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Bess [88]
3 years ago
14

Solve the system of linear equations by substitution

Mathematics
1 answer:
ziro4ka [17]3 years ago
6 0

y - x = 0  ...equation 1
2x - 5y = 9 \: ...equation  \: 2
working with equation 1
y = x \: ...equation \:  3
next subsitue equation 3 in equation 1
2x - 5(x) = 9
2x - 5x = 9
- 3x = 9
divide by -3
x =  - 3
substitute x= -3 in equation 1
y - ( - 3) = 0
-(-3) = + 3
y =  - 3

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34% of 65. Do not round!!! pls help
anastassius [24]

Answer:

22.1

Step-by-step explanation:

If we put 65 over 100 and x over 34 and do cross multiplication, we see that 65 times 34 is 2,210. Dividing 100 from both sides of the equation, we divide 100 from x and 100 from 2,210. We are left with X = 22.1

6 0
3 years ago
Read 2 more answers
Margo missed 24.6% of the free throw shots in a season During the season she took a total of 90 free throw shots. Which, of the
adoni [48]

Answer:

  C.  22

Step-by-step explanation:

The problem statement tells you ...

  missed = 24.6% × 90

  = 0.246 × 90 = 22.14

The best estimate among the answers given is 22, choice C.

_____

<em>Comment on the problem statement</em>

The percentage given is supposedly computed from the number of shots attempted and missed <em>this season</em>. The ratio 22/90 would give a percentage rounded to 24.4%, not 24.6%.

24.4% of 90 is 21.96, closer to 22.

7 0
3 years ago
Rebecca is a Texas resident and she plans to attend Texas Tech for all 4 years of college. She has a yearly scholarship of $10,0
andrezito [222]

Answer:

To complete the required $m dollars for her college, she needs $(m - 60,000).

Step-by-step explanation:

Suppose Rebecca needs $m to complete her college education,

because she has a yearly scholarship of $10,000, she would have $10,000 × 4 = $40,000 for the four years she would spend in college.

Together with her savings of $20,000, she has $20,000 + $40,000 = $60,000 in total.

Therefore to complete the required $m dollars for her college, she needs $(m - 60,000).

5 0
3 years ago
8
alexgriva [62]

Answer:I believe is 66 days

because we

48,36,18

36-18=18

48-36=12

so the next moviewill be 48+12=66 days

Step-by-step explanation:

7 0
3 years ago
I need help is due in 20 minute
AfilCa [17]
A is 5 , b is 1 , c is 4 , d is 3, and E is 2
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