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BARSIC [14]
2 years ago
5

I need help on 5-7. Its a little confusing for me

Mathematics
1 answer:
Len [333]2 years ago
8 0

Answer:

5. x = 5, y = 3

6. x = 0, y = 4

7. x = -1, y = 1

Step-by-step explanation:

5. substitute 3(value of y) into the equation y = x - 2:

=> 3 = x - 2

=> x = 5

6. substitute 0(value of x) into the equation y = x + 4:

=> y = 0 + 4

=> y = 4

7. substitute 1(value of y) into the equation y = 2x + 3:

=> 1 = 2x + 3

=> 2x = -2

=> x = -1

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4 0
2 years ago
Two students Stella and vladmir complete the conversion statement 12 feet 8 inches = blank inches.
yuradex [85]

Answer:

so stella is right if thats what you ae asking

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3 0
3 years ago
It takes 8 hours for 4 men to paint a room.
eimsori [14]

Answer:

16 men would be needed to paint the room in 2 hours

Step-by-step explanation:

We can use proportion to solve the problem given, but first we need to determine whether it is a direct or indirect proportion.

If the number of men are increase, the time taken to do the work will decrease, If the number of men are decrease, the time taken to do the work will increase. Therefore, this is an indirect proportion.

We are going to arrange the data inversely.

Let x be the number of men needed to paint the room in two hours

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Cross-multiply

2×x = 8×4

2x = 32

Divide both-side of the equation by 2

2x/2 = 32/2

x = 16 men

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7 0
3 years ago
A student has gotten the following grades on his tests. What is the minimum grade he must get on the last test in order to have
steposvetlana [31]
In order to get an 81 average, 
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71+96+90+73+?=405
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3 0
3 years ago
Boskyville is planting trees along both sides of its streets. the trees will be planted 50 feet apart. the first tree on the blo
tresset_1 [31]
The first thing we are going to do for this case is to define the following variable:
 x = number of trees.
 We then have that the equation that represents the problem is given by:
 y = 50 (x-1) + 20
 Rewriting:
 y = 50x - 50 + 20
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 Substituting for y = 390 we have:
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 We clear x:
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 nearest whole integer
 x = 8
 Answer:
 
will be planted along one block about 8 trees.
5 0
3 years ago
Read 2 more answers
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