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Lisa [10]
3 years ago
15

Simplify the expression 3x²-5x-4+xy-(2xy+2x²) then evaluate the result if x=-1 and y=6

Mathematics
2 answers:
Anvisha [2.4K]3 years ago
6 0
-6 is what it would be plugging the x and y values in
lidiya [134]3 years ago
5 0
3x²-5x-4+xy-(2xy+2x²) Simplified is x²-5x-4-xy
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Guys please help me this is due tonight thanks
elena-s [515]

Answer:

the student in question bought 3 large notebooks and 3 small notebooks

Step-by-step explanation:

the easiest way to explain how to do this is by recognizing that the student bought $54 worth of notebooks- which is not divisible by 10 easily. that means, we should subtract 8 from 54 until we get a number that IS divisible

54 - 8 = 46 (one small notebook)

46 - 8 = 38 (two small notebooks)

3 8 - 8 = 30 (three small notebooks)

then, divide 30 by 10 to see how many large notebook the student bought.

30/10 = 3

the student in question bought 3 large notebooks and 3 small notebooks

4 0
2 years ago
Need help on geometry please right answer only I’m giving out 40 points
Juliette [100K]
Answer: first option 392.699 square feet.


Explanation:

1) The shape of the sidewalk is an ring with exterior radius equal to the radious of the fountain + 5 feet and inner radius equal to the radius of the fountain.

2) The area of such ring is equal to the area of the outer circle less the area of the inner circle (the fountain)

Area of a circle = π × r²

Area of the outer circle: π (10ft +  5 ft)² = π (15 ft)² = 225 π ft²

Area of the inner circle = π (10ft)² = 100 π ft²

Area of the ring  (sidewald) = 225π ft² - 100π ft² = 125π ft² = 392.699 ft²
6 0
3 years ago
Read 2 more answers
Scientists in Florida are measuring the masses of sea turtles as they hatch. They create a line graph and plots the masses of 18
NeTakaya

Answer:

36 3/4

Step-by-step explanation:

12 1/4 + 12 1/4 + 12 1/4 = 36 3/4 :)

8 0
3 years ago
Asappppp!!!!!!!!!!!!!!!!!!!!!!!!
Scrat [10]
42 because x is equal to its corresponding side
7 0
3 years ago
A man is on exit 64 at 12:13 he arrived at exit 148 at1:33 was he speeding
Masteriza [31]
Depends on the speed of the road assuming 65 or faster no they were not speeding. At 60 yes they were but not by much lol
5 0
2 years ago
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