3 years ago

A watch costs $30. The equation y=30x describes the cost y of x number of watches. Identify the graph of this

Mathematics

1 answer:

kupik [55]3 years ago

8 0

Answer:

Step-by-step explanation:

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(3a+2.5b)^2=9a^2+6.25b^2+*<br> Please help before Thursday

Anon25 [30]

Step-by-step explanation:

We have (x + y)² = (x + y)(x + y) = x² + 2xy + y².

Let x be 3a and y be 2.5b.

Therefore (3a + 2.5b)²

= (3a)² + 2(3a)(2.5b) + (2.5b)²

= 9a² + 15ab + 6.25b².

Hence the '*' sign should be replaced with 15ab.

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3 years ago

Joaquin is ordering 5 identical sandwiches and a bag of chips. The bag of chips cost $1.25 and the entire order costs $38.75. Wr

GenaCL600 [577]

Answer:

A sandwich costs $7.5

Step-by-step explanation:

Given

Represent chips with c and sandwiches with c

$c = \$1.25$

$Total = \$38.75$

From the question, we understand that 5 sandwiches were ordered.

Hence, the question of the system is:

$5s + c = Total$

Substitute values for Total and c

$5s + 1.25 = 38.75$

Collect Like Terms

$5s = 38.75 - 1.25$

$5s = 37.5$

Divide both sides by 5

$s = \frac{37.5}{5}$

$s = 7.5$

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3 years ago

Sin 30Degrees = square of 3/2 and cos 30degrees =1/2 true or false

zhenek [66]

Answer:

False

Step-by-step explanation:

Trying it in a calculator says otherwise meaning it's false

4 0

3 years ago

Hello, can you please help me!!!!!!!!

pochemuha

Answer:

i have no clue

Step-by-step explanation:

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3 years ago

Thanks to some people who helped but I got a d from some of you guys.

denpristay [2]

oh no

Step-by-step explanation:

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3 years ago

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