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Marat540 [252]
3 years ago
12

A boat travels 21 miles due north and then 28 miles due east. Then the boat travels in a straight line back to its starting poin

t. What was the straight line distance of the boat to its starting point?
Mathematics
1 answer:
Aneli [31]3 years ago
3 0
21²+28²=c²
√1225=c
35 miles - distance of the boat to its starting point
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No idea how to do this equation. Its applying system's of linear equations.
icang [17]
What you want to do is take one of the 2 equations and isolate one variable. you will then use the value that you find for the variable and plug it back into the other equation. here is how:

This would be easiest to do with the second equation in the set since the x is not being multiplied by anything. So lets isolate the x in the second equation.

add 0.9y to both sides and you get:

x=4.5+0.9y

we now know what x is equal to in terms of y. so lets replace the x in the first equation with the new value. You get:

1.5(4.5+0.9y)-1.9y=-29

Now just solve for y:
6.75+1.35y-1.9y=-29
1.35y-1.9y=-35.75
-0.55y=-35.75
y=65

so now you know that y=65 so plug 65 in as y in the second equation to find x

x-0.9*65=4.5

Now simply solve for x

x-(-58.5)=4.5
x+58.5=4.5
x=-54

Hope this helped! :)



3 0
3 years ago
What is the product? [3 6 1 2 4 0 0 6 2] x [2 0 1]
IRISSAK [1]

Answer:

361,240,062 X 201= [72609252462]

Step-by-step explanation:

3 0
3 years ago
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The function A=A_oe^{-0.01155x} A = A o e − 0.01155 x models the amount in pounds of a particular radioactive material stored in
vivado [14]

They are essentially asking us to solve:

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Solving this equation for x tells us that it will take around 80.1 years for the materials in the vault to reduce to 357 pounds.

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We are told that Printer A prints faster than Printer B, so Printer B must have a lower rate of printing than Printer A. The equation for Printer B must have a slope less than 4.25.

There are two choices which have a slope less than than 4.25.

Answer: y = 4.2x; y = 4x

3 0
3 years ago
Help please thank you!
Maslowich

the error is that they didnt add the exponets

6 0
3 years ago
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