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Mila [183]
4 years ago
13

-7a-10=20-3a please show work help

Mathematics
1 answer:
olga_2 [115]4 years ago
7 0
-7a-10=20-3a

Combine like terms:
-4a -10 = 20
-4a = 30

Solve for a:
a =  -\frac{30}{4} = -7.5

Your answer: a = -7.5
You might be interested in
How do the lengths of line segments define the golden ratio?
NISA [10]

Answer:

\frac{a+b}{a}=\frac{a}{b}

Step-by-step explanation:

The golden ratio is a special number favored by the Greeks. Its ratio roughly equals 1.618. The ratio is formed by taking a line segment and dividing it into two parts labeled a and b. The golden ratio is formed when this proportion is true \frac{a+b}{a}=\frac{a}{b}.

When you add a and b then divide by a, it will be the same as a divided by b. This will hold true only for specific lengths of a and b. This means you must divide the line segment in such a way that a and b meet this requirement.

Example:

If the line segment is 50 cm long. Split the segment into parts a and b where a = 30.9 and b = 19.1. Substitute the values into the proportion \frac{a+b}{a}=\frac{a}{b}.

\frac{30.9+19.1}{30.9}=\frac{30.9}{19.1}

\frac{50}{30.9}=\frac{30.9}{19.1}

1.618 = 1.618

This is the golden ratio.

5 0
4 years ago
¿Decir al cuadrado el lo mismo que decir elevado a la 2?
scoundrel [369]
Hola ,  decir al cuadrado es lo mismo que decir elevado a la 2.
5 0
3 years ago
Help please also due tomorrow so thanks also it's question number 4
Veseljchak [2.6K]
Fin how much was taken out
9 750 ml
9 times 750=6750ml

he has an 8 liter jug
1 liter=1000ml
convert 8L to ml
8 times 1000=8000ml

full-takenout=remaining
8000-6750=1250ml remaining



answer is D

also 5 kilometers
1 kilometer=1000 meters
5 times 1000=5000meters


answers are
D 1250 ml
5000meters jogged
8 0
3 years ago
CAN SOMEONE PLEASE HELP ME ON THIS PLEASE SHOW THE WORK I REALLY JUST NEED ANYONE BRO TO BREAK IT DONE FOR ME
Nadusha1986 [10]

Answer:

I geuss we'll neva know

*cues music*

Step-by-step explanation:

3 0
3 years ago
The sum of three numbers is 103. The second number is 7 more than the first. The third number is 3 times the second. What are th
leva [86]

Answer: 15,22 and 66

Step-by-step explanation: Call the numbers a,b and c.

Their sum is 103 so a+b+c=103

The second number is 7 more than the first so b=a+7

The third number = 3 times the second so c=3b

Now replace c with 3b in the top equation, so a+b+3b=103, which becomes a+4b=103

Now replace b with a+7, so a+4(a+7)=103. This solves to give a=15

b=a+7 so b=22 and c=3b so c=66

8 0
3 years ago
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