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3 years ago

6

HELP MEEEEEE ;-; PLEASE WORTH 20 POINTS

1 answer:

anastassius [24]3 years ago

3 0

This is a right triangle

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- 12 ÷ (-4) <br>How do I solve this?

jonny [76]

Two negatives make a positive so that is going to produce a positive number so -12÷-4 you just do normal division like always and it equals a great positive 3

3 0

3 years ago

Read 2 more answers

What is the length of the arc if: 11. r=10 n=20 A15(pi)/ 7 B13(pi)/ 5 C16(pi)/ 2 D11(pi)/ 4 E 10(pi)/ 9 F 9(pi)/ 4 12. r=3 n=6 A

Vilka [71]

Step-by-step explanation:

The formula for arc length [for the angle in degrees] is:

$L = 2\pi r \left(\dfrac{n}{360}\right)$

here,

$n$ = degrees

$r$ = radius

using this we'll solve all the parts:

r = 10, n = 20:

$L = 2\pi r \left(\dfrac{n}{360}\right)$

$L = 2\pi (10) \left(\dfrac{20}{360}\right)$

from here, it is just simplification:

2 and 360 can be resolved: 360 divided by 2 = 180

$L = \pi (10) \left(\dfrac{20}{180}\right)$

10 and 180 can be resolved: 180 divided by 10 = 18

$L = \pi \left(\dfrac{20}{18}\right)$

finally, both 20 and 18 are multiples of 2 and can be resolved:

$L = \pi \left(\dfrac{10}{9}\right)$

$L = \dfrac{10\pi}{9}$ Option (E)

r=3, n=6:

$L = 2\pi r \left(\dfrac{n}{360}\right)$

$L = 2\pi (3) \left(\dfrac{6}{360}\right)$

$L = \dfrac{\pi}{10}$ Option (D)

r=4 n=7

$L = 2\pi r \left(\dfrac{n}{360}\right)$

$L = 2\pi (4) \left(\dfrac{7}{360}\right)$

$L = \dfrac{7\pi}{45}$ Option (C)

r=2 n=x

$L = 2\pi r \left(\dfrac{n}{360}\right)$

$L = 2\pi (2) \left(\dfrac{x}{360}\right)$

$L = \dfrac{x\pi}{90}$ Option (D)

r=y n=x

$L = 2\pi r \left(\dfrac{n}{360}\right)$

$L = 2\pi (y) \left(\dfrac{x}{360}\right)$

$L = \dfrac{xy\pi}{180}$ Option (E)

6 0

4 years ago

Wht is 39% of 1,200? I can't understand it

Gennadij [26K]

Something percent of a number must be smaller than the number.
And also, 39% of a number is equal to 39/100 multiplied by the number.

Thus:
39/100 * 1200
39/1 * 12
468

8 0

3 years ago

Read 2 more answers

Suppose that engineering specifications on the shelf depth of a certain slug to be turned on a CNC lathe are from .0275 in. to .

MrRa [10]

Answer:

0.8188 or 82%

0.0000643

Step-by-step explanation:

Given that engineering specifications on the shelf depth of a certain slug to be turned on a CNC lathe are from .0275 in. to .0278 in.

If x is the dimension then X is N(0.0276, 0.0001)

Or $\frac{x-0.0276}{0.0001}$ is Normal (0,1)

a) Fraction of shelf depths are in specifications

= $P(0.0275$

b) For 98% to be within the specifications,

$\mu = 0.02765$

Margin of error = $0.0278-0.02775\\=0.00015$

For 98% critical value Z two tailed is 2.33

Hence std error = $\frac{0.00015}{2.33} \\=0.0000643$

So sigma should be = 0.0000643

3 0

3 years ago

(GEOMETRY. ANSWER IF U ONLY KNOW! PLS HELP!!) Given right triangle ABC, what is the value of tan(A)?

dalvyx [7]

Tan=Opposite/Adjacent
The required angle is A (Tan A)
So, tanA=24/10
=12/5

8 0

3 years ago