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3 years ago

5

does anyone have the unit 3 expressions, equations, and inequalities unit test: B answer key. i really really need it. this is a

n EMERGENCY. PLEASE HELP ME

1 answer:

Vilka [71]3 years ago

5 0

Answer:

sorry but you can write question instead of writing that because some of you may know that but others donot knew it

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What is the equation of a line, in general form, that passes through point (1, -2) and has a slope of 1/3. 1.x - 3 y - 7 = 2.x -

Nutka1998 [239]

Answer:

x- 3y - 7=0

Step-by-step explanation:

the line in the slope-intercept form:

y= mx+b

m= 1/3 and point given (1, -2) by using which we find y-intercept:

b= y-1/3x
b= -2- 1/3*1= - 7/3

y= 1/3x- 7/3

General form of a line is: ax+by+c= 0

converting:

y= 1/3x- 7/3 ⇒ 3y= x- 7 ⇒ x- 3y - 7=0

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3 years ago

The weather forecast states that the temperature will be lower than –5°F tonight. Let t represent the temperature in degrees Fah

Deffense [45]

Hi There!

<span>t < –5 and t may be a negative number!</span>

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3 years ago

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A student conducted a poll of 100 internet users and found the average time spent online per day was 2 hours. The student descri

n200080 [17]

I believe it's B or A Sample.

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3 years ago

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What is the domain and range for f(x)=x^2+8

Vladimir79 [104]

Domain is (-infinity, infinity)
Range is [8, infinity)

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3 years ago

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Determine the unknown angle measures, to the nearest degree, in the diagram provided.

serg [7]

Answer:

a is <u>5</u><u>3</u><u>.</u><u>8</u><u>°</u><u>,</u> and b is <u>3</u><u>6</u><u>.</u><u>2</u><u>°</u>

Step-by-step explanation:

Using sine trig rule:

${ \boxed{ \bf{ \sin(b) = \frac{opposite}{hypotenuse} }}}$

${ \tt{ \sin(b) = \frac{78}{132} }} \\ \\ { \tt{b = { \sin }^{ - 1}( \frac{78}{132} ) }} \\ \\ { \tt{b = 36.2 \degree}}$

Summation of angles of triangle:

${ \tt{a + b + 90 \degree = 180 \degree}} \\ { \tt{a + 36.2 \degree + 90 \degree = 180 \degree}} \\ { \tt{a = (180 - 36.2 - 90) \degree}} \\ { \tt{a = 53.8 \degree}}$

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3 years ago