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3 years ago

If you estimate 3427 by using 3507, is 50 greater than or less than the exact answer?

Mathematics

1 answer:

Leto [7]3 years ago

7 0

50 would be greater than the exact answer.

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You and your friend are standing back-to-back. Your friend runs 16 feet forward and then 12 feet right. At the same time, you ru

Arte-miy333 [17]

Add 16+12 to get 28.
Add 9+12 to get 21.

Think of these as the sides of a triangle.
a^2+b^2=c^2
28^2+21^2=1225
√1225=35

You threw the ball 35 feet.

3 0

4 years ago

If you were asked to convert 75 m/s to km/hr, which conversation factors would you need to use. Select all that apply.

Vilka [71]

Answer:

You need to use A, B, and C.

Step-by-step explanation:

Let's treat the units as variables. I'll illustrate why in a moment.

$75 m/s =\frac{75m}{1s} \\\\\frac{75m}{1s}*\frac{1km}{1000m}=\frac{75m*km}{1000m*s}\\\\\frac{75m*km}{1000m*s}*\frac{60s}{1min}=\frac{(75*60)m*km*s}{1000m*s*min}\\\\\frac{4500m*km*s}{1000m*s*min}*\frac{60min}{1h}=\frac{4500m*km*s*min}{1000m*s*min*h}$

Now, as you can see, we have a giant mess of units to deal with. This is where we can treat the units like separate variables and use a bit of algebra to make our lives easier:

$\frac{4500m*km*s*min}{1000m*s*min*h}=\frac{4500}{1000}*\frac{m*km*s*min}{m*s*min*h}\\\\\frac{4500}{1000}*\frac{m*km*s*min}{m*s*min*h}=\frac{4500}{1000}*\frac{m}{m}*\frac{km}{1}*\frac{s}{s}*\frac{min}{min}*\frac{1}{h}\\\\\frac{4500}{1000}*\frac{m}{m}*\frac{km}{1}*\frac{s}{s}*\frac{min}{min}*\frac{1}{h}=\frac{4500}{1000}*\frac{m*km*s*min}{m*s*min*h}=\frac{4500}{1000}*1*\frac{km}{1}*1*1*\frac{1}{h}\\\\\frac{4500}{1000}*1*\frac{km}{1}*1*1*\frac{1}{h}=\frac{4500}{1000}*\frac{km}{h}\\$

$\frac{4500}{1000}*\frac{km}{h}=\frac{45}{1}*\frac{km}{h}=45 \frac{km}{h}$

So, backtracking through that entire mess, we had to use $\frac{1km}{1000m} ,\frac{60s}{1min} ,\frac{60min}{1h}$ .

These correspond to the options of A, C, and B accordingly.

So you need to use A, B, and C.

8 0

3 years ago

This table represents the monthly fees for checking accounts at two banks.

RUDIKE [14]

The answer is c c is the only right question

8 0

3 years ago

What’s -2*2/5? I got -1/5 but how do i get it out of a fraction?

11Alexandr11 [23.1K]

Answer:

It's actually -4/5 if you are multiplying -2 times 2/5

-1/5 out of a fraction= -0.2

-4/5 out a fraction= -0.8

Step-by-step explanation:

you basically divide the numbers which turns into a decimal

3 0

3 years ago

Find two consecutive even integers who's sum is 34.

aleksklad [387]

Answer:

Step-by-step explanation:

Let the smaller integer be x

x+x+2 =34

2x+2=34

2x=32

x=16

Smaller even integer = 16

Larger even integer = 16+2 = 18

Answer = 16,18

3 0

3 years ago

If you estimate 342*7 by using 350*7, is 50 greater than or less than the exact answer?

If you estimate 3427 by using 3507, is 50 greater than or less than the exact answer?