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Goshia [24]
3 years ago
9

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

.79, 9 sleeves for 22.99​
Mathematics
1 answer:
PIT_PIT [208]3 years ago
6 0

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.

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Cos²x - 2 sin²x = -2 .Help me to solve it ​
Alex777 [14]

Step-by-step explanation:

note that

sin²x = (1-cos²x)

LHS= cos²x - 2 sin²x

= cos²x - 2(1-cos²x)

= cos²x - 2 + 2cos²x

= 3cos²x - 2

or

cos²x = (1-sin²x)

LHS= cos²x - 2 sin²x

=1-sin²x - 2 sin²x

= 1-3sin²x

7 0
4 years ago
Find the distance between (1, 4) and (-2, 0)
Vanyuwa [196]

Answer:

\boxed {d = 5}

Step-by-step explanation:

Use the <u>Distance Formula</u> to help you determine the distance between two given points:

d = \sqrt{(x_{2} - x_{1})^{2} + (y_{2} - y_{1})^{2}}

First point: (x_{1}, y_{1})

Second Point: (x_{2}, y_{2})

-Apply the two given points onto the formula:

First point: (1, 4)

Second point: (-2, 0)

d = \sqrt{(-2 - 1)^{2} + (0 - 4)^{2}}

-Solve for the distance:

d = \sqrt{(-2 - 1)^{2} + (0 - 4)^{2}}

d = \sqrt{(-3)^{2} + (-4)^{2}}

d = \sqrt{9 + 16}

d = \sqrt{25}

\boxed {d = 5}

Therefore, the distance is 5.

4 0
3 years ago
The length of the side of a square is 2x + 3y. Find the area of the square in terms of x and y
Angelina_Jolie [31]

Answer:

it stays the same because there is no simplifying it and the re are no like terms

6 0
3 years ago
In Zachs class 3/5 of the 25 students are boys. How many boys are in Zachs class?
LUCKY_DIMON [66]

Answer:

15

Step-by-step explanation:

(3/5)*25=15

4 0
3 years ago
How to do this? please help
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