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4 years ago

What is an algebraic expression for the word phrase? the difference of a number r and 3

Mathematics

1 answer:

Ostrovityanka [42]4 years ago

8 0

Answer:

r - 3

Step-by-step explanation:

The word "difference" means that it's a subtraction problem

so the difference between r and 3 is r - 3

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What is the value of the function f(x) = 2x – 5 when x = 22? A17 B49 C105 D39

enyata [817]

f(x) = 2x – 5

f(22) = 2(22) – 5 = 44 -5 = 39

answer

D39

8 0

3 years ago

What is 1-blank=0.015??? Plzzz help me :)

VLD [36.1K]

Answer:

blank = 0.985

Step-by-step explanation:

Let's say blank = x.

1 - x = 0.015

x = 1 - 0.015

x = 0.985

Therefore, blank = 0.985.

8 0

3 years ago

Does anyone know the answer i need help?

vodomira [7]

The answer correct answer is b

4 0

3 years ago

I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER

Step2247 [10]

Answer:

$A = 297\pi$

Step-by-step explanation:

To solve this problem we need to be familiar with the formula for the surface area of a cone:

$A = \pi r(r + \sqrt{h^2+r^2})$

We are given the length of a side and the diameter, to calculate the radius divide the diameter in half:

$r = \frac{d}{2}\\r = \frac{18}{2}\\r = 9 cm$

To calculate the height of the cone, we must use the Pythagorean Theorem:

$C^2 = A^2 + B^2$

We can treat the side length as the hypotenuse $C$ , the radius as the base $A$ , and solve for height $B$ . Set the expression up like this:

$C^2 = A^2 + B^2\\24^2 = 9^2 + B^2\\B^2 = 24^2 - 9^2\\B = \sqrt{24^2 - 9^2}\\B = \sqrt{576 - 81}\\B = \sqrt{495}\\B \approx 22.25$

Now we can plug into our original formula:

$A = \pi r(r + \sqrt{h^2+r^2})\\A = \pi 9(9+\sqrt{\sqrt{495}^2+9^2}\\A = \pi 9(9+\sqrt{495 + 81}\\A = \pi 9(9+\sqrt{576})\\A = \pi 9(9 + 24)\\A = \pi 9(33)\\A = 297\pi$

5 0

2 years ago

a sports store sells three different packs of tennis balls. which pack is the best to buy? 4 sleeves for 11.49, 6 sleeves for 16

PIT_PIT [208]

Answer:

9 sleeves for 22.99

Step-by-step explanation

The first pack has a unit rate of $11.49/ 4 balls

=$2.8725

The second pack has a unit rate of $16.79/6balls

=$2.798 per ball

the third pack has a unit rate of $22.99/9balls

=2.554

So, I would definitely go for the third pack since it has the least cost.

6 0

3 years ago