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irina1246 [14]
2 years ago
9

Solve the system of equations. 3x – 4y = 8 18x – 5y = 10 X= Y=

Mathematics
2 answers:
ivolga24 [154]2 years ago
5 0
X = 0
Y = -2
You can plug them in just to check if you want
adell [148]2 years ago
5 0

Answer:

X = 0

Y = -2

Step-by-step explanation:

3x = 4y + 8

x = (4y + 8)/3

18 [(4y + 8)/3] - 5y = 10

6(4y + 8) - 5y = 10

24y + 48 - 5y = 10

19y = -38

y = -2 (Plug y into either one of the original formulas.)

18x - 5(-2) = 10

18x + 10 = 10

18x = 0

x = 0  (Check your work to make sure you have correct answers.)

3(0) - 4(-2) = 8

0 + 8 = 8

8 = 8 ;)

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A stack of bricks is 3 1/2 feet high. If each brick is 1 3/4 inches high, how many bricks are in the stack?
Arisa [49]
We have to divide 3 1/2 by 1 3/4:
3 1/2 : 1 3/4 = 7/2 : 7/4 = 7/2 * 4/7 = 2
Answer:
A ) 2 bricks are in the stack. 
8 0
3 years ago
Jasmine buys the magic carpet on sale for $374. She saved $66 off the regular price. What percent was the price discounted?
Furkat [3]

Answer:

15%

Step-by-step explanation:

Let c represent the regular price of the carpet.

Then:  

sale price = regular price less discount

    $374    =           c     -     $66

Adding $66 to both sides isolates (solves for) c:

$374 + $66 = c  =   $440.  This is the regular price.

 $66

---------- = 0.15                      This is the fraction of the regular price by

$440                                   which the regular price is reduced.

Then the percentage of this discount was   0.15(100%) = 15%

8 0
3 years ago
A paper store sells wrapping paper rolls and bags. In the spring, they order a ratio of 3:7 in wrapping paper bags in the spring
Maru [420]

If it can be assumed that the total number paper and bags is the same for both orders, then:

#bags ordered in the spring=7*(150/3)=350, so the total of both is 150+350=500. A 5:5 ratio means that the wrapping paper and bags were bout in equal quantities. That means 500/2=250 for each.

6 0
3 years ago
(NEED THE ANSWER AS SOON AS POSSIBLE)
Naya [18.7K]

Answer: 42 - 8x

Step-by-step explanation:

Here is the complete question:

Jessica had $15. She bought 3 apples for x dollars each. Levi had $27 and bought 5 apples for x dollars each. Which expression represents how much money both Jessica and Levi have left altogether?

Select one:

27 – 5x

42 – 8x

12 – 2x

39 – 3x

From the question, Jessica had $15. She bought 3 apples for x dollars each. This means she had:

15 - (3 × x) = 15 - 3x

Levi had $27 and bought 5 apples for x dollars each. Levi will have:

27 - (5 × x) = 27 - 5x

The amount they'll have altogether will be the addition of their amount left. This will be:

15 - 3x + 27 - 5x

= 15 + 27 - 3x - 5x

= 42 - 8x

5 0
3 years ago
Read 2 more answers
X + 23 = 40 what does "x" equal??? PLz explain
vladimir1956 [14]
Hey there!

40 - 23 = 17

x = 17

Hope this helps
Have a great day (:
6 0
3 years ago
Read 2 more answers
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