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Sonbull [250]
3 years ago
5

7 – 4 (3a – 5) I NED HLP ASAP. I WILL TRY BRAINLIEST TO FIRST ANSWER. EXPLANATION ALSO NEEDED

Mathematics
1 answer:
Lina20 [59]3 years ago
6 0

The answer is a = 2.25.

Simplifying

7 + -4(3a + -5) = 0

Reorder the terms:

7 + -4(-5 + 3a) = 0

7 + (-5 * -4 + 3a * -4) = 0

7 + (20 + -12a) = 0

Combine like terms: 7 + 20 = 27

27 + -12a = 0

Solving

27 + -12a = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-27' to each side of the equation.

27 + -27 + -12a = 0 + -27

Combine like terms: 27 + -27 = 0

0 + -12a = 0 + -27

-12a = 0 + -27

Combine like terms: 0 + -27 = -27

-12a = -27

Divide each side by '-12'.

a = 2.25

Simplifying

a = 2.25

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valina [46]

Answer:

x=-1.83

Step-by-step explanation:

1-2x=4(x+3)

1-2x=4x+12

-2x=4x+12-1

-2x=4x+11

-2x-4x=11

-6x=11

x=11÷-6

x=-1.83

4 0
3 years ago
Write an equation of the line that passes through the given points.<br> (-1,7) and (4, -8)
djverab [1.8K]

Answer:

y=-3x+4

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-8-7)/(4-(-1))

m=-15/(4+1)

m=-15/5

m=-3

y-y1=m(x-x1)

y-7=-3(x-(-1))

y-7=-3(x+1)

y=-3x-3+7

y=-3x+4

3 0
3 years ago
PLEASE HELP 11 POINTS
Free_Kalibri [48]

Answer:

It should be 87.92

Step-by-step explanation:

4 0
3 years ago
HELP PLZ URGENT!HELP PLZ URGENT!HELP PLZ URGENT!HELP PLZ URGENT!HELP AGAIN AGAIN
MrMuchimi

Answer:

a

Step-by-step explanation:

3 0
3 years ago
During a sale at a bookstore, a customer buys one book at full price. The customer is given a 25 percent discount on a second bo
RoseWind [281]
Amount paid for the first book is $17.

Amount paid for the second book is 0.75 x 8 = $6

Total amount paid = $17 + $6 = $23

Total full cost of the two books = $17 + $8 = $25

Amount of discount = $25 - $23 = $2

% reduction = \frac{2}{25} \times100\%=8\%

Therefore, the <span>percent of the total cost of the two books reduced during the sale</span> is 8%
6 0
3 years ago
Read 2 more answers
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