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kati45 [8]
3 years ago
11

Evaluate 5 + 6 · 2 – 8 ÷ 4 + 7 using the correct order of operations.

Mathematics
1 answer:
allsm [11]3 years ago
6 0

Answer:

22

Step-by-step explanation:

5+12-2+7

17-2+7

15+7

22

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What is the y-intercept of the line perpendicular to (1,1) and (-3,-1) and passes through (-3,-2)
marin [14]

Answer:

-8

Step-by-step explanation:

Let's first establish the reference line (the one that the second line will be perpendicular to).  We are told that this line passes through two points:

(1,1) and (-3,-1).

We'll find a line equation using the point slope form format to start:  

(y - y1) = m * (x - x1), where m is the slope and the x and y are from two points.

(x,y) = (1,1)

(x1,y1) = (-3,-1)

Rearrange the equation:

(y - y1) = m * (x - x1)

m = (y - y1)/ (x - x1)

m = (1-(-1))/(1-(-3))

m = 2/4, or 1/2:  The slope is 1/2.    [<u>This is "m."]</u>

We can use the slope-intercept form for this line (y=mx + b) and then calculate b, the y-intercept:

y = (1/2)x + b

Use either of the two given points.  I'll use (1,1) since I have memorized the "1" math tables.

y = (1/2)x + b  

1 = (1/2)(1) + b for (1,1)

b = 1/2

This makes the reference line:  y = (1/2)x+(1/2)

===

The line perpendicular must have a slope that is the negative inverse of (1/2).  This would be -(2/1), or -2.

We can then write y = -2x + b

To find be, enter the one given point for this line:  (-3,-2)

y = -2x + b

-2 = -2(-3) + b

-2 = 6 + b

b = -8

The perpendicular line is thus:

y = -2x - 8

It has a y-intercept of -8

5 0
2 years ago
The sequence follows a minus 3 pattern: 12, 9, 6, 3, ....
hram777 [196]
X times -3= a
i think thats it
3 0
3 years ago
Your teacher is giving a test that is made up of 3 point questions and5 point questions the test is worth 100 points and has 28
Troyanec [42]

Answer:

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Step-by-step explanation:

I hope you have a blessed day!

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