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Radda [10]
3 years ago
5

8x + y = -16 -3x + y= -5

Mathematics
1 answer:
son4ous [18]3 years ago
8 0
<span>Solve for x,y by substitution 
8x-y=13
y=-8x+1
-------
Substitute for "y" and solve for "x"::
8x - (-8x+1) = 13

---
8x+8x-1 = 13
16x = 14
x = 7/8</span>
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Out of a total of 3000 available parking spaces in a mall
guajiro [1.7K]

Answer:

62.5% of the parking spaces are taken.

Step-by-step explanation:

Given

  • Total Spaces = 3000
  • Taken paces = 1875

To determine

What percent of the parking  spaces are taken?

The percentage of taken spaces of the part can be determined using the formula

% of Taken spaces = [Taken spaces / Total Spaces ] × 100

                               = [1875 / 3000] × 100

                               = 0.625 × 100

                               = 62.5%

Therefore, 62.5% of the parking spaces are taken.

7 0
3 years ago
Verify that triangle ABC is equal to DEF . Find the scale factor of triangle ABC to triangle DEF
alexira [117]

Answer:

k =  6 : 5 : 4

Step-by-step explanation:

BC : AB : AC = 18 : 15 : 12 = 6 : 5 : 4

EF : DE : DF = 12 : 10 : 8 = 6 : 5 : 4

5 0
3 years ago
Can someone please help me with my hw 20 points?
Neporo4naja [7]

Answer:

The first equation; x-2y=8

Step-by-step explanation:

Hi there!

We're told that Ty wants to isolate x in one of the equations. To do so in either, he will need to use inverse operations to cancel out values and leave just x remaining on one side of the equation.

In the second equation, he would need to subtract both sides by 6y and then divide both sides by 4 to isolate x. It's a two-step process.

However, in the first equation, he only needs to add 2y to both sides to isolate x.

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7 0
4 years ago
Read 2 more answers
You are mixing two kinds of candy to make 10 pounds of a mixture worth $5.50 per pound. One kind is $6 per pound and the other i
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Answer:

5.60 pounds each

Step-by-step explanation:

This is the dry mixture problem.

Let x = the number of pounds of the first type of candy

Therefore, number of pounds of second type of candy = 10-x

Value of first candy + value of second candy = value of mixture

Value of any candy = cost per pound of candy * weight of candy

Thus:

4x + 6(10 - x) = 5.60(10)

4x + 60 - 6x = 56

-2x + 60 = 56

-2x = -4

x = -4/-2

x = 2

Therefore, the number of pounds of first type of candy = 2 pounds

The number of pounds of second type of candy = 10 - 2 = 8 pounds

Check

$4(2) + $6(8) =

           8 + 48 = $5.60(10)

               $56 = $56

6 0
3 years ago
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