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ruslelena [56]
3 years ago
5

-5(7+2y)+15(x+2y); x=7 and y=-7

Mathematics
1 answer:
AysviL [449]3 years ago
8 0

Answer:  -5(7+2(-7))+15((7)+2(-7)) = -70

im not sure

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Marco does 14 extra math problems each school night how many extra problems does he do each week. there are 5 school nights in a
Alexus [3.1K]
Marco does 70 extra math problems each week. 14(5)=70 
4 0
3 years ago
Read 2 more answers
Three times a number minus thirty-two
lbvjy [14]

Answer:

3n−32=7n+28

n=-15

Step-by-step explanation:

Let's solve your equation step-by-step.

3n−32=7n+28

Step 1: Subtract 7n from both sides.

3n−32−7n=7n+28−7n

−4n−32=28

Step 2: Add 32 to both sides.

−4n−32+32=28+32

−4n=60

Step 3: Divide both sides by -4.

−4n/−4=60/−4

n=−15

3 0
3 years ago
Need help with 7-10 please and thank you!!
Archy [21]

Answer:

#7: MK, LS and PR

#8: PN and PQ

#9: no

#10: no

Step-by-step explanation:

#7: lines MK, LS and PR are not intersecting each other, so these lines are parallel each other

#8: between lines PN and PQ is an right angle, so the lines PN and PQ are perpendicular

#9: lines PN and KM have an intesecting point, so they're not parallel

#10: there is no right angle between lines PR and NP

3 0
3 years ago
MR. ARCEO TAKES A TAXI FROM THE AIRPORT TO A HOTEL. THE TAXI CHARGES $2.50 INITIAL CHARGE PLUS $2.65 PER MILE. WHICH EQUATION CA
enyata [817]
2.65x + 2.50 = y

step by step explanation:

2.65 is how much for each mile, and the variable, x, represents the number of miles of the trip. so, we would do 2.65x to find out how much money you have to pay for the amounts of mile.

next, you would have to add the initial fee, which is 2.50. so 2.65x+2.50.

lastly, y represents the total cost of the trip. so, 2.65x + 2.50 = y
7 0
3 years ago
The price of a refrigerator is Rs 66,400 after including GST at the rate of 17% . what is the amount of GST.
Elden [556K]
<h3>Answer:</h3>

The amount of GST is Rs 9,647.87

Step-by-step explanation:

<h2>Given :</h2>

• The price of a refrigerator = Rs 66,400

• Price including GST

• Rate of GST = 17 %

<h2>To Find :</h2>

• The amount of GGS

<h2>Solution :</h2>

★ GST Amount = Original cost of the product or service - (Original cost of the product or service) x (100 ) / (100 + GST%)

⇒ 66,400 − (66,400) × (100) / (100 + 17)

⇒ \mathsf{66,400 - ( 66,400 \times \dfrac{100}{(100 + 17)} )}

⇒ 9,647.87

GST Amount = Rs 9,647.87

∴ The amount of GST is Rs 9,647.87

8 0
3 years ago
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