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Murljashka [212]
3 years ago
10

If z = 12.8, what is the value of 2(z - 4)? [Type your answer as a number.]

Mathematics
2 answers:
Y_Kistochka [10]3 years ago
8 0
So when evr you have a number outside of parenthense you mulitply

12.8 = z

12.8z - 4= 8.8

8.8 x 2=17 . 6
Anna35 [415]3 years ago
7 0
17.6 is your answer 

Hope this helps!!
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Find the solution of this system of equations. Separate the x- and y- values with a comma. x-2y=-24 and x-y=4
defon
X - 2y = -24
x - y = 4

Isolate x in the first equation by adding 2y to both sides.
x = -24 + 2y  

Now plug in this value of x into the second equation.
(-24 + 2y) - y = 4
Solve. Combine all like terms, 2y - y.
-24 + y = 4
Add 24 to both sides to isolate y.
y = 28

Now plug y back into the first equation to find x.
x - 2(28) = -24
x - 56 = -24
Add 56 to both sides to isolate x.
x = 32

The solution is (32, 28).
6 0
3 years ago
A total of 815 tickets were sold for the school play. They were either adult tickets or student tickets. There were 65 more stud
kvv77 [185]

Answer:

<u>375 Adult Tickets.</u>

Step-by-step explanation:

Here, we can simply set up an equation using variable <em>x </em>in place of the unknown student/adult tickets.

x = # of <u>adult</u> tickets sold

x + 65 = # of <u>student</u> tickets sold.

1) x + x + 65 = 815 (set both ticket amounts equal to the total)

2) 2x + 65 = 815 (added common variables together)

3) 2x = 750 (negated the +65, subtracted it from both sides)

4) x = 375 (divided both sides by 2)

5) 815 - 375 = 440 (subtracted the x from the total number of <u>adult</u> tickets, to recieve the amount of <u>childrens</u>' tickets.

Therefore,

Since there were fewer adult tickets sold (-65), 375 is the number of adult tickets, and 440 is the number of student tickets.

5 0
2 years ago
Consider the equation 4+2(5x-8) = ax +b.
vlada-n [284]

Answer:

a = 10, b = -12

Step-by-step explanation:

4+2(5x-8) = ax +b

4 + 10x - 16 = ax + b

10x - 12 = ax + b

Infinitely many solutions when:

a = 10

b = -12

5 0
3 years ago
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Gnesinka [82]
He's a silly goober and he likes to joke around
6 0
3 years ago
Ariana and tom Tabitha recorded the amount of time spent on homework on 10 school daze graph of the data are shown
Sedaia [141]

Answer:

theres no picture

Step-by-step explanation:

5 0
3 years ago
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