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grandymaker [24]
3 years ago
6

Solve the equation 7h-5(3h-9)=-72

Mathematics
2 answers:
Pavlova-9 [17]3 years ago
7 0
7h-5(3h-9)=-72

7h-15h+45=-72

-8h+45=-72

-8h+45-45=-72-45

-8h=-117


-8h/-8=-117/-8
h=117/8 
Hope this helps :)
STALIN [3.7K]3 years ago
3 0
H=14 is your answer.

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Seiji and Gavin both worked hard over the summer. Together they earned a total of $450. Gavin earned $30 more than seiji.
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Answer:

(a) s+g=450\\g=s+30

(b) The graph is shown below.

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Step-by-step explanation:

Given:

Sum of earnings of Seiji and Gavin = $ 450

Gavin earns $ 30 more that that of Seiji.

(a)

So, as per question, if s and g are the amounts earned by Seiji and Gavin respectively, then;

s+g=450\\g=s+30

(b)

The graph is plotted using the x and y intercepts of each line.

For the line, s+g=450, the x intercept is at g=0. So, x intercept is (450,0). Similarly, the y intercept is when s=0, which is (0,450). Draw a line passing through these two points. The red line represents s+g=450.

We follow the same process to plot the next line. The x intercept is at (-30,0) and y intercept is at (0,30). Draw a line passing through these two points. The blue line represents g=s+30.

The graph is shown below.

(c)

From the graph, the point of intersection of the two lines gives the earnings of each of the persons.

The x value of the point of intersection is the earning of Seiji which is $ 210 and the y value is the earning of Gavin which is $ 240 as shown in the graph.

Therefore, Seiji earned $ 210 and Gavin earned $ 240.

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