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Aneli [31]
3 years ago
14

Solve each equation. #8. 8z = 112

Mathematics
1 answer:
Lynna [10]3 years ago
6 0
#8 Z=14
#9 D=98
#10 F=622
# 11 A=27
I hope this helps!!
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Without drawing the graphs, find the points of intersection of the lines: a 7x+4y=23 and 8x–10y=19
emmainna [20.7K]

Answer:

(3,0.5)

Step-by-step explanation:

The given system has equations:

7x + 4y = 23 \\ 8x - 10y = 19

Let us multiply the second equation by 4 and the first equation by 10.

70x + 40y = 230 \\ 32x - 40y = 76

We add both new equations to get:

102x = 306 \\ x =  \frac{306}{102}  = 3

Put x=3 into the first equation and solve for y.

7(3) + 4y = 23 \\ 21 + 4y = 23 \\ 4y = 23 - 21 \\ 4y = 2 \\  y =  \frac{1}{2}

The point of intersection is the solution to the system of equation which is (3,0.5)

8 0
3 years ago
John works as a tutor for an hour and as a waiter for an hour. This month, he worked a combined total of hours at his two jobs.
liberstina [14]

Correct Question:

John works as a tutor for $12 an hour and as a waiter for $8 an hour. This month, he worked a combined total of 86 hours at his two jobs.

Let be the number of hours John worked as a tutor this month. Write an expression for the combined total dollar amount he earned this month.

Answer:

Total hours = 86

Let t is the hours he spent on tutoring

then (86-t) is hours spent on waiting

Let Y is the total amount in dollars which is required .

Now;

y = (tutoring hours x 12$) + (waiting hours x 8$)

Y = 12t + 8(86-t)

6 0
3 years ago
36% of what number is 18?
34kurt
18 * 100 / 36 = 200

<span>36% of 50 is 18</span>
7 0
2 years ago
Read 2 more answers
Please need help on this!
GrogVix [38]
F(x) = x(x -1)

f(3) = 3*2 = 6
f(6) = 6*5 = 30

so f(f(3)) = 30 . . . . . selection A
8 0
3 years ago
Help me or I’ll mark Brainly I just need a couple of answers finished
Olin [163]

Answer:

4. 72 m

5. 42 m

6. 66 yd

8. 18 yd

9. 200 cm

8 0
2 years ago
Read 2 more answers
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