Answer:
c=2
Step-by-step explanation:
hope it helps :)
Simplifying
3 + -1(2c + -8) = 7
Reorder the terms:
3 + -1(-8 + 2c) = 7
3 + (-8 * -1 + 2c * -1) = 7
3 + (8 + -2c) = 7
Combine like terms: 3 + 8 = 11
11 + -2c = 7
Solving
11 + -2c = 7
Solving for variable 'c'.
Move all terms containing c to the left, all other terms to the right.
Add '-11' to each side of the equation.
11 + -11 + -2c = 7 + -11
Combine like terms: 11 + -11 = 0
0 + -2c = 7 + -11
-2c = 7 + -11
Combine like terms: 7 + -11 = -4
-2c = -4
Divide each side by '-2'.
c = 2
Simplifying
c = 2
Answer:
17
Step-by-step explanation:
The expression of interest is the difference of the two given expressions.
(-4x +6y) -(-2x -7y) = (9) -(-8)
-2x +13y = 17
The value is 17.
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<em>Additional comment</em>
You could go to the trouble to solve the two equations for x and y, then compute the value of the expression you want. As we saw above, that is not necessary.
The first step in problem solving is always "look at the given information and how it relates to what you are asked." A little time spent doing that can save a lot of effort in the actual problem solving process.
Answer:
5, 42, 15, 82
Step-by-step explanation:
y=4x+2
22=4x+2
20=4x
5=x
y=4(10)+2
y=40+2
y=42
62=4x+2
60=4x
15=x
y=4(20)+2
y=80+2
y=82
Answer:
= 30.144 km²
Step-by-step explanation:
Area of a sector is given by the formula;
θ/360 × πr², where θ is the angle subtended by the arc to the center of the circle, and r is the radius.
Area = 54/360 × 3.14 × 8 × 8
= 30.144 km²
Answer:c
Step-by-step explanation:
c