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3 years ago

Giving 15 points! Please help me with these two figures!

Mathematics

1 answer:

Oksana_A [137]3 years ago

8 0

11. D. Square Pyramid
12. A. Cube

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Point B has coordinates (−4, −2). The x-coordinate of point A is 5. The distance between points A and B is 15 units. What are th

GaryK [48]

$~~~~~~~~~~~~\textit{distance between 2 points} \\\\ A(\stackrel{x_1}{5}~,~\stackrel{y_1}{y})\qquad B(\stackrel{x_2}{-4}~,~\stackrel{y_2}{-2})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ \stackrel{AB}{15}=\sqrt{[-4 - 5]^2 + [-2 - y]^2}\implies 15^2=(-9)^2+(-2-y)^2$

$225=81+(-2-y)(-2-y)\implies 225=81+\stackrel{F~O~I~L}{(4+4y+y^2)} \\\\\\ 144=4+4y+y^2\implies 0=y^2+4y-140\implies 0=(y-10)(y+14) \\\\\\ y= \begin{cases} 10\\ -14 \end{cases}\qquad \qquad \qquad A(5~~,~~10)\qquad A(5~~,~~-14)$

7 0

2 years ago

Find a number which decreased by 24 equals 3 times it’s opposite

Nata [24]

x - 24 = 3 (-1) x

x - 24 = -3x

-24 = -4x

x = 6

Step-by-step explanation:

6 0

4 years ago

Need help<br><br> 3y+5x=22; x=y/2

Marizza181 [45]

Answer-

point from:

(2,4)

explanation from:

x =2, y = 4

4 0

3 years ago

Read 2 more answers

Multiply. 32√⋅28√⋅3√⋅6√ Enter your answer, in simplest radical form, in the box.

valkas [14]

Answer:

48√7

Step-by-step explanation:

$\sqrt{32}\cdot\sqrt{28}\cdot\sqrt{3}\cdot\sqrt{6}=\sqrt{(2^5)(2^2\cdot 7)(3)(2\cdot 3)}\\\\=\sqrt{(2^4\cdot3)^2(7)}=2^4\cdot 3\sqrt{7}=\boxed{48\sqrt{7}}$

4 0

3 years ago

I need to slove −7x ^2 +x+9=−6x

guapka [62]

Answer:

1. if you are solving using the quadratic formula. the answer is in the first picture.

2. if you are looking to completing the square the answer is in the second picture.

Step-by-step explanation:

4 0

3 years ago