admin

2 months ago

Guest #2391574

2 months ago

**Answer:**

3.99

**Step-by-step explanation:**

18.90-2.95= 15.95

15.96/4=3.9875

Question

Mr.King used 16 gallons of gas in 5 days. Circle any of the following that describe the average amount of gas king used per day.
( helpful if showed work, thanks for whoever helped!!)

Solution 1

**Answer:**

3.2 gallons

**Step-by-step explanation:**

16 gallons / 5 days

Question

What is -4 4/25 as a decimal

Solution 1

**Answer: -0.64**

**Step-by-step explanation:**

Put it in the calculator as (-4)(4/25) and you get the answer

Solution 2

**Answer:**

-4.16

**Step-by-step explanation:**

multiply 4 by 4 because it would be 4/25, and you wnat to make 100 the denominator

Question

How do I solve for x if my equation is y = x - 3

Solution 1

Steps to solve:

y = x - 3

~Subtract x to both sides

y - x = x - x + (-3)

~Simplify

y - x = -3

~Subtract y to both sides

y - y - x = -3 - y

~Simplify

-x = -3 - y

~Divide x by -1 to both sides

-x/-1 = -3/-1 + (-y/-1)

~Simplify

**x = 3 + y** or **x = y + 3**

Best of Luck!

Solution 2

**Answer:**

**Step-by-step explanation:**

Question

Factor the expression 2x^3-3x^2-5x

Solution 1

**Answer:**

x(2x-5)(x+1)

**Step-by-step explanation:**

1. First factor out the x of all the numbers to get x( 2x^2 -3x -5)

2. To factor, I used cross multiplying- (Sorry but I don't know how to explain it)

3. You're done!

(Sorry if it isn't amazing)

Question

20 pounds of $4 written as a unit rate

Solution 1

**Answer:**

20 pounds divided by $4= 5

**Step-by-step explanation:**

Question

An item costs $330 before tax, and the sales tax is $19.80 Find the sales tax rate. Write your answer as a percentage

Solution 1

**Answer:**

5. 66%

**Step-by-step explanation:**

Sales tax = $19.80

Cost of item before sales tax = $330

Cost of item after sales tax = 19.80+19.80 + 19.80+330

= $349.80

Sales tax rate

19.80349.80×100%5.66%\begin{lgathered}\frac{19.80}{349.80} \times 100\% \\ 5.66\%\end{lgathered}

349.80

19.80

×100%

5.66%

So rate of sales tax is 5.66%

Question

Here are the heights (in inches) of 8 students in a seminar. 72, 65, 72, 61, 70, 66, 62, 68
What is the percentage of these students who are shorter than 71 inches?

Solution 1

The **percentage **of the **students **who are shorter than **71 inches** in these groups is 75%.

A **percentage **is a way to describe a part of a whole. such as the **fraction **¼ can be described as 0.25 which is equal to** 25%.**

To convert a fraction to a percentage, convert the **fraction **to decimal form and then multiply by 100 with the '%' symbol.

The number of **students **that are shorter than 71 inches is 6, while the **total **number of students is 8. Therefore, the **percentage **of these students who are shorter than 71 inches is,

Percentage = 6 /8 × 100%

= 0.75 × 100%

= 75%

Learn more about** Percentages:**

#SPJ2

Solution 2

**Answer:**

75% of the students are shorter than 71 inches

**Step-by-step explanation:**

Question

How is 0.808 minus 1?

Solution 1

**Answer:**

Not sure what you are talking about, but i think the answer is -0.192

**Step-by-step explanation:**

Solution 2

**Answer:**

-0.192

**Step-by-step explanation:**

0.808-1=-0.192

Question

Part 1 out of 2 Write an expression for 6 times the square of a car's speed plus 6 times the car's speed
minus 120. Use v for the car's speed. Do not factor the expression.
The expression is
Next

Solution 1

**Answer:**

**The expression is 6v² + 6v - 120**

**Step-by-step explanation:**

v = Car's speed

**Let's write the expression for 6 times the square of a car's speed plus 6 times the car's speed minus 120, this way:**

6v² = ** **6 times the square of a car's speed

6v - 120 = 6 times the car's speed minus 120

Now, let's add the operator (+):

6v² (6 times the square of a car's speed) + 6v - 120 (6 times the car's speed minus 120)

**The expression is 6v² + 6v - 120**

Question

The sides of a rectangle are in the ratio 2:5. The perimeter of the rectangle is 70 cm. What is the width of the rectangle?

Solution 1

**Width = 10cm**

**Length = 25cm**

**Explanation: **

Given, width:length = 2:5

Let width = 2x ,

So, length = 5x

Perimeter of rectangle = 2x(length + width)

According to the question,

Hence,

**Width = 10cm**

**Length = 25cm**

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