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Rus_ich [418]
3 years ago
8

What is the value of x? 64 68 (8x -12) (2x + 18)

Mathematics
1 answer:
tamaranim1 [39]3 years ago
4 0
(8x - 12) + 64 + 68 = 180
(A straight line equals to 180)
8x - 12 + 132 = 180
Combine liked terms
8x + 120 = 180
-120 on both sides
8x = 40
/8 on both sides
x = 5

(8x - 12)
8(5) - 12
40 - 12
28

(2x + 18)
2(5) + 18
10 + 18
28

Answer:
x = 5
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Solve the given system of equations using any method and then choose the correct ordered pair from the given choices:
Mnenie [13.5K]

Answer:

c

Step-by-step explanation:

Given the 2 equations

x + y = 3 → (1)

3x - y = 1 → (2)

Adding the 2 equations term by term will eliminate the term in y

4x = 4 ( divide both sides by 4)

x = 1

Substitute x = 1 into either of the 2 equations and evaluate for y

Substituting into (1)

1 + y = 3 ( subtract 1 from both sides )

y = 2

Solution is (1, 2 ) → c

8 0
3 years ago
Is the ordered pair a solution of y ≥ 2x − 5? a. (3, 1) b. (1, −4)
Deffense [45]

Answer:

a. Yes

b. No

Step-by-step explanation:

To find if an ordered pair is a solution to the inequality, substitute its x and y values for the x and y in the inequality and solve. If the equation is true, then it is a solution. If it is not, then it is not a solution.

1) First, substitute the x and y values of (3, 1) into the inequality. So, substitute 3 for x and 1 for y:

1 \geq 2(3)-5\\1\geq 6-5\\1\geq 1

1 is greater than or equal to 1, so (3,1) is a solution.

2) Second, do the same with the point (1, -4). Substitute 1 for x and -4 for y:

-4\geq 2(1)-5\\\\-4\geq 2-5\\-4\geq -3

However, -4 is not greater than or equal to -3, thus (1, -4) is not a solution.

4 0
3 years ago
Borrows £10,000 over 5 years simple interest rate of 15%
zysi [14]

Answer:

{ \tt{simple \: interest = p \times r \times t}} \\  = 10000 \times 15\% \times 5 \\  = £7500

8 0
3 years ago
PLEASE HELP, I WILL MARK THE FIRST CORRECT ANSWER BRAINLIEST))
77julia77 [94]

Answer:

15 meters

Step-by-step explanation:

The volume of a cylinder is:

V=\pi r^2h

pi is a constant, so there are only 3 variables in this equation. 2 of those are given, so all you need to do is plug in the given values and solve for h:

V=\pi r^2h\\9231.6=3.14\times14^2\times h\\9231.6=3.14\times196\times h\\9231.6=615.44\times h\\15=h\\h=15

The height of this cylinder is 15 meters.

6 0
2 years ago
Help please<br><br><br><br><br><br> thank you
suter [353]
The answer is 5/8.hope this helps
3 0
3 years ago
Read 2 more answers
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