Answer:
x = 12
Step-by-step explanation:
(6x-2) + 20 = 90
6x-2 = 70
6x = 72
72 / 6 = 12
x = 12
Hi Brainiac
y=2x-3
y= 2x+5
Ok we need to solve y=2x-3 for y
Now substitute 2x-3 for y in y=2x+5
y=2x+5
2x-3=2x+5
Add -2x
2x-3-2x=2x+5-2x
-3=5
Add 3
-3+3=5+3
0=8
No Solutions
I hope that's help:0
Answer:
10 +(20x)
Step-by-step explanation:
Donald has number of twenty-dollar bills = x
He has ten-dollar bill = 1
Total amount of bills = 10 +(20x)
The amount of the bill that Donald have is 10 + (20x)
Answer:
Step-by-step explanation:
Let x represent the cost of one white chocolate pretzel.
Let y represent the cost of one dark chocolate pretzel.
Rico bought 4 white chocolate pretzels and 6 dark chocolate pretzels for $10.50. This means that
4x + 6y = 10.5 - - - - - - - - - - -1
Holden bought 8 white chocolate and 3 dark chocolate pretzels for $9.75. This means that
8x + 3y = 9.75 - - - - - - - - - 2
Multiplying equation 1 by 8 and equation 2 by 4, it becomes
32x + 48y = 84
32x + 12y = 39
Subtracting, it becomes
36y = 45
y = 45/36 = $1.25
Substituting y = 1.25 into equation 1, it becomes
4x + 6 × 1.25 = 10.5
4x + 7.5 = 10.5
4x = 10.5 - 7.5 = 3
x = 3/4 = $0.75
the total cost for 6 white chocolate pretzels and one dark chocolate pretzel would be
6 × 0.75 + 1 × 1.25 = 4.5 + 1.25 = $5.75
Answer:
2/7 of the waffles did not have blueberries or chocolate chips.
Step-by-step explanation:
So first, it says 4/7 were blueberry, and 1/7 were chocolate chip. When you add them two you get 5/7. The denominator is 7, so subtract 7 from 5 and you get 2, 2/7. 2/7 of the waffles did not have blueberries or chocolate chips.