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trapecia [35]
3 years ago
15

-72 by 8 A) -9 B) -8 C) 7 D) 8

Mathematics
2 answers:
monitta3 years ago
8 0

<u><em>Hi there! :) :D</em></u>

<u><em>Answer:</em></u>

<u><em>A. -9</em></u>

<u><em>*The answer must have a negative sign.*</em></u>

Step-by-step explanation:

Lesson: Dividing integers

First, you divide by the numbers from left to right.

72/8=9

It change positive to negative sign.

72/9=8

Then, you can also multiply by the numbers from left to right.

9*8=72

8*9=72

<u><em>Final answer is -9</em></u>

Hope this helps!

Have a nice day! :)

:D

-Charlie

Thank you so much! :)

:D

Gekata [30.6K]3 years ago
7 0
-9
9 times 8 is 72 its negative ultimately the same thing (easy way to look at it) with a dif sign
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5 men can complete a job in 4 days. In how many days can 10 men working at 1/4 of the previous rate complete the job?​
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The answer is 8 days
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8. A carpenter balances his daily projects between small jobs (x) and building cabinets (y). He allots 2
garik1379 [7]

Answer:

\$1125

Step-by-step explanation:

The equations of the system are

2x+4y\leq 12

y\geq 0

0

From the graph it can be seen that points (3,1.5) and (3,0) falls in the bounded region.

The income will be

125x+500y=125\times 3+500\times 1.5\\ =\$1125

125\times 3+500\times 0=\$375

So, the person can do 3 small jobs and build 1 and a half cabinets per day.

The maximum income will be \$1125.

4 0
3 years ago
Finn is baking a pie. The diameter of the pie is 14 inches.
Gennadij [26K]

Answer:

If you round it to nearest tenth it will be 50

Step-by-step explanation:

14x3.14=49

6 0
3 years ago
A point x is 34m due to east of a point Y . The bearing of a flagpole from x and Y are N18°W And N40°E respectively .
Murljashka [212]

Answer:

The distance of flag post from Y is 38.13 m

Step-by-step explanation:

Consider point Y at the intersection of both lines as shown below. Now the point X lies 34 meter from point Y in east direction.  

Now flag pole at point X lies at a bearing of N18°W. That is at point X from north, flag post makes an angle of 18° towards west.  

Similarly flag pole at point Y lies at a bearing of N40°E. That is at point Y from north, flag post makes an angle of 40° towards east.  

Consider ∆ AXY as right angle triangle. Therefore measure of angle FXY is,  

\angle AXY=\angle AXF+\angle FXY

\therefore 90 \degree=18\degree+\angle FXY

\angle FXY=72\degree

Consider ∆ BYX as right angle triangle. Therefore measure of angle FYX is,  

\angle BYX=\angle BYF+\angle FYX

\therefore 90 \degree=40\degree+\angle FYX

\angle FYX=50\degree

Refer attachment 1.  

From diagram consider the triangle FYX. To find the third angle that is ∠YFX can be calculated by using angle sum property of triangle.

∠YFX+∠FYX+∠FXY=180°

∠YFX+50°+72°=180°

∠YFX=58°

Refer attachment 2.  

Now the distance FY can be calculated using sin rule as follows,  

\frac{\sin X}{FY}=\frac{\sin F}{YX}=\frac{\sin Y}{FX}

Substituting the values,

\frac{\sin 72}{FY}=\frac{\sin 58}{34}=\frac{\sin 50}{FX}

Simplifying first two terms,

\frac{\sin 72}{FY}=\frac{\sin 58}{34}

Cross multiplying,

34\times\sin 72=FY\times \sin 58

\dfrac{34\times\sin 72}{\sin 58}=FY

FY=38.13 m

7 0
3 years ago
Persons taking a 30-hour review course to prepare for a standardized excam averago a score of 620 on that exam. Persons taking a
wolverine [178]

Answer:

S(t) = 4.725t + 478.25

S(t) = 4.725(42)+478.25

S(t) = 676.7

Step-by-step explanation:

In the question, score is a function of time, that means time is the x-axis, while score is the y-axis.

Order the pairs to get:

(30,620) and (70, 809)

With these values, you use the the equation \frac{x2-x1}{y2-y1} to get the slope m.

\frac{70-30}{809-620}  = 4.725

Use this equation and input any ordered pair to get the final function.

y-y1 = m(x-x1)

y-620 = 4.725x-141.75

y = 4.725x + 478.25

Replace x with t and y with S(t) to fit the x & y axis of the question.

6 0
3 years ago
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