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bixtya [17]
3 years ago
5

How do You do solving system of equations by solving for a variable

Mathematics
1 answer:
In-s [12.5K]3 years ago
6 0
Well, you have to do it with the substitution method now it's not easy, it takes some time to get used to it. I'm not really sure how to explain it but if you go on Khan Academy it will show you how to do it.
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(9+4c)+(2+3x) add timed so hurry!
Luba_88 [7]

Answer: 3x + 4c + 11

Step-by-step explanation: Combine like terms.

5 0
3 years ago
If a car can travel 220 miles on 12 gallons of gas, how many gallons
vampirchik [111]

Set up a ratio of known to unknown:

Let X = the amount of gas needed for 500 miles:

220/12 = 500/x

Cross multiply:

220x = 6000

Divide both sides by 220:

X = 6000 / 220

x = 27.27 gallons (round answer as needed).

4 0
3 years ago
How many yards are in 7 miles? A. 12,320 B. 700 C. 252 D. 36,960
katrin [286]
The answer is A 
hope this helps
4 0
3 years ago
Read 2 more answers
A pentagon can be divided into five congruent triangles. The function t=5 tan theta models the height of each triangle. What is
pentagon [3]
We assume that the dimension 5 has units of feet.

The area of each triangle will be
  A = (1/2)bh
where b=2×(5 ft), h=(5 ft)tan(54°)
Then
  A = (1/2)(2×5 ft)(5 ft)(tan(54°)
  A = 25×tan(54°) ft²

There are 5 such triangles making up this pentagon, so the total area is
  total area = 5×25×tan(54°) ft² ≈ 172 ft²

6 0
3 years ago
An adult ticket to a school play cost $5 and a student ticket cost $3. $460 dollars was collected and 120 tickets were sold. How
inn [45]
5x + 3y = 460
5(x + y = 120)
5x + 5y = 600
Use elimination subtraction
-2y = -140
y = 70
There are 70 student tickets
3 0
3 years ago
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