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3 years ago

There are 80 students total in 7th grade, of whom 15% are left handed. How many

1 answer:

5 0

15% translates to 15/100 as a fraction.

If you multiply that by the number of student there are (80) you’d get the 15% of students who are left handed.

80(15/100)=12

12 students are left-handed

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Factor completely by grouping: 6x² + 2x + 9x +3 is

masha68 [24]

Answer:

(2x+3)(x+1)

Step-by-step explanation:

6x² + 2x + 9x +3

(6x² + 2x) + (9x +3)

2x (x+1) + 3 (x+1)

(2x+3)(x+1)

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3 years ago

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Which line is perpendicular to the line y=-1/3x-2 and passes through point (1,4)

xxMikexx [17]

Answer:

Option 3) y = 3x+1

Step-by-step explanation:

Given equation is:

y = $-\frac{1}{3} x -2$

Perpendicular => It will have a slope of negative reciprocal to this slope

So the ⊥ line has a slope = m = 3

Now,

Point = (x,y) = (1,4)

So, x = 1, y = 4

Putting this in slope intercept form to get b

=> $y = mx+b$

=> 4 = (3)(1) + b

=> b = 4-3

=> b = 1

Now, Putting m and b in the slope intercept form to get the required equation:

=> y = 3x+1

4 0

3 years ago

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In triangle A B D , the measure of angle A is 10 degree less than the measure of angle B . The measure of angle D is 20 degree m

elixir [45]

Answer:

Measure of angle A is 27 7/9 degrees.

Step-by-step explanation:

Lets call measure of angle A is X-10

Lets call measure of angle B is X

Lets call measure of angle D is 2.5X+20

We know that the sum of triangles add up to 180 degrees

X+X-10+2.5X+20=180

X=37 7/9

So measure of angle A is 27 7/9 degrees.

I hope this is right. :)

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3 years ago

What is the answer and how to solve it and give me the right answer

Keith_Richards [23]

Answer:

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Step-by-step explanation:

there is 2 grey marbles so 2/10 (there is 10 marbles altogether)

so half of 2 is 1 and half of 10 is 5

so the answer is 1/5

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3 years ago

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Likurg_2 [28]

Answer:

the 1st one

Step-by-step explanation:

I passes it in the quiz

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3 years ago