04.03.2022

Solve the system of equations. 2y + 77 = -5 5y – 7x = 12 72

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09.07.2023, solved by verified expert
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Solve the system of equations. 2y + 77 = -5 5y, №18010540, 04.03.2022 07:58

Step-by-step explanation:

Solve the system of equations. 2y + 77 = -5 5y, №18010540, 04.03.2022 07:58

Isolate y for 2y+77=-5:

Solve the system of equations. 2y + 77 = -5 5y, №18010540, 04.03.2022 07:58

Solve the system of equations. 2y + 77 = -5 5y, №18010540, 04.03.2022 07:58

Solve the system of equations. 2y + 77 = -5 5y, №18010540, 04.03.2022 07:58

Solve the system of equations. 2y + 77 = -5 5y, №18010540, 04.03.2022 07:58

Solve the system of equations. 2y + 77 = -5 5y, №18010540, 04.03.2022 07:58

Isolate x for -205-7x=1272

Solve the system of equations. 2y + 77 = -5 5y, №18010540, 04.03.2022 07:58

Solve the system of equations. 2y + 77 = -5 5y, №18010540, 04.03.2022 07:58

Solve the system of equations. 2y + 77 = -5 5y, №18010540, 04.03.2022 07:58

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Mathematics
Step-by-step answer
P Answered by Master

y=-41,\:x=-211

Step-by-step explanation:

\begin{bmatrix}2y+77=-5\\ 5y-7x=1272\end{bmatrix}

Isolate y for 2y+77=-5:

y=-41

\mathrm{Substitute\:}y=-41

\begin{bmatrix}5\left(-41\right)-7x=1272\end{bmatrix}

Simplify

\begin{bmatrix}-205-7x=1272\end{bmatrix}

Isolate x for -205-7x=1272

x=-211

\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}

y=-41,\:x=-211

Mathematics
Step-by-step answer
P Answered by PhD
Answer: 440 grams for 1.54 is the better value
Explanation:
Take the price and divide by the number of grams
1.54 / 440 =0.0035 per gram
1.26 / 340 =0.003705882 per gram
0.0035 per gram < 0.003705882 per gram
Mathematics
Step-by-step answer
P Answered by PhD

For every 8 cars there are 7 trucks

Therefore,

Cars:Truck=8:7

Answer is B)8:7

Mathematics
Step-by-step answer
P Answered by PhD
The answer is in the image 

The answer is in the image 

Mathematics
Step-by-step answer
P Answered by PhD

Speed=Distance/time

Here,

distance=15m

time=1sec

speed=15/1=15m/sec

Distance=Speed*time

time=15min=15*60sec=900sec

Distance travelled in 15 min=15*900=13,500m

=13500/1000 km=13.5Km

Mathematics
Step-by-step answer
P Answered by PhD

30% of 420 are first year students

first year students = (30/100 )*420

=126 students

Student who are not in first year = 420-126

=294 students  

Mathematics
Step-by-step answer
P Answered by PhD

tip=18% of 75.45

     =18/100 * 75.45 = $13.581

Tip = $13.581

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