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Arlecino [84]
4 years ago
15

Solve the system or equations by substitution y= 3 2x- y = 7

Mathematics
2 answers:
allochka39001 [22]4 years ago
8 0
Answer: -5
2x=7+3
-2x=10
X=-5
Rzqust [24]4 years ago
8 0
Answer: x= 7/2+y/2

explanation: u have to move all the terms that don’t contain X to the right then solve
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What is 1.015873015873016 to the nearest tenth
AnnZ [28]
1.015873015873016 to the nearest tenth is 1.02. The tenth place is the second number to the left of the decimal and you would round up because the third number is at least five.
I hope this helps!
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3 years ago
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Pls help this is due in soon!!
Rasek [7]

Answer:

48

Step-by-step explanation:

6 0
3 years ago
How do I do this? Please provide steps.
matrenka [14]

Answer:

3/5

Step-by-step explanation:

Soh Cah Toa

In some trigonometry classes, this acronym is very important to solving questions like this.

Why?

It tells us the right triangle-definition of these trigonometry functions.

We have that cosine of an angle is equal to tge side that is adjacent to it over the hypotenuse.

So here we are asked to find cos(B).

Lets look at triangle respect to the angle B

The measurement of the side that is opposite is 64.

The measurement of the side that is adjacent is 48.

The measurement of the hypotenuse is 80.

So cos(B)=48/80.

Let's reduce. 48 and 80 have a common factor of 8 so divide numerator and dexter by 8. This gives us:

cos(B)=6/10.

One more step in reducing. Both factors are even so cos(B)=3/5.

6 0
3 years ago
How many blank pages remain
Ierofanga [76]
B) 14. 

If you start with subtracting the 8 pages from 50, you get 42 remaining pages. Then it says 2/3 of the REMAINING pages so you divide 42 into thirds. 42/3=14. You want 2/3 of that, so you multiply the 14 by two to get 28 (it's like there are three piles of 14 pages and you want only 2 out of the three piles). So now you've used 28 pages + the original 8. You've used a TOTAL of 36 pages. Subtract 36 from 50 and you get 14 left. 
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Galina-37 [17]

Answer:

√ -4

Step-by-step explanation:

all square roots of negative numbers are irrational

6 0
3 years ago
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