Choose the student who wrote and solved the equation correctly.

Mathematics

2 answers:

Alexxandr [17]3 years ago

6 0

Answer:

B i think

Step-by-step explanation:

Monica [59]3 years ago

4 0

Answer:

B Juan's work

Step-by-step explanation:

Got it right on edj 2020

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(05.02 MC)

Elanso [62]

His work should have looked like this.

2x + y = 5
x − 2y = 10

y = 5 − 2x
x − 2(5 − 2x) = 10
x − 10 + 4x = 10
5x − 10 = 10 When he added in both sides, he subtracted 10 from 10,
5x = 20 instead of adding 10 from 10 to make 20.
x = 4
2(4) + y = 5
8 + y = 5

y = -3

4 0

3 years ago

Benny earned $20.00 for weeding the garden. He also earned c dollars for mowing the lawn. Then, he spent x dollars at the candy

vfiekz [6]

Answer:

Step-by-step explanation:

He starts with 20, then ADDS c dollars from earning then SUBTRACTS x dollars by spending.

8 0

3 years ago

Read 2 more answers

Solve each system by elimination by multiplying both equations. eliminate y first. show all work.

Alex17521 [72]

First $\mathrm{Multiply\:}10x-3y=18\mathrm{\:by\:}3:\quad 30x-9y=54$
Then $\mathrm{Multiply\:}6x-10y=-22\mathrm{\:by\:}5:\quad 30x-50y=-110$
To get $\begin{bmatrix}30x-9y=54\\ 30x-50y=-110\end{bmatrix}$
So...
$30x-50y=-110 \ \textgreater \ \begin{bmatrix}30x-9y=54\\ -41y=-164\end{bmatrix}$
$-41y=-164 \ \textgreater \ \mathrm{Divide\:both\:sides\:by\:}-41 \ \textgreater \ \frac{-41y}{-41}=\frac{-164}{-41}$
To get y = 4.
$\mathrm{For\:}30x-9y=54\mathrm{\:plug\:in\:} \:y=4 \ \textgreater \ 30x-9\cdot \:4=54$
$\mathrm{Multiply\:the\:numbers:}\:9\cdot \:4=36 \ \textgreater \ 30x-36=54 \ \textgreater \$
Next $\mathrm{Add\:}36\mathrm{\:to\:both\:sides} \ \textgreater \ 30x-36+36=54+36 \ \textgreater \ \mathrm{Simplify} \ \textgreater \ 30x=90$
Finally $\mathrm{Divide\:both\:sides\:by\:}30 \ \textgreater \ \frac{30x}{30}=\frac{90}{30} \ \textgreater \ x = 3$
Therefore our solutions are y = 4, x = 3

8 0

3 years ago

10 minus the sum of 2 and 3Solution: 33 times the difference of 4 and 2Solution: 5t he difference of 5 and 2, times 3Solution: 7

jek_recluse [69]

I cant even read that normally

5 0

3 years ago

Samsons diner sold 80 milkshakes.25% of the milkshake had whipped cream on top. How many milkshakes with whipped cream were sold

Gemiola [76]

Answer:20 milkshakes

Step-by-step explanation: 80 x 25% =20

25% or 1/4 of 80 is 20 if that makes sense to you.