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3 years ago

1.00

Mathematics

1 answer:

jenyasd209 [6]3 years ago

6 0

Answer:

Step-by-step explanation:

Plug in 3 into both expressions

Then add those results

2(3)+21=6+21=27

3-24 =-21

-------

6 is the sum of 27 and -21

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Help me please.No spammmers.

egoroff_w [7]

Answer:

Step-by-step explanation:

cot =cos/sin =a/b

cos=a/b*sin

(sin-cos)/(sin+cos) =(sin-sin*a/b)(sin+sin*a/b)

=(1-a/b)/(a+a/b)

=(b-a)/(a+b)

5 0

2 years ago

What is 2x84 I don’t know the answer to it

lara [203]

Answer:

168

Step-by-step explanation:

2x80 is 160 plus 2x4 is 8 160+8 is 168

8 0

2 years ago

Read 2 more answers

What is the answer to

katovenus [111]

Answer:

y $\geq$ 2

Step-by-step explanation:

1. switch sides

2. distribute

3. simply (combine like terms) in this case it would go to 22y

4. add 48 to both sides

5. simplify

6. divide

y $\geq$ 2

6 0

3 years ago

7 is 40% of what number

dedylja [7]

40% means 0.4 .

So . . . . . 7 = 0.4 N .

Divide each side by 0.4 . . . N = 7/0.4 = 17.5

3 0

2 years ago

Find the slope of the line passing through the pairs of points and describe the line as rising, falling, horizontal or vertical.

Anna [14]

Answer:

$a.\ m=2,\ \text{the line is rising}\\\\b.\ m=-\dfrac{5}{4},\ \text{the line is falling}\\\\c.\ m=0,\ \text{the line is horizontal}\\\\d.\ m\ is\ unde fined,\ \text{the line is vertical}$

Step-by-step explanation:

The formula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

m > 0, then a line is rising

m < 0, then a line is falling

m = 0, then a line is horizontal

m is undefined, then a line is vertical

(2, 1) and (4, 5)

$m=\dfrac{5-1}{4-2}=\dfrac{4}{2}=2>0\to\text{rising}$

(-1, 0) and (3, -5)

$m=\dfrac{-5-0}{3-(-1)}=\dfrac{-5}{4}=-\dfrac{5}{4}$

(2, 1) and (-3, 1)

$m=\dfrac{1-1}{-3-2}=\dfrac{0}{-5}=0\to\text{horizontal}$

(-1, 2) and (-1, -5)

$m=\dfrac{-5-2}{-1-(-1))}=\dfrac{-7}{0}\ \text{UNDEFINED}\to\text{vertical}$

7 0

2 years ago