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3 years ago

HELP ME! RIGHT NOW!!

Mathematics

2 answers:

leva [86]3 years ago

7 0

Since that angle all together is 180, 100 is 2z-10 and z is 55

Sauron [17]3 years ago

3 0

Step-by-step explanation:

80+(2z-10)=180 {sum of angles in straight line is 180}

80+2z-10=180
70+2z=180
2z=180-70
2z=110
z=110/2
z=55

now, 2z-10=2×55-10

=110-10

=100

therefore z=55 & 2z-10=100

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hodyreva [135]

Answer:

16.3420

Step-by-step explanation:

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2 years ago

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sasho [114]

Answer:

186.5 + 2x

Step-by-step explanation:

First, radify 25. Luckily it's a perfect square so it will be 5.

Second, divide within the parentheses. You're expression should look like this.

(93-5+x+42/8)2

Divide 42/8. The decimal form would be 5.25, while the fraction should be 5 1/4.

Third, solve within the parentheses from left to right. Right now you're expression should look like this:

(93-5+x+5.25)2

Add all like terms

93-5+5.25=93.25

Fourth, multiply. Right now the expression should look like this:

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3 years ago

Katelyn needs to cover her sofa cushions. If each cushion is a 10 in. by 11 in. by 4 in. rectangular prism, and there are 3 cush

Svet_ta [14]

Answer:

1,164 in²

Step-by-step explanation:

the area of 1 sofa cushion =

2× ( 10×11 + 10×4 + 11×4)

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3 years ago

What is an equation of the line that passes through the point 3,-1 and has a slope of 2

vekshin1

An equation that passes through the coordinates (3, -1) and has a slope of 2 would be y=2x-7 because since the slope is positive and is 2/1 the slope rises by 2 and runs 1 to right and eventually passes (3, -1) when it starts at -7 on the y-intercept. Answer: y=2x-7

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3 years ago

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Tamiku [17]

Answer:

Step-by-step explanation:

15. $\frac{cotx+1}{cotx-1} = \frac{cotx+cotx.tanx}{cotx-cotx.tanx} = \frac{cotx(1+tanx)}{cotx(1-tanx)} = \frac{1+tanx}{1-tanx} \\$

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=> The clause is correct

17. Do the same (16)

18. $\frac{sinx}{1-cosx}+\frac{sinx}{1+cosx} = \frac{sinx(1+cosx) + sinx(1-cosx)}{(1+cosx)(1-cosx)} = \frac{sinx + sinx.cosx + sinx - sinx.cosx}{1-cos^{2}x} = \frac{2sinx}{sin^{2}x }= \frac{2}{sinx} = 2cosecx$

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=> The clause is correct

20. Do the same (18)

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Same with (16) => Left = Right => The clause is correct

22. Do the same (21)

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3 years ago