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mote1985 [20]
3 years ago
15

This is what I need help with 1 and 2​

Mathematics
1 answer:
Rama09 [41]3 years ago
6 0

Answer:

1. is no its a dialation and 2. is yes

Step-by-step explanation:

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Solve −8−x=−3(2x−4)+3x . Check your solution.
Nastasia [14]
X=10
-8-x=-3(2x-4)+3x
-8-x=-6x+12+3x
-8-x=-3x+12
-x+3x=12+8
2x=20
x=10
You can check your solution by inputting 10 in all the x’s and solving it:)
4 0
3 years ago
Explain how to find the exact value of sin(570°).
Lena [83]
Quick answer Sin(570) = - 1/2
Comment

570 as an angle contains 1 complete revolution of the terminal arm. The terminal arm begins at the origin and the other (in this case swings around until it records 570° turning around the x axis in an anticlockwise direction.

Anticlockwise means going from 12 o'clock to 9 o'clock to 6 o'clock then 3 o'clock and back to 12 o'clock.

What is 570° (∅) degrees equivalent to?
We keep on subtracting 360 until we get a number between 0 and 360 inclusive.

Written this way 0 ≤∅≤360
570 - 360 = 210°

So we need to find the equivalent of 210° 

Method
210° = 180° + 30°
This means that ∅ is 30° below the x axis in the 3rd quadrant.

Sin(30) = 1/2 
In the third quadrant, the sine is minus. so 
sin(210°) = - 1/2 <<<<<<< Answer 
7 0
3 years ago
Read 2 more answers
The variable y varies jointly with x and w when y = - 42, x = 2, and w = -3.
Andrei [34K]

Answer:

k = 7

Step-by-step explanation:

given y varies jointly with x and w then the equation relating them is

y = kxw ← k is the constant of variation

to find k use the condition when y = - 42, x = 2 and w = - 3 , then

- 42 = k × 2 × - 3

- 42 = - 6k ( divide both sides by - 6 )

7 = k

constant of variation is k = 7

6 0
2 years ago
-2x + 2y=2<br><br> What’s the slope for m and y and b
stellarik [79]

Answer:

y=x+1

m=1

b=1

Step-by-step explanation:

-2x+2y=2

+2x      +2x

2y=2+2x

divide by 2

y=1+x

rewrite

y=x+1

Since b is the y intercept, b would equal 1.

The slope of the line, or m, would be 1 as well.

3 0
3 years ago
Whats the middle number of 31?
docker41 [41]
15.5 15.5 x 2 = 31. hope this helps
6 0
4 years ago
Read 2 more answers
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