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Andrew [12]
3 years ago
5

The interior angles of a triangle measures 180? True or false

Mathematics
1 answer:
Ymorist [56]3 years ago
8 0
 it is true because al triangles angles MUST add up to  180
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Two workers finished a job in 12 days. How long would it take each worker to do the job by himself if one of the workers needs 1
Lorico [155]

Two workers finished a job in 7.5 days.

How long would it take each worker to do the job by himself if one of the workers needs 8 more days to finish the job than the other worker?

let t = time required by one worker to complete the job alone

then

(t+8) = time required by the other worker (shirker)

let the completed job = 1

A typical shared work equation

7.5%2Ft + 7.5%2F%28%28t%2B8%29%29 = 1

multiply by t(t+8), cancel the denominators, and you have

7.5(t+8) + 7.5t = t(t+8)

7.5t + 60 + 7.5t = t^2 + 8t

15t + 60 = t^2 + 8t

form a quadratic equation on the right

0 = t^2 + 8t - 15t - 60

t^2 - 7t - 60 = 0

Factor easily to

(t-12) (t+5) = 0

the positive solution is all we want here

t = 12 days, the first guy working alone

then

the shirker would struggle thru the job in 20 days.

8 0
2 years ago
Read 2 more answers
in Ryan's V. Class 50% of the students like the teacher if 15 of the students like the teacher how many students are in that cla
Anton [14]

Answer: 30 students.

Step-by-step explanation: They are saying 50% of the class like the teacher. We know that 50% is half of the 100% so that mean only half of the students like the teacher. Is 15 students like the teacher it means that 15 are half of the students in the class. The other half should be another 15. So 15+15=30 or 15x2=30.

I hope I didn’t make it to confusing.

6 0
3 years ago
OLZ HELP ILL MARK AS BRAINLEST​
Airida [17]

Answer:

-2

Step-by-step explanation:

The slope is rise over run. If we look at the points we can see the rise is -2 and the run is 1. -2/1 = -2, so my answer is correct.

4 0
2 years ago
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dimaraw [331]

Answer:

Negative 23 time negative 38 equals 552 because negative times negative gives positive

552 times 89 gives 49128

Step-by-step explanation:

4 0
2 years ago
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What is the y-intercept of the graph of the function f(x) = x2 3x 5?.
Fiesta28 [93]

Answer:

f(x) =x2 3x 5?

c = 5

therefore the solpe = 5

3 0
2 years ago
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