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2 years ago

When can estimating an angle measure be useful in solving a problem?

Mathematics

1 answer:

yarga [219]2 years ago

8 0

Estimating an angle measure in a problem can be useful when the actual angle measurement cannot be determined

<h3>When estimates are useful</h3>

Estimates are simply used to approximate and to guess the actual value of a measured quantity

In angles, when the actual measurement is not known, the estimate can be used in place of the actual value

Hence, estimating an angle measure can be useful when the actual angle measurement cannot be determined

Read more about estimation and approximation at:

brainly.com/question/6768038

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Please help! Will award brainliest. Simplify the expression -5+i/2i. Please show your work.

lorasvet [3.4K]

(-5+i)/2i

multiply by i/i

(-5+i) *i = -5i +i^2 = -5i -1

2i*i = 2i^2 = 2(-1) = -2

(-1-5i)/-2

1/2 +5/2 *i

5 0

3 years ago

On a very cold morning, it was -7°F. As the day went on, the temperature rose 3 degrees each hour. Which equation shows the temp

wariber [46]

Answer:

The equation shows the temperature over time will be:

$y = 3x - 7$

Hence, option (C) is correct.

Step-by-step explanation:

We know that the slope-intercept form of the line equation is

$y=mx+b$

where m is the rate of change or slope and b is the y-intercept

Let 'y' be the temperature

Let 'x' be the time in the hour

Given that one very cold morning, it was -7°F.

Thus, the y-intercept = b = -7

Given that as the day went on, the temperature rose 3 degrees each hour.

Thus, the rate of change = slope = m = 3

Thus, substituting m = 3 and b = -7 in the equation

$y = mx+b$

$y = 3x + (-7)$

$y = 3x - 7$

Therefore, the equation shows the temperature over time will be:

$y = 3x - 7$

Hence, option (C) is correct.

3 0

3 years ago

10. f(x) = -x + 2 Domain: Range: x-intercept: y-intercept:

Gnesinka [82]

Domain & range both zero. X intercept: 2,0. y-intercept: (0, 2)

5 0

3 years ago

A rectangular library has a length os 36 feet and a perimeter of 116 feet what is the width in feet of the library

Vera_Pavlovna [14]

Answer: The width of the library is 22feet.

Perimeter = length+ length+ width+ width

The problem is telling us that the perimeter is 116 and the length is 36. So let’s plug it in and solve for width which equal w
w= width
Step 1: 116= 36+ 36+ w+w

Step 2: 116=72+ 2w

Step 3: 116= 72+2w
-72 -72

Step 4: 44=2w

Step 5: divide 2w on both sides ( 44 divided by 2)

Step 6: w= 22

5 0

3 years ago

Howdy! Id love to have these questions answered asap! Thank you for the help!

tiny-mole [99]

Answer:

1. B.

2. B.

Step-by-step explanation:

Trigonometry

1) Coterminal angles can be found by adding or subtracting 360° (or 2\pi radians) to a given angle. If we have 120°, adding 360° gives 480°, adding again 360° gives 840°. There is no way to get -180°, so this option is not a coterminal angle to 120°

A. $Cos (-90^o)=0$ , and not undefined

B. $Sin (-90^o)=-1$ . This is correct

C. $Tan (-90^o)$ is undefined, not zero

Thus the only correct option is B.

8 0

3 years ago