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kotegsom [21]
3 years ago
8

Substitution method need help for home work

Mathematics
1 answer:
Marizza181 [45]3 years ago
6 0
-3y = x...so we sub in -3y for x in the other equation

-x + 7y = 70
-(-3y) + 7y = 70
3y + 7y = 70
10y = 70
y = 70/10
y = 7

so we sub in 7 for y in either of the original equations to find x
-3y = x
-3(7) = x
-21 = x

so ur solution is (-21,7)
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Can You Please Explain How To Do Problem #10? Thank you! :)​
alexandr1967 [171]

Answer:

separate and square both the top and bottom

the square of square root three is just 3 and the square of  3 (the bottom of the fraction) is 9

so now you have 3(i^2) /9

you can simplify this by three  and then i^2 is -1

you now have -1/3 and thats the final answer

6 0
4 years ago
I have a project, im gonna have to teach someone how M and B in the equation y=mx+b affect the equation of the line.
Luba_88 [7]
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8 0
3 years ago
Help please (will give brainliest)
SpyIntel [72]
Thats 45 degrees! its 45 degrees because if you look at it you just know.
4 0
3 years ago
A navigator marks three locations on a satellite map as shown. If the distance from Serravalle to San Marino is 982 miles, and t
valentina_108 [34]
THE ANSWER 

let be S1 = <span>Serravalle
S2= </span><span>San Marino and 
S3= </span><span>Chiesanuova

for finding the distance </span><span>Chiesanuova from Serravalle,

(distance S1 to  S2)  +  (distance S2 to S3) = </span><span>982 miles + 833 miles =1.815 miles

the answer is </span>B. 1, 815 miles
7 0
3 years ago
Read 2 more answers
Over What Interval is The Function In This Graph Increasing?
irina1246 [14]

The correct answer is option D.which is -4 ≤ x ≤ 1.

<h3>What is a graph?</h3>

A graph is the representation of the data on the vertical and horizontal coordinates so we can see the trend of the data.

in the graph, we can see that the value of x is increasing from -4 coordinate of x to the 1 coordinate of x so the interval will be given as -4 ≤ x ≤ 1.

Therefore the correct answer is option D.which is -4 ≤ x ≤ 1.

To know more about graphs follow

brainly.com/question/25020119

#SPJ1

8 0
2 years ago
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