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Archy [21]
3 years ago
5

FOR 12 POINTS I NEED HELP ASAP! Consider the system of linear equations. 5 x + 10 y = 15. 10 x + 3 y = 13 To use the linear comb

ination method and addition to eliminate the x-terms, by which number should the first equation be multiplied? –2 Negative one-half One-half 2
Mathematics
1 answer:
Romashka [77]3 years ago
8 0

Answer:

Do you mean which equation should the 5x+10=15 be multiplied to?

it would be -2

Step-by-step explanation:

This is because 5 times -2 is -10

and so when you add the (now) x value of the first equation to the x value of the second equation, it gets 0

which makes it eliminated!

-10x+10x=0

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Can you do question c for me?
Sveta_85 [38]

Answer:

28.2

Step-by-step explanation:

91 × 18 = 1638

1638 ÷ 58 = 28.2413793103

rounded to 1 significant figure = 28.2 as 4 rounds down

hope this helps

7 0
2 years ago
we said that the ratio of girls to boys in the class was 2:9. if there were 90 boys in the 9th grade, how many girls are there
Juliette [100K]

Answer:

20

Step-by-step explanation:

If the ratio of boys is 9 there are 90 boys. If 9=90 then 1= 10. 10 x 2 = 20

I hope this helps :0)

7 0
3 years ago
Read 2 more answers
HELP ASAP!!!! What is the measure of angle VXY??????
Lelu [443]
Set the two values equal to each other with 18x-2=12x+2 and then plug it in to the equation and solve
6 0
3 years ago
The probability that it will snow in a certain town on January 1st is 0.29 find the probability that in a given year it will not
Mashutka [201]

Answer:

0.71


Step-by-step explanation:

The probability is a chance of an event happening. The probability of assured event is 100% or 1.

If there is no chance of an event happening the probability is zero (0).

The probability of snowing = 0.29

The probability of not snowing = 1 - 0.29

                                                   = 0.71

5 0
3 years ago
Whats the answers can anyone answer this question please​
topjm [15]

Answer:

1. B

2. A

Step-by-step explanation:

1.

10^{-2} means that you move the decimal back two times

B is the only option that represents that correctly.

2.

5 * 10^{4} = 50000

2.5 * 10^{2} = 250

50000/250 = 200

Out of the options, A is the only option in which the equation also equals 200.

4 0
2 years ago
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