Answer:
y = 4x+2
Step-by-step explanation:
slope intercept form is y = mx+b
so we need to solve for y
-4x+y =2
add 4x to each side
4x-4x+y =+4x+2
y = 4x+2
Answer:
9
Step-by-step explanation:
27:
1,3,9, 27
18:
1,2,3,6,9, 18
Set it up like this, going from words on the page to letters and variables:
-3(2x+5) = -57. Twice a number is 2x, increased by 5 is 2x+5, and that is multiplied by -3 to get a total of -57. Distribute the -3 into the parenthesis to get -6x - 15 = -57. Move the 15 over by addition to get -6x = -42. Divide both sides by -6 to get that x = 7
Answer:
a) yes
b) no
c) no
Step-by-step explanation:
a) The percentage change from 12 to 15 is ...
(15/12 -1)·100% = 1/4·100% = 25% . . . . between 20% and 30%
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b) The height increased by 61-52 = 9 inches. 20% of 52 inches is 10.4 inches, so the increase was less than 20%.
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c) The increase was negative, so was not between two positive values.
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In summary ...
a) yes, 25% is between 20% and 30%
b) no, 17.3% is NOT between 20% and 30%
c) no, -33.3% is NOT between 20% and 30%
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A percentage change can be calculated from ...
((new value)/(old value) -1) × 100%
