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andreev551 [17]
3 years ago
6

The elevation of city A is 72 feet above sea level; the elevation of city C is 24 feet above sea level. The elevation of city D

is 1 over 4 of the elevation of city C.
Part A: Write an expression to represent the elevation, in feet, of city D. (5 points)

Part B: Simplify the expression and explain why the answer is negative or positive. (5 points)
Mathematics
1 answer:
Elena-2011 [213]3 years ago
4 0

Step-by-step explanation:

Part A:

In math, the word "of" means "multiplied by".

So if the elevation of city D is 1/4 of the elevation of city C, then our equation is 1/4*C, or C/4

Part B:

But we already know that C = 24, so we can just plug in 24 for C in our equation:

24/4 = 6 feet

Explanation: The answer is positive because when you're dividing two positive integers, there's no possible way to get a negative number.

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inysia [295]
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We can start by finding the gradient, using rise over run. Let's take (10, 4.5) and (20, 9)

Our rise is 9 - 4.5 = 4.5 and our run is 10. Then, our gradient becomes 4.5/10 = 0.45

Now, we can substitute points using the point-slope form.

y - 4.5 = 0.45(x - 10)
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4 0
3 years ago
True or false the square root of 16 is 4 explain why this is true
skad [1K]

true because the square root is a number times itself and 4*4 is 16

4 0
3 years ago
Read 2 more answers
20000×50×45×0×23×5×6+229+466+7+5+8+9+1+2+3+45+6+7+8+9+10. Hope you like question don't answer if you don't want to. Have a great
Lemur [1.5K]
815? but have a great day as well!
4 0
3 years ago
The ratio of two numbers is 4:9. When 5 is subtracted from each of them the new ratio becomes 3:8. Find the numbers.​
natta225 [31]

Answer:

FIRST NUMBER IS 20

AND

SECOND NUMBER IS 45

Step-by-step explanation:

LET THE RATIO BE X

FIRST NUMBER = 4X

SECOND NUMBER = 9X

A/Q,

=}4X - 5 / 9X - 5 = 3 / 8

CRISS CROSS,

=}8 ( 4X - 5 ) = 9X - 5 ( 3 )

=}32X - 40 = 27X - 15

=}32X - 27X = - 15 + 40

=}5X = 25

=}X = 25 / 5

=}X = 5

THEREFORE,

FIRST NUMBER

=} 4X

=} 5 × 4

=} 20

SECOND NUMBER

=} 9X

=} 5 × 9

=} 45

8 0
3 years ago
PLEASE help me at 1 B !!!!
aalyn [17]
it would be 66 cause you know it
8 0
3 years ago
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