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4 years ago

PLEASE HELP ME!! Thank you

Mathematics

1 answer:

JulijaS [17]4 years ago

4 0

Hello!

your three answers are:

the maximum height of the rock occurs at x=0 because the y intercept always is at x=0, and the starting point is the y intercept

the rock is in the air for 3 seconds because x goes to a max of 3

the maximum height of the rock is 45 feet because y, or height, starts at 45, and ends at 0

I hope this helps, and have a nice day!

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Add _____ to each side x2 – 8x = 9 to complete the square.

zhuklara [117]

Answer:

The correct answer is 25

Step-by-step explanation:

It is given a quadratic equation,

x² – 8x = 9

<u>To find the number to be added</u>

The given equation be x² – 8x = 9

here we have to add (b/2)² - the square of half the coefficient of x,

Here b = -8

(b/2)² = (-8/2)² = -4² = 16

Add both side with 16

x² – 8x + 16 = 9 + 16

(x - 4)² = 25

(x - 4)² = 5²

3 0

3 years ago

Read 2 more answers

Sandra's printer can print 5 pages in 2/3 of a minute (40s). Show different ways to determine how many pages her printer can pri

Ne4ueva [31]

Answer:

$7\frac{1}{2}$ pages

Step-by-step explanation:

Method 1: Working with minutes

Let us assume that, Sandra's printer can print x pages in 1 minute.

Then we can write the equation:

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

We can rewrite the ratios as a fraction.

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

This simplifies to

$x=\frac{15}{2}$

$x=7\frac{1}{2}$

Method 2: Working with seconds

If 5 pages corresponds to 40 seconds, then we can write: $5:40$

Let y corresponds to 60 seconds (1 minutes).

Then:

$y:60=5:40$

We rewrite as fraction:

$\frac{y}{60}=\frac{5}{40}$

Multiply both sides by:

$y=\frac{5}{40}\times 60$

$y=\frac{300}{40}$

$y=\frac{15}{2}$

$y=7\frac{1}{2}$

6 0

3 years ago

Tasha plants to tile the floor in her room with square tiles that are 1/4 foot long. will she use more or fewer tiles if she onl

WITCHER [35]

1/4 foot = 3 inches.
The area of a 1/4-ft square is (3" x 3") = 9 square inches.

1/3 foot = 4 inches.
The area of a 1/3-ft square is (4" x 4") = 16 square inches.

The 1/3-ft square tile covers more area than a 1/4-ft square tile
covers. So she won't need as many 1/3-ft tiles to cover the floor
in her room. She will use fewer of those.

6 0

3 years ago

The volume of a cylinder is 725x cm”. The radius of the base of the cylinder is 5 cm. What is the height of the cylinder?

hichkok12 [17]

Determine the volume formula for the cylinder. Plug in your given volume and radius to solve for h (height). See image above