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Gwar [14]
3 years ago
15

What is the product of 1.3 and 7.02?

Mathematics
1 answer:
stellarik [79]3 years ago
3 0

Answer:  9.126

Step-by-step explanation:yw

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A plumber charges $130 2 hours of work and $235 for 5 hours of workWhat is the of change in dollars per hour
kogti [31]

Answer:

235

Step-by-step explanation:

Figure the rates per hr.

110/3 = 36 2/3

160/5 = 32.

So, the rates are not the same.

Knowing a bit about plumbers, they normally charge a basic fee to just show up, and then they charge per hr.

In cases like these, where we're asked to project to a new data point (in this case an 8-hr job), you should immediately think of a graph. The x-axis would be the hours worked. The y-axis would be the charge for the work (the cost of the job).

We're given two pairs of values:

(3,110) and (5,160).

The next step is to fit a line to them.

y = mx+b is the general equation for a line.

m = the slope = rise/run = change in y / change in x

Call the change in y, dy (for delta y).

Call the change in x, dx (for delta x).

m = dy/dx = 50/2 = 25

The slope is thus 25, which means for each hour, the price goes up by $25. That means the plumber charges $25/hr.

We also know the plumber charges $110 for a 3-hr job. 3*25 = $75. So the base charge would be $110-75 = $35.

y = 25x + 35

Checking this formula at x=3, we know it is 110.

Checking it at x=5, we obtain:

y = 25*5 + 35 = 125 + 35 = 160.

That checks.

Now to figure an 8-hr job, set x=8 and use the equation"

y = 25*8 + 35.

y = 200 + 35.

y = 235.

That means an 8-hr job costs $235.

3 0
3 years ago
IM DESPERATE
telo118 [61]
You can scan it on brainly, It’ll help you
7 0
2 years ago
HEEEEELP which one is correct?
Nostrana [21]

Answer:

Substitution

3 0
2 years ago
Read 2 more answers
A computer uses 1/200 second of a secount to finish a math problem . How many math questions can the computer solve in 2 minutes
aniked [119]

Answer: The computer can solve 24,000 math problems in 2 minutes.

Step-by-step explanation:

1.) Multiply 1 * 200, in order to get the amount of problems solved in a second, which would be 200.

2.) Multiply 200 * 60 to get the amount of problems solved in a minute, which would be 12,000.

3.) Multiply 12,000 * 2 in order to get the amount of problems solved in 2 minutes, which would be 24,000.

4 0
3 years ago
Shelby paid $1.75 for a notebook at a big 75% off sale. What was the original price of the notebook?
Shkiper50 [21]

Answer:

$7.00

Step-by-step explanation:

The discount is 75% off.  To answer this question, multiply n (the original price) by (1.00 - 0.75):  0.25n = $1.75.

Solving this for n, we get $7.00

3 0
3 years ago
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