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3 years ago

Solve Q=3a+5ac for a

1 answer:

8 0

Here is how you solve...

Q= 3a+5ac

take out the common variable.
Q= a(3+5c)

get A by its self so divide each side by (3+5c).
Q/a(3+5c)= a(3+5c)/(3+5c)

Q/a(3+5c)=A

So your answer is A= Q/a(3+5c)

hope that helped.

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Barb Hotchkins is in the 28 percent tax bracket. A tax-exempt employee benefit with a value of $500 would have a tax-equivalent

ratelena [41]

Take 28% of 500 which is 140 then add that to 500.

The answer is 640.

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3 years ago

Please solve the combination of equations here.

klemol [59]

Answer:

$\left \{ {{x=5} \atop {y=7}} \right.$

Step-by-step explanation:

$\left \{ {{x+y=12} \atop {3y = 4x+1}} \right.$

$\left \{ {{x=12-y} \atop {3y=4x+1}} \right.$

We are going to do a replacement of x for a second equation

So instead

$3y=4x+1$

in the place of x we are putting 12-y from the first equation, so

$3y = 4(12-y)+1$

To leave the brackets we need to do multiplication

$3y = 4*12-4*y+1$

Which is

$3y = 48-4y+1$

$3y = -4y+49 /+4y\\7y = 49 /:7\\y = 7$

How to determine x? From the first equation:

If the x +y = 12 then the x = 12-y so x = 12-7 = 5

We should write solution as a pair:

$\left \{ {{x=5} \atop {y=7}} \right.$

7 0

3 years ago

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zepelin [54]

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3 years ago

Which number below has a value between 6.6 and 6.7?

wariber [46]

Answer:

square root of 44

Step-by-step explanation:

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4 years ago

Pl help is for homwork

HACTEHA [7]

Answer:

Sabrina bought 3 pounds of bananas.

Step-by-step explanation:

Given equations are:

a + b = 8 Eqn 1

0.95a + 1.10b = 8.05 Eqn 2

As we have to find the number of pounds of bananas bought, we will eliminate the variable a from the equation.

Multiplying Eqn 1 by 0.95

0.95(a+b=8)

0.95a+0.95b=7.60 Eqn 3

Subtracting Eqn 3 from Eqn 2

(0.95a+1.10b)-(0.95a+0.95b)=8.05-7.60

0.95a+1.10b-0.95a-0.95b=0.45

0.15b = 0.45

Dividing both sides by 0.15

$\frac{0.15b}{0.15}=\frac{0.45}{0.15}\\b = 3$

Hence,

Sabrina bought 3 pounds of bananas.

3 0

3 years ago