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2 years ago

13

Which one of these is not a step used when constructing an inscribed equilateral triangle using technology?

1 answer:

dusya [7]2 years ago

6 0

The third one duhhh, Ik this stuff

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How do you Subtract 9x^2 + 22x - 46 from 12x^2 - 8x + 12.

Luba_88 [7]

Subtract the $x^2$ terms from each other, then the $x$ terms, then the ones without any $x$ whatsoever.

$(12x^2 - 8x + 12) - (9x^2 +22x-46)$

First, we'll subtract $9x^2$ from $12x^2$

$12x^2-9x^2- = 3x^2$

Result: $3x^2$

Next, we'll subtract $22x$ from $-8x$

$-8x - 22x = -30x$

Result: $-30x$

Finally, we'll subtract $-46$ from $12$

$12-(-46) = 12+46 = 58$

Result: $58$

Now, we can add these 3 results together.

First, we had $3x^2$ , then $-30x$ , and finally $58$ .

Thus, our subtraction of

$(12x^2 - 8x + 12) - (9x^2 +22x-46)$

equals

$3x^2-30x+58$

4 0

2 years ago

What basic trigonometric identity would you use to verify that sin^2x +cos^2x/cos x = sec x

gogolik [260]

<u>Answer:</u>

The basic identity used is $\bold{\sin ^{2} x+\cos ^{2} x=1}$ .

<u>Solution: </u>

In this problem some of the basic trigonometric identities are used to prove the given expression.

Let’s first take the LHS:

$\Rightarrow \frac{\sin ^{2} x+\cos ^{2} x}{\cos x}$

Step one:

The sum of squares of Sine and Cosine is 1 which is:

$\sin ^{2} x+\cos ^{2} x=1$

On substituting the above identity in the given expression, we get,

$\Rightarrow \frac{\sin ^{2} x+\cos ^{2} x}{\cos x}=\frac{1}{\cos x} \rightarrow(1)$

Step two:

The reciprocal of cosine is secant which is:

$\cos x=\frac{1}{\sec x}$

On substituting the above identity in equation (1), we get,

$\Rightarrow \frac{\sin ^{2} x+\cos ^{2} x}{\cos x}=\sec x$

Thus, RHS is obtained.

Using the identity $\sin ^{2} x+\cos ^{2} x=1$ , the given expression is verified.

6 0

2 years ago

If a cube has a volume of 343 in, what is its surface area?

Sophie [7]

343 is a cube root of 7. Its surface area is 7

6 0

2 years ago

Read 2 more answers

PLZZZHELP <br> ill mark brainliest

ludmilkaskok [199]

Answer:

$y=\frac{x+2}{4}$ or y = 0.25x + 0.5

Step-by-step explanation:

You need to try change the subject from x to y.

x = 4y - 2

We first move -2 to the left, making the equation

x + 2 = 4y i.e.

4y = x + 2

We then divide both sides by 4.

$y=\frac{x+2}{4}$ or y = 0.25x + 0.5

We now have successfully made y the subject, and effectively solving the equation.

3 0

2 years ago

Troy started at the fire station. He walked to the library and then rode his bike to the post office. If Troy only traveled alon

3241004551 [841]

Answer:

Step-by-step explanation:

Calling it blocks is a little weird. but a good way to do it is to move left or right until you are over or below where you want to go then move up or down accordingly. Each move, left, right up or down will count as one block.

So from the fire station you go 1 to the right and then 6 down, for a total of 7. then from the library it's 3 right then 4 up, which is 7 again. 7 to the first stop then 7 to the second makes 14 total.

If there's something you don't get let me know.

7 0

2 years ago