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vovikov84 [41]
1 year ago
10

PLEASE HELP IM STUCK PLS

Mathematics
2 answers:
tankabanditka [31]1 year ago
6 0

Answer:

y is equal to -16

Elis [28]1 year ago
4 0

Answer:

y = 8

Step-by-step explanation:

We can use proportions for this question since y varies directly with x. This means that if x changes, y changes along with the x, and vice versa.

When y = -8, x = 4, so the proportion will be -8 : 4.

We need to find the y when x is 4, so our equation will be:

-8 : 4 = y : -4

Since the proportion will be the same.

Next, we multiply the inner two numbers, and the outer two numbers, saying that the values are the same.

4y = 32

y = 8

So y = 8 will be our answer!

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If sin(x) = 5/13, and x is in quadrant 1, then tan(x/2) equals what?
Rufina [12.5K]
x is in quadrant I, so 0, which means 0, so \dfrac x2 belongs to the same quadrant.

Now,

\tan^2\dfrac x2=\dfrac{\sin^2\frac x2}{\cos^2\frac x2}=\dfrac{\frac{1-\cos x}2}{\frac{1+\cos x}2}=\dfrac{1-\cos x}{1+\cos x}

Since \sin x=\dfrac5{13}, it follows that

\cos^2x=1-\sin^2x\implies \cos x=\pm\sqrt{1-\left(\dfrac5{13}\right)^2}=\pm\dfrac{12}{13}

Since x belongs to the first quadrant, you take the positive root (\cos x>0 for x in quadrant I). Then

\tan\dfrac x2=\pm\sqrt{\dfrac{1-\frac{12}{13}}{1+\frac{12}{13}}}

\tan x is also positive for x in quadrant I, so you take the positive root again. You're left with

\tan\dfrac x2=\dfrac15
4 0
3 years ago
Factor the expression 1.5x+6
swat32

There is no way to factor this so i would assume the answer is no solution.

7 0
3 years ago
What is 2/6 in simplest form? Find the greatest common factor of 2 and 6 and divide by that number. *
nalin [4]

Answer:

\frac{1}{3}

Step-by-step explanation:

2 = 2 × 1

6 = 2 × 3

GCF = 2

\frac{2 /2 }{6/2} =\frac{1}{3}

3 0
2 years ago
Read 2 more answers
4 + 2x2(3x-5)<br> number of terms
igor_vitrenko [27]
3, assuming 2x2 is 2x squared, u will get
4 + 6x3 - 10x2

So 3 terms
7 0
2 years ago
I don’t understand how to do this problem
irga5000 [103]

Answer:

Car

Step-by-step explanation:

Well, the car is 21 feet in one second.

6*21=126

The truck, however, is 18 feet per second.

18*6=108

The car is faster.

3 0
2 years ago
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