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creativ13 [48]
3 years ago
7

A can do a piece of work in 10 days and B in 12 days.

Mathematics
1 answer:
enot [183]3 years ago
3 0

Answer:

B. 15 days

Step-by-step explanation:

A=10=1/10 of the job

B=12=1/12 of the job

A+B+C=4=1/4 of the job

A+B

=1/10 + 1/12

=10+12/120

=22/120

=11/60

(A+B+C) - (A+B)

=1/4 - 11/60

=5 - 11/60

=4/60

=1/15

It would take C alone 15 days to finish the job

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A line includes the points (0, –6) and (–2, –10). What is its equation in slope-intercept form?
sergiy2304 [10]

Answer:

y = 2x - 6

Step-by-step explanation:

The slope-intercept equation is y = mx + b

where m is the slope and b is the point on the y axis when x=0 which is called the y intercept.

The slope is the rise over run.

Rise is the difference in the y values.

Run is the difference in the x values.

Rise = difference between -6 and -10  which is 4 units

Run = difference between 0 and -2 which is 2 units.

The slope would then be 4 over 2 or 4/2 which can be reduced down to 2.

If you visualize the line on the graph, the line slopes upward from left to right.  So the slope must be a positive number.

Slope = 2

The y intercept is when x=0.  One of the coordinates (0, -6) gives you that answer.  When x=0, y = - 6.  This is b.

Your equation would be y = 2x - 6

7 0
3 years ago
Read 2 more answers
Help pleaseeee i don’t know
marissa [1.9K]

Answer:

C, at least that's what I think.

6 0
3 years ago
Help me with this. 30 points. Don't put bad answer please.
Bond [772]

Answer:

The answer is A

Step-by-step explanation:

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Thx

5 0
3 years ago
Please help! I need answers in begging !
Levart [38]

Answer:

2866

Step-by-step explanation:

10000-7134=2866

so 7134+2866=10000

7 0
3 years ago
What the surface area of the regular square pyramid?is (Figure is not drawn to scale.)7 cm9 cm A) 120.5 cmo B) 144 cm C) 207 cm
Sindrei [870]
The answer is C. 207 cm. The formula to find the area of a triangle is 1/2 base times height. So the base is 9cm and the height is 7cm. Multiply them and you get 63, but you have to divide by 2 because the formula so you get 31.5 cm. Multiply that by 4 because there are four triangles. So you get 126 cm. Then to find the area of the square, you do s times s. Side times side so 9 times 9 is 81. Add the 81 and 126 together and your answer is 207. hope i helped ya!!
6 0
3 years ago
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