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Anettt [7]
3 years ago
9

Can someone tell me how to solve this

Mathematics
1 answer:
Butoxors [25]3 years ago
6 0
X squared+y=18
x+y=6. use elimination method.(+y and +y cancels 
x squared -x=x
18-6=12
x=12
for y take one of the above equations
x+y=6(replace x with 12
12+y=6(collect the like terms
y=6-12
y=-6

so x=12 and y=-6
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Here is a rectangle which has a width of x cm. x cm
miskamm [114]

Answer:

278.25 cm2

Step-by-step explanation:

If the width of the rectangle is x (cm), as the length is 8cm longer, so that the length of the rectangle is: x + 8 (cm).

In the attached image, we can see the length of each side. Total length of the sides are 90 cm.

=> (x + x + 8) + x + 8 + (x+8) + (x + x + 8) + x + 8 + (x +8) = 90

=> 8x + 48 = 90

=> 8x = 90 - 48 = 42

=> x =42/8 = 5.25 (cm)

=> The width of the rectangle is 5.25cm

=> The length of the rectangle is: 5.25 + 8 = 13.25 cm

=> The area of one rectangle is: Length x Width = 5.25 x 13.25 = 69.5625 cm2

As the 8-sided shape is made from 4 rectangles, so that:

Area of 8 sided shape = 4 x Area of the rectangle = 4 x 69.5625 = 278.25 cm2

6 0
3 years ago
Solve each two step problem.
KatRina [158]
That will be 295.25 how ?? You multiply 8.75 by 40 then subtract 55.75 =295.25
7 0
3 years ago
1) There are 80 grams of salt in a 32% solution. Find the weight of the solution
alukav5142 [94]

Answer:

Weight of the solution = 250 grams

Step-by-step explanation:

1) Consider the weight of solution as x grams.

32 % solution = 80 grams salt

32% of x = 80

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x  = (80*100) / 32

x = 250 grams

7 0
3 years ago
Is 10 pounds greater or 10 kilograms
Marat540 [252]
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3 0
3 years ago
What are the length and width of a rectangular traffic sign if the length exceeds the width by 2 inches and the perimeter is 120
Mazyrski [523]
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L = w+2
L+w = 60
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W = 29
L = 31
7 0
2 years ago
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