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3 years ago

Please help will give BRAINLIEST.

Mathematics

1 answer:

Anna71 [15]3 years ago

6 0

Answer: B) 12

Step-by-step explanation: In order to solve this you have to know the scale factor between the two triangles. In order to do that you just need to take a similar side between the two triangles and divide them. For example:

10 / 15 = .6666

This is RW divided by RT

Now that you have the scale factor, you just need to multiply it by 18 to get WV.

18 x .666666 = 12

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A number n is 5 more than 12

zzz [600]

X + 12 = n
N is 5 more than twelve so add 5 to 12 and you get 17.

6 0

3 years ago

-3 + 9x = -6 can somebody help me on this question ASAP please.

lions [1.4K]

Answer:

Step-by-step explanation:

i assume you need x

-3+9x=-6

add 3 on both sides

9x=-6+3

9x=-3

x=-3/9=-1/3

4 0

3 years ago

Which of the following points lies on the circle whose center is at the origin and whose radius is 5?

ad-work [718]

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Equation of the circumference whose center is at $\mathsf{C(0,\,0)}$ and whose radius is $\mathsf{r=5:}$

$\mathsf{(x-x_C)^2+(y-y_C)^2=r^2}\\\\
\mathsf{(x-0)^2+(y-0)^2=5^2}\\\\
\mathsf{x^2+y^2=25}$

We are looking for the point that satisfies the equation above.

 • Testing $\mathsf{(-3,\,4):}$

$\mathsf{(-3)^2+4^2}\\\\
\mathsf{9+16}\\\\
\mathsf{25\qquad\quad\checkmark}$

The point $\mathsf{(-3,\,4)}$ lies in the circumference.

 • Testing $\mathsf{(1,\,-2):}$

$\mathsf{1^2+(-2)^2}\\\\ \mathsf{1+4}\\\\ \mathsf{5\ne 25\qquad\quad\diagup\hspace{-9}\diagdown}$

The point $\mathsf{(1,\,-2)}$ doesn't lie in the circumference.

 • Testing $\mathsf{(\sqrt{5},\,\sqrt{5}):}$

$\mathsf{(\sqrt{5})^2+(\sqrt{5})^2}\\\\ \mathsf{5+5}\\\\ \mathsf{10\ne 25\qquad\quad\diagup\hspace{-9}\diagdown}$

So, the point $\mathsf{(\sqrt{5},\,\sqrt{5})}$ doesn't lie in the circumference either.

Answer: (–3, 4).

I hope this helps. =)

8 0

4 years ago

Read 2 more answers

Marcus went to a sporting goods store and bought 4 basketballs and 2 tennis racquets. The basketballs were all the same price, a

AlekseyPX

It would be $20 . 20x4 is 80 add that with the rackets and you get 200

6 0

3 years ago

Read 2 more answers

(a) What is wrong with the following equation? x2 + x − 42 x − 6 = x + 7 (x − 6)(x + 7) ≠ x2 + x − 42 The left-hand side is not

jeka94

Answer:

Attached please find answer

Step-by-step explanation:

= (x² + x - 42) / (x - 6)

= [x² + (7x - 6x) - 42] / (x - 6)

= [x² + 7x - 6x - 42] / (x - 6)

= [(x² + 7x) - (6x + 42)] / (x - 6)

= [x(x + 7) - 6(x + 7)] / (x - 6)

= [(x + 7)(x - 6)] / (x - 6)

= x + 7 → when x approches 6

= 6 + 7

= 13

Other method:

Lim (x² + x - 42) / (x - 6)

x→ 6

When x → 6, there is an indeterminate expression because: 6 - 6 = 0

Do you know the l'Hôpital's rule, when x → a:

Lim [ f(x) / g(x) ] = Lim [ f'(x) / g'(x) ]

f(x) = x² + x - 42

f'(x) = 2x + 1

g(x) = x - 6

g'(x) = 1

= f'(x) / g'(x)

= (2x + 1)/1

= 2x + 1 → when x approches 6

= 12 + 1

= 13

3 0

3 years ago