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valina [46]
3 years ago
13

Simplify the following expression.

Mathematics
1 answer:
ad-work [718]3 years ago
3 0
7-5*[21-33]=7-5*(21-33)=7-5*(-12)=7+60=67
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Please help Need help
Anettt [7]
This problem can be readily solved if we are familiar with the point-slope form of straight lines:
y-y0=m(x-x0) ...................................(1)
where 
m=slope of line
(x0,y0) is a point through which the line passes.

We know that the line passes through A(3,-6), B(1,2)

All options have a slope of -4, so that should not be a problem.  In fact, if we check the slope=(yb-ya)/(xb-xa), we do find that the slope m=-4.

So we can check which line passes through which point:

a. y+6=-4(x-3)
Rearrange to the form of equation (1) above,
y-(-6)=-4(x-3)  means that line passes through A(3,-6) => ok

b. y-1=-4(x-2) means line passes through (2,1), which is neither A nor B
   ****** this equation is not the line passing through A & B *****

c. y=-4x+6  subtract 2 from both sides (to make the y-coordinate 2)
   y-2 = -4x+4, rearrange
   y-2 = -4(x-1)  
   which means that it passes through B(1,2), so ok

d. y-2=-4(x-1)
   this is the same as the previous equation, so it passes through B(1,2), 
   this equation is ok.

Answer: the equation y-1=-4(x-2) does NOT pass through both A and B.
   
8 0
3 years ago
Saturn is about 1.427 x 10^12 miles from the sun. Light travels at approximately 3 x 10^8 miles/second. How long does it take fo
CaHeK987 [17]

<u>Answer:</u>

<em>4,756.66 seconds or 1.321 hours</em>

<em></em>

<u>Here's how I got that:</u>

<em>- Simply use time formula and plug in what you know -</em>

<em>                          </em>t = distance/speed

                                         ↓

              1,427,000,000,000/300000000

                                         ↓

                                t = <u>4,756.66</u>

<em>~That's all folks~</em>

<em>-Siascon</em>

5 0
2 years ago
Hi help and explain pls
PolarNik [594]

Step-by-step explanation:

U = (x - 5)

V = y^3

because we follow the rule

(U+V)^2 = U^2 + 2UV + V^2

factor the expression will be

((x - 5) +  {y}^{3} )((x - 5) +  {y}^{3} )

3 0
3 years ago
What is the slope of the line through points J and L?
NISA [10]

Answer:

Slope: 2/3

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
If 99 candies are needed to fill in a jar, calculate the total candies needed to fill in 108 jars.​
navik [9.2K]

Answer:

10,692 candies

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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