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creativ13 [48]
3 years ago
6

The radius of Earth is about 3,980 miles. What expression can be used to find the approximate diameter of Earth?

Mathematics
1 answer:
Tatiana [17]3 years ago
3 0
To find the diameter, you use the formula: 2x. we use 2x because the radius is 2 times the diameter.

so, if the radius is 3,980, then we substitute that into the formula.

2(3,980)

this will give us 7960. the diameter is 7960 miles.
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All 3 triangle angles always add up to 180 degrees.
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5 0
3 years ago
Jacob runs 5 miles in 1 1/2 hours . Robert runs 3 miles in 45 minutes or 3/4 hour. Who runs faster
IgorLugansk [536]

Answer:

Robert

Step-by-step explanation:

If Robert runs 3 miles in 45 minutes, by the end of 90minutes, Robert would have covered 6miles, while Jacob covered 5miles in 90 minutes, therefore, Robert ran faster than Jacob.

5 0
2 years ago
Eight thirds divided by six seventh
Crank

Answer:

I believe it is 16/7 or 2 2/7

3 0
3 years ago
What is an equation of the line that passes through the points (6, -3) and<br> (-6, -5)?
SVETLANKA909090 [29]

Answer:

Step-by-step explanation:

The standard form of an equation for a straight line is y=mx+b, where m is the slope and b is the y-intercept (the value of y when x = 0).

We can calculate the slope from the two given points, (6,-3) and (-6,-5).  Slope is Rise/Run, where Rise is the change in y and Run is the change in x.

From the two given points, starting at (-6,-5) and going to (6,-3):

Rise = (-3 - (-5)) = +2

Run = (6 - (-6)) = 12

Rise/Run (slope) = 2/12 or 1/6

The equation becomes y = (1/6)x + b

We can find b by enterieng either of the two given points and solving for b.  I'll pick (6,-3):

y = (1/6)x + b

-3 = (1/6)*(6) + b

-3 = 1 + b             [Now you can see why I chose (6,-3)]

b = -4

The equation is y = (1/6)x - 4

Check this with a DESMOS graph (attached).

6 0
2 years ago
(show ur work) You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?
vesna_86 [32]

Answer:

8 dollars per pound

Step-by-step explanation:

40 divided by 5 will give you the $/lb

40/5=8 so its $8/lb

3 0
2 years ago
Read 2 more answers
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