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Anna71 [15]
3 years ago
15

Evaluate the expression when x = 3 and y=-7. x-8y

Mathematics
1 answer:
Simora [160]3 years ago
4 0

Answer: 59

Step-by-step explanation:

3 - 8(-7)

3 - (-56)

3 + 56 = 59

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Jared measured a house and its lot and made a scale drawing. The scale of the drawing was 5 millimeters : 3 meters. The actual l
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Answer:

115mm

Step-by-step explanation:

5/x = 3/69

5/x = 1/23

5*23 = x

115 = x

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Find the product. (-5a 2)3 · a 5 -15a10 -125a11 15a6 -125a10
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The correct answer is not up there. its -125a^7
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Lily's car has a fuel efficiency of 888 liters per 100 kilometers.
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Cynthia Besch wants to buy a rug for a room that is 1919 ft wide and 2727 ft long. She wants to leave a uniform strip of floor a
yulyashka [42]

Answer:

The dimension of the rug would be 17 ft × 9 ft.

Step-by-step explanation:

Given

length of the room = 27 ft.

width of the room = 19 ft.

suppose, she leaves a uniform strip of x ft. around the rug.

So,

The length of rug = (27-2x)ft.

Width of rug= (19-2x)ft.

∴ Area of the rug= length×width

                            =  (27-2x)(19-2x)

                            =  513-54x-38x+4x^2

                            =   513-92x+4x^2

According to the question,

513-92x+4x^2=153

513-92x+4x^2-153=0        ( subtract 153 both sides)

4x^2-92x+360=0

4(x^2-23x+90)=0

x^2-23x+90=0

x^2-(18+5)x+90=0            ( Middle term splitting)

x^2-18x-5x+90=0

x(x-18)-5(x-18)=0

(x-5)(x-18)=0

x-5=0 or x-18=0             ( zero product property)

x=5 or x=18

if x=18, dimension would be negative  ( Not possible)

Thus, x= 5

Hence,

length of rug= 27-10=17 ft.

width of rug= 19-10=9 ft.

8 0
3 years ago
How many were involved in scouting
Anastaziya [24]
Add it together, it should be 1,532,482 (I think)
4 0
3 years ago
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