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bija089 [108]
2 years ago
6

The lengths of the sides of a square are represented by the expression 3x + 1 cm. The perimeter of the square is 28 cm. What is

the value of x
Mathematics
1 answer:
pshichka [43]2 years ago
7 0

Answer:

x=2

Step-by-step explanation:

Perimeter of a square = 4*(side of the square)

28 = 4*(3x+1)

28 = 12x + 4

28- 4 = 12x

24 = 12x

x =2

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the length of a rectangle is 5 inches more then the width. the area of the rectangle is equal to 2 inches more than 4 times the
Svet_ta [14]
P = 2(L + W)
L = W + 5
A = 4P + 2

P = 2(W + 5 + W)
P = 2(2W + 5)
P = 4W + 10

A = 4P + 2
A = 4(4W + 10) + 2
A = 16W + 42

A = L * W
A = W(W + 5)
A = W^2 + 5W

W^2 + 5W = 16W + 42
W^2 + 5W - 16W - 42 = 0
W^2 - 11W - 42 = 0
(W + 3)(W - 14) = 0

W - 14 = 0
W = 14 <==

L = W + 5
L = 14 + 5
L = 19 <==

P = 2(19 + 14)
P = 2(33)
P = 66

A = L * W
A = 19 * 14
A = 266

answer : length = 19, width = 14....perimeter = 66....area = 266
5 0
3 years ago
NEED HELP WILL GIVE BRAINLEST
Elanso [62]

Answer:

The answer is 2

Step-by-step explanation:

3/4÷ 3/8 =

3 × 8 * 4 × 3 =

24/12 =

<u>24 ÷ 12</u>

12 ÷ 12 = 2

6 0
2 years ago
Please help me find the perimeter.​
slavikrds [6]

Answer:

31.42 cm (rounded up to two decimal places)

Step-by-step explanation:

We first find the circumference of the semi-circle segment:

The circumference will be given by; \frac{1}{2} × π × D (where D is the diameter)

The diameter is 6 cm so circumference is;

\frac{1}{2} × π × 6 cm = 9.42 cm (rounded up to two decimal places)

The perimeter of the figure therefore is;

8cm + 6 cm + 8 cm + 9.42 cm = 31.42 cm

8 0
3 years ago
Select the point that is a solution to the system of inequalities. Yx^2-4?
ziro4ka [17]

Answer:

C (1,2)

Step-by-step explanation:

The point that is a solution must satisfy both inequalities;

The inequalities are;

y\:

y\:>\:x^2-4

Point A

(4,0)

0\:: True

0\:>\:16-4:False

Point B (0,4)

4\:: False

4\:>\:0-4:True

Point C (1,2)

2\:: True

2\:>\:1-4:True

Point D(-2,-4)

-4\:: True

-4\:>\:4-4:False

The correct answer is C.

4 0
3 years ago
Which is the correct expansion of (3x + 2y)5?
Kisachek [45]

Answer:

15x +10y

Step-by-step explanation:

Just multiply 5x and 2y times 5 and don't combine them since they are different terms.

5 0
2 years ago
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