

$f(x)=2x^{2} +28x-5\\=2(x^2+14x)-5\\=2(x^2+2(7)x+7^2-7^2)-5\\=2(x+7)^2-2(49)-5\\=2(x+7)^2-103$

6 0

3 years ago

Read 2 more answers

Aaron uses the equation y=500+0.2x to determine his weekly paycheck based on his sales volume, where y represents the amount of

lbvjy [14]

Answer:

1050 units

Explanations:

Given the equation y=500+0.2x to determine his weekly paycheck based on his sales volume, where:

y is the amount of his check

x is the number of units he sells each month.

In order to determine the amount of units he would need to sell for his paycheck to be $710, we willl substitute y = 710 into the equation and find the value of x as shown:

y=500+0.2x

710 = 500+0.2x

710-500 = 0.2x

210 = 0.2x

0.2x = 210

Divide both sides by 0.2

0.2x/0.2 = 210/0.2

x = 1050

Hence he would need 1,050 units to sell for his paycheck to be $710

6 0

1 year ago

How much pure water must be mixed with 10 liters of a 25% acid solution to reduce it to a 10% acid solution?

kakasveta [241]

15 liters. that is the answer.

7 0

3 years ago

Read 2 more answers

Tabitha decided to start saving pennies for a stretch of two months and initially started with 2 pennies. A table showing the nu

svetoff [14.1K]

Answer:

after week 7: 4374 pennies
486 pennies: after week 5

Step-by-step explanation:

The sequence values have a first term of 6 and a common ratio of 3, so can be described by the formula ...

an = 6·3^(n-1)

This can be rearranged to ...

an = 2·3^n

When n=7, the value is ...

a7 = 2·3^7 = 4374 . . . . pennies saved after 7 weeks

To find when there are 486 pennies saved, we can solve the equation ...

486 = 2·3^n

243 = 3^n

log(243) = n·log(3) . . . . . . . take the logarithm

log(243)/log(3) = n = 5 . . . . divide by the coefficient of n

Tabitha will have saved 486 pennies after 5 weeks.

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3 years ago

Can you help on word problems?

Ne4ueva [31]

Uh sure if you give me the problem I could help

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3 years ago