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lapo4ka [179]
3 years ago
7

The dimensions of a rectangular garden were 3 m by 10 m. When both dimensions were increased by equal amounts, the area of the g

arden doubled. Find the dimensions of the new garden.
Mathematics
1 answer:
Helen [10]3 years ago
4 0

A=l*w

A=3*10

30=A

add x to l and w the area doubled

60 = (3+x)(10+x)

FOIL

60 = 30 +3x+10x+x^2

60 = x^2 +13x+30

subtract 60 from each side

0=x^2 +13x-30

factor

0=(x+15) (x-2)

x+15=0  x-2=0

x=-15  x=2

x cannot be negative so x=2

new dimensions

3+2, 10+2

Answer: 5m ,12m

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Wittaler [7]

Answer:

x>-2

Step-by-step explanation:

13+x>11

Subtract 13 from each side

13-13+x>11-13

x>-2

5 0
3 years ago
Conner scored 4,370 points in a game.Amy scored 1,089 fewer points then Conner how many points did Amy scored
statuscvo [17]
SOLUTION:

Connor's score = 4, 370 points

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Amy's score = 3, 281 points

Therefore, Amy scored 3, 281 points.

Hope this helps! :)
Have a lovely day! <3
3 0
3 years ago
The area of a parallelogram is 96 cm squared the height is 4 cm less than the length what is
andrey2020 [161]
Area of paralellogram=legnth times height

l=legnth
h=height
area=96

lh=96

h is 4 less than l
h=-4+l
sub
l(-4+l)=96
-4l+l^2=96
minus 96 both sides
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factor
(l-12)(x+8)=0
set to zero
l-12=0
l=12

l+8=0
l=-8, imossible, legnth cannot be negative, disreagard this soultion

legnth=12cm
8 0
2 years ago
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5 0
3 years ago
Jeanette's salary is 25000 a year she gets a 4% raise annually, how much will she have after 7 years
Mars2501 [29]
25,000 x .04 = 1000 a year......
so 7,000 after 7 years

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