Answer:
$21
Step-by-step explanation:
15 x 1.4 = 21
Multiply by 1 to keep the original price, plus 0.4 for the 40%
Answer:4.6 × 30= 138
5 × 40= 200
Step-by-step explanation:
Answer:
3.9375
Step-by-step explanation:
2 sides are 6 x 5, 6 x 5 = 30, 30 x 2 = 60
2 sides are 4 x 5, 4 x 5 = 20, 20 x 2 = 40
2 sides are 6 x 4, 6 x 4 = 24, 24 x 2 = 48
total = 60 +40 + 48 = 148 square inches
y = -2x - 9 ----------- 1
y = 3x + 1 -------------- 2
Step 1
Substitute y from equation 1 to equation 2.
y = -2x - 9
3x + 1 = -2x - 9
Step 2
Collect like terms
3x + 2x = - 9 - 1
5x = -10
Step 3
Divide through by 5
x = -10/5
x = -2
Step 4
Substitute x in equation 2 to find y.
y = 3x + 1
y = 3(-2) + 1
y = -6 + 1
y = -5
So the solution is (-2, -5)