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3 years ago

Evaluate the expression when x = -6 x^2 + 5x - 3

Mathematics

1 answer:

Dafna11 [192]3 years ago

4 0

substitute the value of the variable into the equation and simplify.

the answer is 3.

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Mr.majors ordered six hot dogs and a bucket of popcorn at the concession stand. If the popcorn was 3.20 and the total was 18.20

rjkz [21]

Answer:

The price of one hotdog is $2.50

Step-by-step explanation:

You can first write this out as an equation to make it easier to solve.

Lets say that x= the price of a hot dog and y= the price of popcorn

The equation would be:

6x + y = 18.20

We know that y= 3.20 so we can subtract 3.20 from 18.20. That will leave us with 6x = 15

Then, we just have to divide both sides by 6 and our answer comes out as x = 2.50

(this is one of my first answers so apologies for any mistakes)

6 0

4 years ago

corey has 42 feet of fencing around his garden. The garden is rectangular in shape, and its length is equal to twice the width m

Elza [17]

W= width
l= length

2w+2l=42
l=2w-3

w= 8
l= 13

4 0

3 years ago

Which shows the correct substitution of the values a, b, and c from the equation –2 = –x + x² – 4 into the quadratic formula?

Romashka [77]

-2 = - x + x^2 -4 => x^2 - x - 4 + 2 = 0

x^2 - x - 2 = 0

a is the coefficient of x^2 => a = 1

b is the coefficient of x => b = - 1

c is the constant term => c = - 2

quadratic equation: [- b +/- √(b^2 - 4ac) ] / 2a =

= { 1 +/- √[ (-1)^2 - 4(1)(-2)] } / (2(1) = { 1 +/- √ (1 + 8) } / 2 = {1 +/- √9} / 2 =

= { 1 +/- 3} / 2

4 0

3 years ago

One number is 1/2 of another number. The sum of the two numbers is 3. Find the two numbers.

Pepsi [2]

Answer:

The answer is 2 and 1

Step-by-step explanation:

1+2=3 and 1 is half of 2

8 0

3 years ago

Read 2 more answers

You are playing a new video game. The table shows the proportional relationship between the number of levels completed and the t

Lana71 [14]

The time to complete 2 levels is (c) 60 minutes

<h3>How to determine the time to complete 2 levels?</h3>

The table of values is given as

Number of Levels Time (hours)

2 ?

3 1.5

Express the blank (?) with y

Number of Levels Time (hours)

2 y

3 1.5

The ordered pairs from the table are

(x, y) = (2, y) and (3, 15)

The table shows the proportional relationship

This means that the equation can be represented as

y = Y/X * x

Where

(x, y) = (2, y)

(X, Y) = (3, 1.5)

So, we have

y = 1.5/3 * 2

Evaluate the quotient

y = 0.5 * 2

This gives

y = 1 hour

Convert to minutes

y = 60 minutes

Hence, the time is 60 minutes