Multiply: (3x – 5)(–x 4) Applying the distributive property, the expression becomes (3x)(–x) (3x)(4) (–5)(–x) (–5)(4). What is the simplified product in standard form? x2 x.

Answer:none there are not proportional

Step-by-step explanation:

Answer:

1. congruent

2. supplementary

Answer:

y = x^2 - 2x - 8

Step-by-step explanation:

First we can put it into vertex form, the vertex is at (1, -9)

y = a ( x − h )^2 + k .

y = 1 (x - 1)^2 - 9

Then distribute:

y = x^2 - 2x + 1 - 9

y = x^2 - 2x - 8

Answer:

The rate of change, aka slope, represents the cost per food item.

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Explanation:

We can use the slope formula

[tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex]

Pick any two rows in the table. Let's say we go for (1,8) and (2,16)

The slope through those points is...

[tex]m = \frac{y_2-y_1}{x_2-x_1}\\\\ m = \frac{16-8}{2-1}\\\\ m = \frac{8}{1}\\\\ m = 8[/tex]

You'll get the same value for any other two rows as well.

This slope is the unit rate which is the cost per hamburger.

Or you could simply look at the row that has (x,y) = (1,8) to see this unit cost really quickly without having to do any math at all. This works because the line y = 8x goes through the origin.

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The hot dogs will follow the same calculation. Pick any two points, find the slope, and that slope is the unit rate aka unit price.

You should find the unit price is $4.

Note how (1,4) is a point on the blue line. So we have a similar situation to the hamburgers. This line y = 4x also goes through the origin.

Answer:

45+50 =5(9+10)

Step-by-step explanation:

5 times 9 and 5 times 10

Answer:

y = -x - 4

Step-by-step explanation:

the equation of a linear graph is y = mx + b

you know the m = -1

so now the equation is y = -x + b

from here, what you could do to find b is...

plug (-1, -3) into the equation

1) x = -1, y = -3

2) -3 = -(-1)  + b

3) -3 = 1 + b

4) -4 = b

or you can look at the y-intercept which is where the line intersects with the y-axis

it seems to be (0, -4)

so "b" would be equal to -4

this makes the final equation y = -x + (-4) or y = -x - 4

Answer:

see explanation

Step-by-step explanation:

Using the identities

sec x = [tex]\frac{1}{cosx} [/tex]  ,  csc x = [tex]\frac{1}{sinx} [/tex]

sin²x + cos²x = 1

Consider the left side

[tex]\frac{cos0}{sec0} [/tex] + [tex]\frac{sin0}{csc0} [/tex]

= [tex]\frac{cos0}{\frac{1}{cos0} } [/tex] + [tex]\frac{sin0}{\frac{1}{sin0} } [/tex]

= cos²Θ + sin²Θ

= 1 = right side , thus proven

Answer:

C

Step-by-step explanation:

Hope this helped <3

Answer:

x=2/3

Step-by-step explanation:

(2x+1)/2 = 2 1/3/4

Multiply 4 on both sides:

2x+1=2 1/3

Rewrite:

2x+1=7/3

Subtract 1 on both sides:

2x=4/3

Divide 2 on both sides:

x=2/3

Thus x=2/3

Hope this helps!

Answer:

Step-by-step explanation:

3 gallons because 3/4 of a gallon covers 1/4 of a wall so you multiply the amount of gallons used for a wall times 4 which is 12/4 (keep the denominator the same ) and then divide 12 by 4 which is 3 gallons

Answer:

the value of the expression is 10.

Step-by-step explanation:

If we simply substitute the values, we get:

Hope this helps!!

6a + 2b = 6 • 1 + 2 • 2 = 6 + 4 = 10

6a + 2b = 10

please give brainliest

Answer:

Step-by-step explanation:

Where's the graph?

Answer:

31

Step-by-step explanation:

Answer:

423/500

Step-by-step explanation:

Answer:

1. 1,500

2. 1,100

3. 3,000

Step-by-step explanation:

1. 3*500=1500

2. 1500-400=1100

3. 2*5=10

10*300=3000

Answer:

$14

Step-by-step explanation:

A $2 fee means that to even enter into the taxi, you need to pay $2.

If the taxi driver charges $4 per mile, and we need to go 3 miles, we can simply multiply 3 x 4 to get $12.

But Remember!! We need to add $2 for the fee. 12 + 2 = 14

3 miles is $14

Answer:

x = 35     y = 45

Step-by-step explanation:

Total number of strings:  x + y = 80  ⇒  x = 80 - y

Substitute  x = 80 - y  into  4.5x + 1.5y = 225  to find y:

4.5(80 - y) + 1.5y = 225

360 - 4.5y + 1.5y = 225

                      3y = 135

                        y = 45

Substitute the found value of y into  x + y = 80  to find x:

x + 45 = 80

x = 80 - 45 = 35

To solve the problem we must know about the system of equations.

A system of equations to have no real solution, the lines of the equations must be parallel to each other.

1. Dependent Consistent System

A system of the equation to be Dependent Consistent System the system must have multiple solutions for which the lines of the equation must be coinciding.

2. Independent Consistent System

A system of the equation to be Independent Consistent System the system must have one unique solution for which the lines of the equation must intersect at a particular.

The number of premium and standard strings Kenny ordered are 35 and 45 respectively.

Given to us

Total Number of Strings

= number of premium strings + number of standard strings

80 = x+ y

Solving for y,

y = 80-x

Total Cost of all strings

($4.50)x + ($1.50y) = $225

4.50x + 1.50y = 225

Substitute the value of y,

[tex]4.50x + 1.50(80-x) = 225\\\\4.50x +120 -1.5x = 225\\\\4.50x-1.5x = 225-120\\\\3x = 105\\\\x=\dfrac{105}{3}\\\\x = 35[/tex]

Thus, the number of premium strings Kenny ordered was 35.

Substitute the value of x in the equation of y,

y = 80 - x

y = 80 - 35

y = 45

Thus, the number of standard strings Kenny ordered was 45.

Hence, the number of premium and standard strings Kenny ordered are 35 and 45 respectively.

Learn more about System of Equations:

https://brainly.com/question/12895249

Answer:

$ 54

Step-by-step explanation:

Barbara bought :

5 tickets ⇒ $ 30

And now let the costs of 9 tickets be x :

9 tickets ⇒ $ x

So,

5 tickets ⇒ $ 30

9 tickets ⇒ $ x

Now use cross multiplication to find the value of x :

5 x = 9 × 30

5 x = 270

Now divide both sides by 5.

x =  $ 54

Hope this helps you :-)

Let me know if you have any other questions :-)

Answer:

lets first number is x, so second number is

(x+32),

The sum of these numbers is 186 so

x+(x+32)=186

2x+32-186 2x=154

x=77

second number is x+32=77+32=109 Answer: numbers are 77 and 109

Answer: x × 15.6

The word "times" in the question indicates that we need to multiply a number x with 15.6.

Hope that helps...

Answer : B, D

Step - by - step explanation :

6/16 Divided by 2/2 --> 3/8 ( so it's not 2/8 )

6/16 Multiplied by 2/2 --> 12/32 ( so it's not 12/18 )

30/80 --> 3.75 6/16 --> 3.75

First, simply 6:16 to 3:8.

Now, choose ratios from there.

B) is 3:8 so that one works.

D) works also, because you just multiply each side by 10.

Answer: B and D

Answer: One piece is 60 cm and the other is 100cm

Lets think, "x" as the length of each piece.

3 + 5 is 8. So,

x/160 = 3/8

x= 3/8*160

x= 60

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x/160 = 5/8

x= 5/8 * 160

x= 100

Brainliest pls if it was correct!

5x-5y=4x+18

move 5y and 4x and 18

5x-4x-18=5y

x-18=5y

y=1/5x-18/5

Answer:

6 1/4

Step-by-step explanation:

my bad if it's wrong

Answer:

6 1/4 cups of flour

Step-by-step explanation:

First we can add up the amount of flour needed for the cake and the cookies:

3 3/4 + 8 = 11 3/4 cups

Since he only has 5 1/2 cups of flour, we can subtract 5 1/2 from 11 3/4 to get the amount of flour he needs.

11 3/4 - 5 1/2 = 11 3/4 - 5 2/4 = 6 1/4