$82.87. You just add the first three to the starting price and subtract the last one
Set up the equations:
2x+3y=80
1x + 4y = 100
solve for x and y:
1x + 4y = 100
x = 100-4y
plug into first equation
2(100-4y)+3y=80
200-8y+3y=80
y=120/5=24
x = 100-4y=100-96=4
So the charges are (x,y)=(4,24)
So the correct answer (B)
Hey, I am able to help you today :)
Step 1 - Simplify:
420x^2 - 18 = 2082
Step 2 - Add 18 to both sides:
420x^2 = 2082 + 18
Step 3 - Simplify 2082 + 18 to 2100:
420x^2 = 2100
Step 4 - Divide both sides by 420:
x^2 = 2100/420
Step 5 - Simplify 2100/420 to 5
x^2 = 5
Step 6 - Simplify:
x = 5
Step 7 - Check your answer:
10 x 42 x 5 - 18 =2082
Hope this helps you today :)
Step-by-step explanation:
best way to see it check the substitution and the numbering
Answer:
0.12
12%
Step-by-step explanation:
SO to find the ones he did incorrectly, you would subtract 50 and 44. This is 6. He got 6 questions wrong. Now divide 6 and 50. This is 0.12.
So decimal: 0.12.
Percent 12%