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sweet-ann [11.9K]
3 years ago
7

Find the solution of this system of two linear equations using substitution 11x+3y=103 and y =3x+1

Mathematics
1 answer:
Lesechka [4]3 years ago
8 0
11x+3y=103 and y=3x+1. 

11x+3(3x+1)=103  -----> plug in (3x+1) for y in the first equation.  You will want to distribute the 3 to the 3x+1 to get something that looks like:

11x+9x+3=103    ------> now you want to combine like terms 

20x+3=103 ---> subtract 3 from both sides
20x=100   ----> divide both sides by 20
x=5    

y=3(5)+1     ---> I like to plug in this to the equation that already has y isolated.  3*5 is 15, add 1 and you find that y=16.

(5, 16) will be your final answer (:
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If the area of a triangle is 48 cm2 and the base of the
makvit [3.9K]

Answer:

8

Step-by-step explanation:

Formula for height of triangle

A÷BX2

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Hope you understand ☺️

4 0
3 years ago
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7 0
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Round the decimal to the nearest hundredths 983.625
r-ruslan [8.4K]
983.625
9 = hundreds
8 = tens
3 = ones
6 = tenths
2 = hundredths
5 = thousandths
You want to round to the nearest hundredths
Look at the number on the right, if it's bigger than 5, round up, if it's 4 or lower, round down.
In this case, the number to the right is a 5, so you round the 2 (hundredths) up one so:
<span>983.63</span>
5 0
3 years ago
Please help this is in my test tomorrow♡
MAVERICK [17]

Answer:

<u><em>67</em></u>

Step-by-step explanation:

<u><em>50-40+87-30</em></u>

=50+(- 40)+87(-30)

=50+87+(-40)+(-30)

=(50+87+(-40)+(-30)

=137+(-70)

=67

<u><em></em></u>

<u><em></em></u>

<u><em></em></u>

<u><em>when he wins, we add points. When he loses ,we subtract points.The score is 50 points. We right  an expression to find the final score </em></u>

5 0
3 years ago
Ashley purchased a prepaid phone card for $25. Long distance calls cost 14 cents a minute using this card. Ashley used her card
OverLord2011 [107]
If we add $0.14 until we get $21.64, we would add it 154.572 times. To check this answer and make sure I’m right, do this equation: 0.14 x 154.572, then you would get 21.64.

The correct answer is 154.572 minutes.
5 0
2 years ago
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