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Masteriza [31]
3 years ago
12

5[5y -6] = 4[y -7] solve the equation by balancing the equation

Mathematics
2 answers:
Slav-nsk [51]3 years ago
6 0
A(b-c) = axb - axc

25y - 30 = 4y - 28

25y - 30 + 30 = 4y - 28 + 30

25y = 4y - 2

25y - 4y = 4y - 4y - 2

21y/21 = 2/21

X = 2/21
Ghella [55]3 years ago
4 0

Answer:

21y = 23

Step-by-step explanation:

1. 25y-30 = 4y-7

2. 25y-4y = 30-7 (move like terms over to each side)

3. 21y = 23

4. Approximately 1.0952381

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A. 76°<br><br> B. 72°<br><br> C. 70°<br><br> D. 12°
Crank

Answer:measurement of angle B is

70 \:  \: degrees

<h3>Answer C is correct</h3>

Step-by-step explanation:

6x - 2 + 5x + 18 + 2x + 8 = 180 \\ 13x + 24 = 180 \\ 13x = 180 - 24 \\ 13x = 156 \\  \frac{13x}{13}  =  \frac{156}{13}  \\ x = 12 \:  \: degrees

7 0
3 years ago
A crew of highway workers paved 1/5 mile in 1/8 hour. If they work at the same rate, how much will they
Elan Coil [88]

Answer:

The easiest approach is to realise that one hour is 3 times longer than 20 minutes. The longer the time, the more they will pave.

215 of a mile, in 20 minutes, how much in 60 minutes?#

They will pave 3 times more.

215×31=615 of a mile

615=25 of a mile

You could also use the 'unitary method' where you find out how much they pave in ONE minute (divide by 20) and them multiply by 60 to find how much in one hour.

Look at what happens:

215÷20×60

=215×120×603

=215×3 ← exactly the same maths.

=25

6 0
3 years ago
The entire rectangle below has an area of .
Nastasia [14]

Answer:

Hence the required ans. Is 24cm2.

Step-by-step explanation:

I have explained Ans. at above. See it and how you Understand it. If you have any doubt then Comment . if you Like then Plz Give me 5 star rating

5 0
3 years ago
$5 box of cereal: 40% discount?
REY [17]
Uh sure what type of cereal?
4 0
3 years ago
write an equation that demonstrates the relationship between x and y for the points plotted on the coordinate grid ​
svetoff [14.1K]
Answer: y=3x-7

Explanation:

The y-intercept is -7 and the line is going up by a rate of 3.

5 0
3 years ago
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