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ser-zykov [4K]
3 years ago
13

Assign two variables for each problem, and write the equations. Do not solve.

Mathematics
1 answer:
NemiM [27]3 years ago
6 0
Price of boots is represented as x, price of tennis shoes is represented as y. x-y=44.38 x+y=196.12 Isolate x. (Or y, if you wanted to) x=y+44.38 x=196.12-y Set them equal to each other. y+44.38=196.12-y Solve for y. Then plug it in to either of the two original equations to find x. x=120.24 y=75.86 Note: This is assuming that the boots are more expensive than the tennis shoes. If the tennis shoes are more expensive than the boots, then the prices would be switched. I didn't find this clear in your question.
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Answers;<br> A) 135 degree’s<br> B) 30 Degree’s<br> C) 180 or 0 Degree’s<br> D) 90 Degree’s
Vladimir [108]

Answer:

C). 0 degrees

Step-by-step explanation:

The given equation is:

-4 + 6 sinx = -4 + 4 sinx

adding 4 on both sides:

4 - 4 + 6 sinx = 4 - 4 + 4 sinx

6sinx = 4sinx

dividing by 2 on both sides, we get:

6sinx/2 = 4sinx/2

3 sinx = 2 sinx

subtracting 2 sinx from both sides we get:

sin x = 0

x = sin⁻¹ (0)

x = 0 degrees

4 0
3 years ago
Leo's model airplane uses O.03 L of fuel each minute it flies.Lf the fuel tank holds O.5 L, how long can the plane fly without r
Keith_Richards [23]

16 minutes

0.03*16=0.48

Closest you can get w/out going over.

3 0
3 years ago
What is 5V 28 +V63 in simplest radical form?
polet [3.4K]
Hope this helps and have an amazing day!!!

3 0
3 years ago
an object falls 16t2 feet in t seconds. you drop a rock from a bridge that is 75 feet above the water. will the rock hit the wat
Goryan [66]

Answer:

No, the rock will not hit the water in 2 second but it will hit the water in t ≅ 2.17 second

Step-by-step explanation:

Let the distance be s in feet. i.e,  s= 16 t^2 where t is in second.

You drop a rock from a bridge that is 75 feet above the water.

Use the  expression s =16t^2 to solve for t:

Given: s =75 feet

then, substitute in the above expression:

75 = 16 t^2 or we can write it as:

t^2=\frac{75}{16}= 4.6875 or

t = \sqrt{4.6875}

⇒ t = 2.16506351 or t ≅2.17 second

Therefore, the rock hit the water in t≅2.17 second


5 0
3 years ago
An examination class of 55% of pupil scored 70% , if 54% scored above 70%. how many scored above 70%.
konstantin123 [22]
35 % cause I said so
8 0
2 years ago
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