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Arisa [49]
4 years ago
13

SOLUTION: y = 5x +7 what is the value of y

Mathematics
1 answer:
sukhopar [10]4 years ago
3 0
Without more info you cannot answer this question numerically.  What is the given value of x?

Let's write y = 5x + 7 as a function:  f(x) = 5x + 7.

Now if x=1, f(1) = 5(1) + 7 = 12

If x= -10, f( -10) = 5(-10) + 7 = -50 + 7 = -43

and so on.  

The given function is represented by the straight line graph through (0, 7) with slope of 5.
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What is 2x-4. I really don’t understand
ddd [48]

Answer:

2 * -4 = -8

Step-by-step explanation:

2 * -4 = -8

It is just like multiplying two numbers like... 2 * 4 = 8

You must need to know that:

+a * -b = -c

-a * -b = +c

+a * +b = +c

In your question;

+a * -b = -c

a = 2

b = -4

c = -8

therefore:

2 * -4 = -8

3 0
3 years ago
Can someone help? Solve for x
Luba_88 [7]
The answer is A) x = 9

We know this because every four sided figure has angles that measure up to 360. So we can subtract all of the angles and then use the remaining angle to solve the problem. 

360 - 90 - 90 - 99 = 81. 

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x^2 = 81
x = +/-9 

Since +9 is the only answer that makes sense in this case, x = 9. 
8 0
3 years ago
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An item on sale costs 60% of the original price. If the original price was $30, what is the sale price?
jolli1 [7]

Answer: $18

Step-by-step explanation:

60% of original cost means 40% is taken off

40% = 0.4

30 x 0.4 = 12 so that is how much will be taken off

30-12= 18

$18

8 0
3 years ago
7x + 5 = 3(2x + 3) + x - 4​
Vika [28.1K]

Answer:

7x+5=7x+5 they are equal same lines

Step-by-step explanation:

6 0
3 years ago
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I need help please????
Feliz [49]

Answer:

x = - 1

Step-by-step explanation:

Given

3x + 2 = y and y = - 1

Substitute y = - 1 into the equation and solve for x, that is

3x + 2 = - 1 ( subtract 2 from both sides )

3x = - 3 ( divide both sides by 3 )

x = - 1

This is verified by the point on the graph with coordinates (- 1, - 1)

8 0
3 years ago
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