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Arada [10]
2 years ago
13

Please help me 10 points pleaseee helppp

Mathematics
1 answer:
cestrela7 [59]2 years ago
7 0
There’s a whole bunch going on i don’t know what to help you with
You might be interested in
If the point (4,-2) is included in a direct variation relationship, which point also belongs in this direct variation? A. (-4,2)
IceJOKER [234]

Answer:

(-4,2) belongs in this direct variation.

Step-by-step explanation:

Let the direct variation relationship is expressed by the equation y = mx ........ (1), where x and y are in direct variation and k is the variation constant.

Now, the point (4,-2) is included in the direct variation relationship, then from equation (1) we get, -2 = 4m

⇒ m =  - \frac{1}{2}

Therefore, the equation (1) becomes y = - \frac{1}{2}x

⇒ x + 2y = 0 ......... (2)

Now, from the given four options only the point (-4,2) satisfies the relation (2).

Hence, (-4,2) belongs in this direct variation. (Answer)

5 0
3 years ago
Help ?? Anyone and how
ELEN [110]

Answer:

just insert the x numbers in the calculation.. so for x = - 3 - > (- 3) / 2 +4 = 2.5

Step-by-step explanation:

x - 2 = y 3

and so on

7 0
3 years ago
when seven is added to a certain number the result is the same as subtracting twice the number from sixteen what is the number .
jeyben [28]
The meaning of the question is

Let the unknown number be x

Therefore x+7=16-2x
Now 2x+x=16-7
3x=9
X=9/3
x=3
6 0
3 years ago
10 ,15 as a simple form
NikAS [45]

10,15 in the simplest form is 2,3

5 0
3 years ago
PLEASE OF YOU CAN SHOW THE WORK:
Alex777 [14]

Answer:

x\approx24^\circ

Step-by-step explanation:

We know that r and s have a combined length of 70. Therefore:

r+s=70

Notice that we can determine r by using the Pythagorean Theorem. In this case, r is the hypotenuse, and 20 and 8 are the legs. Therefore:

a^2+b^2=c^2

Substituting 20 and 8 for a and b and r for c yields:

20^2+8^2=r^2

Compute:

464=r^2

Therefore:

r=\sqrt{464}=\sqrt{16\cdot 29}=4\sqrt{29}

Now, we can determine s. We know that:

s+r=70

So, by substitution:

s+4\sqrt{29}=70

Therefore:

s=70-4\sqrt{29}

Now, notice that, with respect to x, 20 is the opposite side and s is the hypotenuse.

Therefore, we can use the sine ratio. The sine ratio is the ratio between a right triangles opposite side to its hypotenuse.

In this case, the opposite to x is 20, and the hypotenuse is s, or 70-4√29. Therefore:

\displaystyle \sin(x^\circ)=\frac{20}{s}

By substitution:

\displaystyle \sin(x^\circ)=\frac{20}{70-4\sqrt{29}}

Take the inverse sine of both sides:

\displaystyle x^\circ=\sin^{-1}\Big(\frac{20}{70-4 \sqrt{29}} \Big)

Use a calculator. Therefore:

x\approx24.37^\circ\approx24^\circ

8 0
2 years ago
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