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2 years ago

How do I do this? Please help!

Mathematics

1 answer:

const2013 [10]2 years ago

8 0

I already answered this question, if you look back in your questions you should find this answered along with another one. I'll do it again just in case you don't find it.

Answer:

{y,x} = {-4,-2}

Expanation:

Solve by Substitution :

// Solve equation [1] for the variable y

[1] y = 2x

// Plug this in for variable y in equation [2]

[2] -2•(2x) - 8x = 24

[2] - 12x = 24

// Solve equation [2] for the variable x

[2] 12x = - 24

[2] x = - 2

// By now we know this much :

y = 2x

x = -2

// Use the x value to solve for y

y = 2(-2) = -4

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Joe has eaten 2/5 of a pizza.Jane has eaten 1/6 of a pizza how many more pizza has joe eaten than Jane?

jenyasd209 [6]

Joe ate 7/30 more of pizza than Jane. You can just subtract 2 uneven denominators. So you would turn them into 30 because that’s the closest highest number that can go with 5 and 6. Then multiply 2 with 6 which is 12 and then multiply 1 with 5 which is 5 now you can subtract it. 12/30-5/30=7/30.

Final Result: 7/30

3 0

3 years ago

A bus leaves Los Angeles at 8am moving northeast at 60 mph. Three hours later, a truck leaves the same place traveling 1 2/3 tim

love history [14]

Answer:

7.5 hours

Step-by-step explanation:

Using the variable 't' for time, you can set up an equation to find out how long it will take the truck to catch up to the bus. Since the bus is traveling at 60mph and the truck is traveling 1 2/3 times faster, we need to first find the rate of the truck:

1 $\frac{2}{3}=\frac{5}{3}$

$\frac{60}{1}*\frac{5}{3}=\frac{300}{3}=100mph$

Using 't' and the knowledge that they will have traveled the same distance we the truck catches up to the bus and the fact that the truck left 3 hours later:

60t = 100(t - 3) or 60t = 100t - 300

Solve for 't': 60t - 100t = -300 or -40t = -300 so, t = 7.5 hours

5 0

3 years ago

Read 2 more answers

A worker at a factory earns $12 per hour plus 2.50 for each unit produced that hour. The worker earns a total of $27 in one hour

nevsk [136]

Answer:

The total number of units produced is 6 .

Step-by-step explanation:

Given as :

The earning of worker at the factory = $ 12 per hour + $ 2.50 each unit per hour

The total earning of worker per hour = $ 27

Let The total number of unit produced = x

According to question

The wage worker earn per hour + earning × per unit produced that hour = Total earning of worker per hour

Or, $ 12 per hour + $ 2.50 each unit per hour × x = $ 27

Or, $ 2.50 each unit per hour × x = $ 27 - $ 12

Or, $ 2.50 each unit per hour × x = $ 15

∴ x = $\frac{15}{2.50}$

Or, x = 6

Hence The total number of units produced is 6 . Answer

4 0

3 years ago

1. Find the remainder if f(x) = 2x³ + 8x² – 5x + 5 is divided by x – 2.

Hunter-Best [27]

Answer:

The answer to your question is 43

Step-by-step explanation:

2x³ + 8x² - 5x + 5 / x - 2

Process

1.- Use synthetic division

2 8 -5 5 2

4 24 38

2 12 19 43

Quotient 2x² + 12x + 19

Remainder 43

4 0

3 years ago

the vertex of this parabola is at (3,-2). When the x-vaue is 4, the y-value is 3. What is the coefficient of the squared express

bixtya [17]

<h3>Answer: 5</h3>

=========================================================

Explanation:

Vertex form is

y = a(x-h)^2 + k

We are told the vertex is (3,-2), so we know (h,k) = (3,-2)

y = a(x-h)^2 + k will update to y = a(x-3)^2 - 2

--------

Then we also know that (x,y) = (4,3) is a point on the parabola. Plug those x and y values into the equation and solve for 'a'

y = a(x-3)^2 - 2

3 = a(4-3)^2 - 2

3 = a(1)^2 - 2

3 = a - 2

3+2 = a

5 = a

a = 5

This is the coefficient of the x^2 term since the standard form is y = ax^2+bx+c.

4 0

3 years ago