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xenn [34]
2 years ago
12

Pls help me this i due today

Mathematics
1 answer:
finlep [7]2 years ago
8 0

Step-by-step explanation:

due to the rules of crossing lines and their angles, the 2 angles opposite of each other must be equal.

so,

7x + 7 = 112

7x = 105

x = 15

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Rob and Amy each improved their yards by planting rose bushes and shrubs. They bought their supplies from the same store. Rob sp
Dmitriy789 [7]

Answer:

The cost of one rose bushes be $10 and the cost of shrubs $4.

Step-by-step explanation

Let us assume that the cost of rose bushes be x .

Let us assume that the cost of shrubs be y .

As given

Rob and Amy each improved their yards by planting rose bushes and shrubs.

They bought their supplies from the same store.

Rob spent $100 on 8 rose bushes and 5 shrubs.

Than the equation

8x + 5y = 100

Amy spent $112 on 8 rose bushes and 8 shrubs.

8x + 8y = 112

Than the two equation

8x + 5y = 100 and  8x + 8y = 112

Subtracting 8x + 5y = 100 from 8x + 8y = 112

8x - 8x + 8y - 5y = 112 - 100

3y = 12

y = \frac{12}{3}

y = $4

Put in the equation 8x + 5y = 100 .

8x + 5 × 4 = 100

8x + 20 = 100

8x = 100 - 20

8x = 80

x = \frac{80}{8}

x = $10

Therefore the cost of one rose bushes be $10 and the cost of shrubs $4.


7 0
4 years ago
Solve the following equation algebraically:
weeeeeb [17]
It’s definitely d. -96,96
7 0
3 years ago
Read 2 more answers
Pls answer and quick, i'll give brainlist
worty [1.4K]

Answer:

17.5

Step-by-step explanation:

5*3.5

7 0
3 years ago
Where is the answer to the expression 3 − 7 located on a horizontal number line?
netineya [11]

Answer:

4 units to the left of 3 7 units to the left of 3 4 units to the right of 3 7 units to the right of 3

Step-by-step explanation:

5 0
3 years ago
A couple of newlyweds decides to s their house with a brand new white picket fence. They purchase 120 feet of fencing materials.
Allisa [31]

Answer:

option (A) 900 ft²

Step-by-step explanation:

Let the length be L and width of the area be 'B'

now,

Perimeter of the fence = 2 (L + B)

also,

2 (L + B) = 120 feet

or

L + B = 60 ft

or

L = 60 - B ft

Now,

The area of the fencing ground, A = LB

or

A = (60 - B)B

A = 60B - B²

now,

differentiating the area with respect to width B, we get

\frac{dA}{dB}= \frac{d(60B - B^2)}{dB}

or

\frac{dA}{dB} = 60 - 2B

for point of maxima or minima, put \frac{dA}{dB} = 0

thus,

60 - 2B = 0

or

2B = 60

or

B = 30 ft

to check for maxima or minima

\frac{d^2A}{dB^2} = - 2

since,

\frac{d^2A}{dB^2} is negative, B = 30 ft is point of maxima

therefore,

L = 60 - B = 60 - 30 = 30 ft

Thus,

Maximum area of the fencing ground = 30 × 30 = 900 ft²

Hence,

The correct answer is option (A) 900 ft²

7 0
3 years ago
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