x/2 - 5 =3
add 5 to each side. this is the addition property of equality
it says when we add the same thing on both sides of the equation, we are not changing the value of the equation
we are using this to get the variable on one side and the constant on the other
x/2 -5+5 = 3+5
x/2 =8
multiply each side of the equation by 2
we are using the multiplication property of equality
it says when we multiply each side of the equation by the same thing, we are not changing the value of the equation
x/2 *2 = 8*2
x = 16
Answer:
days ≤ 6
Step-by-step explanation:
she gas 160 pages out of the 380 pages, so she needs to write other:
380 - 160 = 120 pages.
If she writes a minimum of 20 pages per day, then the maximum number of days in which she will finish the book is:
20*d = 120
d = 120/20 = 6
so d is the number of days, and we have that:
d ≤ 6.
The equality is when she only writhes 20 pages per day, and if she writes more than that, then the number of days needed will be smaller than 6.
Answer:
A = -9, B = 65
Step-by-step explanation:
Take the square root of both sides of the equation:
h + 9 = ±√65
Subtract 9 from both sides of the equation:
h = -9 ± √65
Comparing this to the form
h = A ± √B
we see that A = -9 and B = 65.
_____
A lot of math is about matching patterns of numbers and variables. Here, you're asked to match the expression -9±√65 to the pattern A±√B and identify the values for A and B that make these expressions identical.
It should not be difficult to see that the stuff on the left side of ± is the value of A. That stuff is -9.
The stuff under the radical is the value of B. That stuff is 65.
Answer:
15/2 = 7.5
20/2 = 10
10 x 7.5 = 75
75 is the answer!!!!!
Step-by-step explanation:
i tried to help.. i couldn't see the whole question