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3 years ago

13

Ezra measured a swimming pool and made a scale drawing. He used the scale 9 millimeters = 1 meter. What is the scale factor of t

he drawing?

1 answer:

mr Goodwill [35]3 years ago

6 0

1mm = .11m

You can get this by simplifying the numbers you already have

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there are 341 pine trees and spruce trees in woodlot. 122 trees were pine. what fraction of the trees were spruce?

Olenka [21]

Answer:

219 over 1000

Step-by-step explanation:

3 0

2 years ago

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

Complete the following equation: a2 = b2 + c2 - ______.

Dima020 [189]

Answer:

2 bc cos A

Step-by-step explanation:

Cosine rule

8 0

3 years ago

PLEASE HELP !!!

katen-ka-za [31]

Answer:

final cost of 3 pounds: <u> 8 dollars </u>

final cost of p pounds: <u> 3.75p - 3.25 dollars </u>

Step-by-step explanation:

Each pound costs $3.75, so 3 pounds cost 3*3.75 = 11.25 dollars. Subtract off the $3.25 to get the final cost to be 11.25-3.25 = 8 dollars. This takes care of the first part.

For the second part, the expression for the final cost is 3.75p - 3.25; where the 3.75p is the cost before the coupon is applied. If you plugged p = 3 into that expression, you should get 8 as a result. The variable p is some positive whole number. It's a place holder for the number of pounds of apples.

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2 years ago

Evaluate using distributive property <br> 16 x ( -3/8)+16 x 1/4

geniusboy [140]

Answer now now now now

8 0

3 years ago