Answer 5x6+
Step-by-step explanation:
Answer:
{x,y} = {2,7}
Step-by-step explanation:
// Solve equation [1] for the variable y
[1] y = -4x + 15
// Plug this in for variable y in equation [2]
[2] 3x + 5•(-4x+15) = 41 [2] -17x = -34
// Solve equation [2] for the variable x
[2] 17x = 34 [2] x = 2
// By now we know this much :
x = 2 y = -4x+15
// Use the x value to solve for y
y = -4(2)+15 = 7
Answer:
1) 10
2) 9
Step-by-step explanation:
50+35=5(10+7) because 5*10=50 and 5*7= 35
9+39=3(3+13) because 3*3=9 and 3*13=39
Answer:
area = 301.44 in²
Step-by-step explanation:
area of top and bottom = π4² = 50.24 each, 100.48 in² for both
circumference = π2r = π2(4) = 25.12
25.12 x 8 = 200.96 in² area of side
100.48 + 200.96 = 301.44 in²
Answer:
R=-12
Step-by-step explanation:
6(1 + 3R) = 2(10R - 9) -4R
Distribute 6 through the parentheses
6+18R=2(10R-9)-4R
Distribute 2 through the parentheses
6+18R=20R-18-4R
Collect like terms
6+18R=16R-18
Move the variable to the left-hand side and change its sign
6+18R-16R=-18
Move the constant to the right-hand side and change its sign
18R-16R=-18-6
Collect like terms
2R=-18-6
Calculate the difference
2R=-24
Divide both sides of the equation by 2
R=-12
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