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nlexa [21]
3 years ago
9

Extend Your Skills Perimeter = 30 in.Area = ?​

Mathematics
1 answer:
atroni [7]3 years ago
5 0

Answer:

56

Step-by-step explanation:

the length of the missing side is 7

so 7 x 8 = 56

To find the missing side:

You must add 8 + 8 = 16

Subtract 16 from the total perimeter = 14.

Divide 14 by 2 = 7 you divide by two since there are two missing lengths and when you add them they have to equal to 14.

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a gardenner is designing a new garden in the shape of a trapezoing she wants the short base to be twice the height and loger bas
taurus [48]

Answer:

Height = 5 ft

Short base = 10 ft

Long base = 14 ft

Step-by-step explanation:

Let h = height, a = short base, b = long base.

From the question,

a = 2h

b = a + 4 = 2h + 4

The area of the trapezoid is given by \frac{1}{2}(a+b)h. Thus,

60 = \frac{1}{2}(2h + 2h + 4)h

60 = \frac{(4h  + 4)h }{2}

60 = \frac{4h(h  + 1)}{2}

60 = 2h(h  + 1)

30 = h(h  + 1)

0 = h^2  + h - 30

0 = (h+6)(h-5)

h-5 = 0 or h+6 = 0

h= 5 or h = -6

We discard the negative value of h since it is a measurement and cannot be negative.

h= 5

a= 2h=2\times5=10

b= a+4=10+4=14

6 0
3 years ago
The dimensions of a rectangle can be given by x+9 and x-2. If the area is 60ft^2, what is the value of X?
Veronika [31]

Answer:

6

Step-by-step explanation:

(x + 9) * (x - 2) = 60

x^2 - 2x + 9x - 18 = 60

x^2 + 7x - 18 = 60

x^2 + 7x = 78

FACTORING:

x(x + 7) = 78

x = 6

6 0
3 years ago
charla wants to determine the vertex of the function f(x)=x^2-18x+60 by changing the function into vertex form.
Vlad1618 [11]
x^2-18x+60 =\\
x^2-18x+81-21=\\
(x-9)^2-21

The vertex is (9,-21)
7 0
3 years ago
To get snacks for a class trip, Clare went to the "bulk"
Galina-37 [17]

Answer:6x+9y=75

Step-by-step explanation:

7 0
4 years ago
In 2000 a chesesbuger costed $5.00. In 2015 a cheeseburger costed $6.50 what percent of money has changed?
photoshop1234 [79]

Answer:

Step-by-step explanation:

5 0
4 years ago
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