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AlladinOne [14]
3 years ago
9

Yan is running on a track that is of a km long. She can run 4 laps in 12

Mathematics
1 answer:
sashaice [31]3 years ago
7 0

Answer:

3 km per minute

Step-by-step explanation:

12/4=3 laps

3 km per minute

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A box with an open top has vertical sides, a square bottom, and a volume of 256 cubic meters. If the box has the least possible
OLEGan [10]

Step-by-step explanation:

Below is an attachment containing the solution.

4 0
3 years ago
The variable z is inversely proportional to x. When x is 16, z has the value 0.875. What is the value of z when x= 21?
ziro4ka [17]
For z and x to be inversely proportional, there must be some constant k such that

zx=k

Given that z=0.875 when x=16, it follows that

0.875\cdot16=k\implies k=14

Then when x=21, we have

21z=14\implies z=\dfrac{14}{21}=\approx0.667
8 0
3 years ago
which equation represents a line parallel to the line whose equation is -2x+3y=-4 and passes through the point (1,3)?
sammy [17]

The slope of the line has to be the same the the equation given to be parallel.

The slope of the line given is... 2/3.

If the line passes through point (1,3) then...

3=2/3(1)+b

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answer: y=2/3x+2 1/3

4 0
3 years ago
Read 2 more answers
15 points please help!! :)<br> Find the value of x.
andriy [413]

Answer:

Question 4: -11

Question 5: -7

Step-by-step explanation:

Four

Every triangle has 180 degrees.

So all three angles add to 180

<em><u>Equation</u></em>

60 + 80 + x + 51 = 180

<em><u>Solution</u></em>

Combine the like terms on the left. This is the first time I've seen x be a negative value. Almost all of the time it isn't, which should make you wonder.

191 + x = 180    

Subtract 191 from both sides.

191 - 191 + x = 180 - 191

x = - 11

Five

If a triangle is a right triangle and one of the angles is 45, then so is the other one.

<em><u>Proof</u></em>

a + 45 + 90 = 180         Combine like terms on the left

a + 135 = 180                Subtract 135 on both sides.

a + 135-135=180-135    Combine the like terms

a = 45

<em><u>Statement</u></em>

That means 52 + x = 45 and here is another negative answer. Subtract 52 from both sides

52 - 52 + x = 45 - 52    Combine like terms.

x  = - 7

6 0
3 years ago
Read 2 more answers
Write the answer in numeric form?
kondor19780726 [428]

Answer:

x=11. 38 degrees; 52 degrees

Step-by-step explanation:

90+6x-14+3x+5=180

81+9x=180

9x=99

x=11

38 degrees, 52 degrees

8 0
3 years ago
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