MATHEMATICS MIDDLE SCHOOL

What shape will you get if you put 3 diamonds together

Answers

Answer 1
Answer:

I think just a trapezoid no others

Hope I helped, Good luck

 = )
Answer 2
Answer: I believe you will get a rectangle.

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At a school fair 70% of the people are under 16 years old. One-third of the people remaning are teachers. If there are 21 teachers at the fair, how many people are there at the fair total

Answers

Let's write out what we do know...

70% of the people are under 16 years old

From this information, we can infer that 30% of the people are 16 or older.

100%-70%=30%

1/3 of the people 16 or older are teachers. There are 21 teachers.

1/3 of 30% is 10%

1/3*.30=.10 or 10%

So 21 is 10% the total number of people at the fair.

(10)/(100)= (21)/(x) 2100=10x 210=x

(I cross multiplied and then divided both sides by 10 to get x=210)

There are 210 people at the fair.
30% remains
a third of 30% is 10%
so 10% are teachers
21 (amount of teachers) × 10 = 210
answer = 210

How many zeros are in the product 6 times 5 times 10

Answers

tw00 zeros get it tw00 
there is 2 zeros in 300

Find the missing measure in each pair of similar shapes.

Answers

If your missing a sid but you have the other side opisite sides are the same

What is 85 yd equal to in feet. Why

Answers

85 yards is equal to 255 feet because there are 3 feet in a yard so all you have to do is multiply 85 times 3 and you get 255 feet
85 yards is 225 feet because of the metric system.

Find the value of B - A if the graph of Ax + By = 3 passes through the point (-7, 2), and is parallel to the graph x + 3y = -5. Pls help ASAP btw, the answer isn’t -12/19 or 12/19

Answers

Answer:

B - A = -6

Step-by-step explanation:

Given

Point: (-7,2)

x + 3y = -5

Required

Find B- - A in Ax + By = 3

To start with; we need to calculate the slope of x + 3y = -5

x + 3y = -5

Subtract x from both sides

x - x + 3y = -5 - x

3y = -5 - x

Divide both sides by 3

(3y)/(3) = -(5)/(3) - (x)/(3)

y = -(5)/(3) - (x)/(3)

The slope of the line is the coefficient of x

Slope = - (1)/(3)

The question says line Ax + By = 3 is parallel to line x + 3y = -5; This means that they have the same slope of - (1)/(3)

Having calculated the slope, next is to calculate the equation of the line using the following formula;

m = (y - y_1)/(x - x_1)

Where m is the slope; m = - (1)/(3); (x_1, y_1) = (-7,2)

Substitute these values in the formula above; the formula becomes

-(1)/(3) = (y - 2)/(x - -7)

-(1)/(3) = (y - 2)/(x +7)

Cross Multiply

-1(x+7) = 3(y-2)

Open brackets

-x - 7 = 3y - 6

Add x to both sides

x - x - 7 = 3y - 6 + x

-7 = 3y - 6 +x

Add 6 to both sides

-7 + 6 = 3y -6 + 6 + x

-1 = 3y + x

Multipby both sides by -3

-3(-1) = -3(3y + x)

3 = -9y - 3x

-9y - 3x = 3

-3x - 9y = 3

Comparing the above to Ax + By = 3

Ax = -3x\nA = -3

By = -9y\nB = -9

B - A = -9 - (-3)

B - A = -9 + 3

B - A = -6

What is 3/5 times 20

Answers

First make 20 into a fraction, then solve; 3/5 · 20/1. 60/5 = 12. Hope that helps!

Answer:

your answer should be 12

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