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dybincka [34]
3 years ago
6

What is -2.8 + 0.9 - 12 - 4 simplified. if you know the answer it would help me greatly. thxs

Mathematics
1 answer:
Mumz [18]3 years ago
7 0

Answer:

-17.9

Step-by-step explanation:

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What is an equation of the line that passing through the points (-2, -5) and (4, 7) ?
monitta

Answer:

y=2x-1

Step-by-step explanation:

Use the slope-intercept formula: y=mx+b where m is slope and b the y-intercept.

(-2,-5)(4,7)

Use the slope formula for when you have two points:

\frac{y(2)-y(1)}{x(2)-x(1)}=\frac{rise}{run}

Rise over run is the change in the y-axis over the change in the x-axis. Insert values:

\frac{7-(-5)}{4-(-2)}

Simplify parentheses (negative+negative=positive)

\frac{7+5}{4+2}

Simplify

\frac{12}{6}=2

2 is the slope:

y=2x+b

Now use one of the points to find the y-intercept by substituting the x and y values into the equation. Solve for b:

(4,7)

y=2x+b\\7=2(4)+b

7=8+b\\7-8=8-8+b\\7-8=b\\-1=b\\b=-1

The y-intercept is -1. Insert into the equation. Change the + symbol to -:

y=2x-1

Done.

6 0
3 years ago
Statement: If lines are skew, then they are not coplanar.
ArbitrLikvidat [17]
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5 0
4 years ago
Please help! Three one-inch cubes are stacked. What is the surface area of the composite figure that is formed?​
Vinil7 [7]

Answer:

i think it would just be 3

Step-by-step explanation:

since the surface area of one cube is 1 (1x1x1) and then there is 2 more, you would do 1+1+1 so yea i think its three

3 0
3 years ago
How to solve : 5 + |x| = 14
Daniel [21]

Answer:

5+x=14

-5 -5

0 +x=9

x=9

fill in

5+9=14

so its true

x=9 but it can also be -9 since it's in | |

so x=9 or -9

7 0
3 years ago
The sum of a number and 4 is equal to -43. Find the number
Artist 52 [7]

Answer:

the number is -47..

Step-by-step explanation:

let the number be'x'

  • x+4= -43
  • x= -43-4
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hope it helps.

<h2>stay safe healthy and happy.</h2>
4 0
3 years ago
Read 2 more answers
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