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3 years ago

8

Can someone help? This is hard!

1 answer:

Vlad1618 [11]3 years ago

4 0

(5,5). This is because of you look from the y axis and the x axis the point adds up to (5,5)

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If sin^-1 (x+3) = -pi/6 , x = ?

____ [38]

First recall that $\sin^{-1}x$ is defined only for $-1\le x\le1$ , which means $\sin^{-1}(x+3)$ requires that $2\le x+3\le4$ .

Over this domain, $\sin^{-1}(x+3)$ will be invertible, and so taking the sine of both sides, we have

$\sin^{-1}(x+3)=-\dfrac\pi6\implies\sin\left(\sin^{-1}(x+3)\right)=\sin\left(-\dfrac\pi6\right)$
$x+3=-\sin\dfrac\pi6$
$x+3=-\dfrac12$
$x=-\dfrac72$

7 0

3 years ago

Fill in the blank. 7x10=(7x7)+(7x_)

dangina [55]

Answer: 3

Explanation: (7x7) + (7x3) = 7x10

7x7 = 49
7x3 = 21
7x 10 = 70

49+21= 70

Hope this helps! <3

7 0

3 years ago

Which of the following is an algebraic expression that represents the phrase X increased by 20

iren2701 [21]

Answer:

The expression means that X+20

5 0

3 years ago

True or false: A triangle can be drawn with an angle of 60, 60 and 70

ohaa [14]

The sum of angles in triangle is equal to 180 degrees, so we need to check the sum of 60, 60 and 70

60+60+70=190

190>180, so it's false

Answer: False

3 0

3 years ago

Read 2 more answers

A cone with a radius 2 units is shown below. Its volume is 29 cubic units. Find the height of the cone

rusak2 [61]

Answer:

The height of the cone is $6.9\ units$

Step-by-step explanation:

we know that

The volume of the cone is equal to

$V=\frac{1}{3}Bh$

where

B is the area of the circular base of the cone

h is the height of the cone

In this problem we have

$V=29\ units^{3}$

$r=2\ units$

<em>Find the area of the base B</em>

$B=\pi r^{2}$

substitute the value of r

$B=\pi (2)^{2}=4 \pi\ units^{2}$

<em>Find the height of the cone</em>

$29=\frac{1}{3}(4 \pi)h$

$h=29*3/(4 \pi)$

assume $\pi=3.14$

$h=29*3/(4*3.14)=6.9\ units$

7 0

3 years ago