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Naddika [18.5K]
3 years ago
5

If you were to solve the following system by substitution what would be the best variable to solve

Mathematics
1 answer:
nadezda [96]3 years ago
3 0
We need to know more about what you are talking about 

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Mr. phill stopped to fill his car with gas on the way to New York. It took 1 ¼ minutes to fill a 15 liters of gas in his tank. A
KatRina [158]

Answer:

  • 4 1/6 min or 4 min 10 sec

Step-by-step explanation:

<u>Filling rate is:</u>

  • 15 ÷ 1 1/4 = 15 ÷ 5/4 = 15 × 4/5 = 12 l/min

<u>Total volume is 50 l, time required to fill is:</u>

  • 50/12 = 4 2/12 = 4 1/6 min or 4 min 10 sec
4 0
3 years ago
Olaf needs a total of 3 cups of sugar to make 4 cakes. Write and solve an equation to find the number of cups of sugar he needs
irinina [24]

Answer:

3/4 cup

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Please assist me with these problems​
Vinil7 [7]

Part (a)

<h3>Answer: y1 and y3 are perpendicular</h3>

This is because the two slopes 2 and -1/2 multiply to -1. Perpendicular slopes multiply to -1 assuming neither line is vertical or horizontal.

=====================================================

Part (b)

Graph each line to see where they cross. The three points of intersection are

(0,4)

(2,-2)

(4,2)

The order of the points doesn't matter.

You could also form three systems of equations pairing up the equations, and solving each system. That way you can find the points of intersection. Graphing may be a better and faster route in my opinion. See the diagram below.

3 0
3 years ago
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Write an equation for the following problem
Novosadov [1.4K]

Answer:

I believe I know the answer! Please do tell me If I am wrong but math was never my strong sute so tell me If I’m wrong please!

Step-by-step explanation:

8n-15=27 or

(8xn)-15=27

Bonus: n= 5.25 or 5 1/4

(I think)

4 0
3 years ago
1.
Margarita [4]

Answer:

The ball throw into the air with an initial velocity of 22 meters per second is 27.4 meters above the ground after 3 seconds.

Step-by-step explanation:

The quadratic function h(t) = -4.9t^2 + 22t + 5.5 represents the height of the ball above the ground, h(t), in meters, with respect to time, t, in seconds.

To find h(3), substitute t = 3 into the function expression:

h(3)=-4.9\cdot 3^2+22\cdot 3+5.5\\ \\=-4.9\cdot 9+66+5.5\\ \\=-44.1+71.5\\ \\=27.4

Meaning: the ball throw into the air with an initial velocity of 22 meters per second is 27.4 meters above the ground after 3 seconds.

5 0
4 years ago
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