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solniwko [45]
4 years ago
9

solve the system of linear equations using substitution. Which expression would be eastier to substitute into the other equation

, in order to solve this problem?

Mathematics
1 answer:
Colt1911 [192]4 years ago
7 0
The x=7y-4 one and put it to where the x in the other equation is.
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Henry wants to paint the ceilings and the walls of his living room. One gallon of paint covers 450 ft squared. The rooms is 24 f
Mamont248 [21]
If you would like to know how many gallons of paint will Henry need to paint his living room, you can calculate this using the following steps:

the ceiling: 24 ft * 18 ft = 432 ft squared
walls: 2 * 24 ft * 9 ft + 2 * 18 ft * 9 ft = 2 * 24 * 9 + 2 * 18 * 9 = 432 + 324 = 756 ft squared

432 ft squared + 756 ft squared = 1188 ft squared

1 gallon of paint ... 450 ft squared
x gallons of paint = ? ... 1188 ft squared

1 * 1188 = 450 * x
1188 = 450 * x    /450
x = 1188 / 450
x = 2.64 gallons of paint

The correct result would be 2.64 gallons of paint.
6 0
3 years ago
Solve x2 + 8x – 3 = 0 using the completing-the-square method.
Inessa [10]
The answer is the last one !
8 0
3 years ago
Who is better math or science
Zielflug [23.3K]

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4 0
3 years ago
Read 2 more answers
Gary won $70,000 in the lottery after all tax deductions. He invested part of the money at 11% and deposited the remainder in ta
Tju [1.3M]
X - invested for the money at 11%
70 000 - x - deposited at 12%

0.11x + 0.12(70000-x)=7900
0.11x + 8400 - 0.12x = 7900
8400- 7900 = 0.01x
500 = 0.01x
x=50 000 invested at 11%
rest (20K) invested at 12%

4 0
4 years ago
Explain if you can please and thank you
svetlana [45]

<u>Given</u>:

Given that the angles of the kite.

The opposite angles of the kite measures (3y + 14)° and (y + 50)°

We need to determine the value of y.

<u>Value of y:</u>

We know the property that the opposite angles are equal.

Thus, applying the property, we have;

3y+14=y+50

Subtracting both sides of the equation by y, we have;

2y+14=50

Subtracting both sides of the equation by 14, we get;

2y=36

Dividing both sides of the equation by 2, we get;

y=18

Thus, the value of y is 18.

4 0
3 years ago
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