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Sliva [168]
3 years ago
12

Solve the system of equations by substituion, -5x + y = 3 7.5x - 1.5y = 3

Mathematics
1 answer:
Naya [18.7K]3 years ago
5 0
The first equation, make the y as the subject. y = 3 + 5x, then substitute y in the second equation and you will get the value of x. then, substitute the x in the first equation (y = 3 + 5x)
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50 POINTS: Please help thank you so much!! (Image attached) The polygons are similar. Find the values of the variables.
BlackZzzverrR [31]

Step-by-step explanation:

9 + y^2 = 49

y^2 = 40

y = √40 = 2√10

4.5/3 = 2√10/5x

22.5x = (3) 2√10

22.5x = 6√10

x = 6√10/22.5 = 3√10/11.5

7 0
2 years ago
For each of the following research scenarios, decide whether the design uses a related sample. If the design uses a related samp
Wewaii [24]

Answer:1. uses a related sample - repeated measures

2. . does not use a related sample--a

Step-by-step explanation:

Question 1.

step1  A repeated measure design is a design which measures a given sample repeatedly over a given time using different conditions or related measures.

step 2:In the treatment for compulsive hoarding, Here, measures are taken two times ie before and after treatment on the same 50 hoarders which shows a repeated measure, also the design is a within related sample of the same 50 hoarders to give measurement at different conditions  of treatment for  high and low hoarding scores so the design describes  a related sample - repeated measures

Question 2:

step 1 ; An unrelated sample  occurs when Samples being measured do not depend on each other  

Step 2;  1st Sample for comparison by John are random lonely people  and Second Sample are random non lonely people. so the two samples are independent on each other and will give different  measurement based on quality of sleep.   So the design does not use a related sample

8 0
2 years ago
Find the value of x in the following figure
loris [4]
I think it’s 90 just add them up the subtract 180




4 0
2 years ago
Can someone help me find the missing side length!
aev [14]

Answer:

12

Step-by-step explanation

so what I did is I divided 15 by 5 to get 3 also 9 divided by 3 equals 3 to so you could of also done that.

then i multiplied to 4 x 3 to get the missing side length which equals 12

6 0
2 years ago
Read 2 more answers
Sole <br> x/5 = 10<br> 1.x=50 2.x=2 3.x=15 4.x=5
Anarel [89]
The answer is 1.
( x = 50)
3 0
3 years ago
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