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Sedaia [141]
3 years ago
14

Solve the following system of equations. -3x + 5y = 80 x + 5y = 40 A. x = -10, y = 10 B. x = 2, y = 17.2 C. x = 8, y = 6.4 D. x

= 10, y = -10
Mathematics
1 answer:
hammer [34]3 years ago
5 0
-3x+5y=80 if the x = -10 and y = 10
x+5y=40 if the x= -10 and y= 10
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josie cast a shadow of 6ft and she is 5 ft 6 in tall. A building cast a shadow of 18 ft at the same time that josie measured her
Debora [2.8K]
Josie's height = 5 ft 6 in. = 5 1/2 ft = 11/2 ft.
Josie's shadow = 6 ft.

Ratio of shadow to height = 6 / 11/2 = 12/11
So, It would be equal to ratio of building's shadow to building's height.

18/x = 12/11
x = 18*11 /12
x = 3*11 / 2
x = 16.5

In short, Your Answer would be 16.5 Feet

Hope this helps!

6 0
3 years ago
What is the equation of the line that passes through the points 15, nine and -2, nine
olasank [31]

Answer:

y=9

Step-by-step explanation:

y=mx+c

gradient of a horizontal line is 0

y=0x+9

y=9

5 0
3 years ago
Morgan is 23 years old. Her grandfather is 4 times as old. How old is her grandfather?
natka813 [3]

Answer:

92 years old

Step-by-step explanation:

Multiply 23 by 4

92

So Morgan's grandfather is 92 years old

Hope this helps :)

Please consider Brainliest :)

3 0
2 years ago
Read 2 more answers
What is the slope of the line that passes through the points (14, 5) and (20, –4)? A. -3/2 B. -2/3 C. 2/3 D. 3/2
Lynna [10]
The slope of the line that passes through the points (14/5) and (20, -4), so you take y-y/x-x so you substitute the y's in for 5 and -4 and x in for 14 and 20.

5--4/ 14-20
9/-6
Then you make the fraction smaller! 
-3/2 = Answer <span />
6 0
3 years ago
Please can help me with this problem ? Thanks
larisa86 [58]
Order the numbers by magnitude (size) and watch the negative signs:

-12, -1, 0, 2, 15, 18

Answer: C 
7 0
2 years ago
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