2 years ago

Whats the range of y=2x-7

Mathematics

2 answers:

Andrei [34K]2 years ago

6 0

Answer:

(-∞,∞) or {y|y∈R}

Step-by-step explanation:

Digiron [165]2 years ago

6 0

Y= -5x that’s what I think

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Garrett and Carter went to the movies last weekend. Together they bought 2 drinks and 2 popcorns. They spent a total of $12.50.

-BARSIC- [3]

The cost of one drink is $2.50 and cost of one popcorn is $3.75

Explanation

Suppose, the cost of one drink is $x$ dollar and cost of one popcorn is $y$ dollar.

Given that, total cost for 2 drinks and 2 popcorns is $12.50 and total cost for 6 drinks and 5 popcorns is $33.75

So, the system of equations will be......

$2x+2y=12.50 ..................................... (1)\\ \\ 6x+5y= 33.75 ..................................... (2)$

Multiplying equation (1) by -3 , we will get.....

$-3(2x+2y)=-3(12.50)\\ \\ -6x-6y=-37.50 ..................................... (3)$

Now, adding equation (2) and equation (3) , we will get ............

$5y-6y=33.75-37.50\\ \\ -y=-3.75\\ \\ y=3.75$

Plugging this $y=3.75$ into equation (1) ......

$2x+2(3.75)=12.50\\ \\ 2x+7.50=12.50\\ \\ 2x=12.50-7.50=5\\ \\ x=\frac{5}{2}=2.50$

So, the cost of one drink is $2.50 and cost of one popcorn is $3.75

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3 years ago

Friday’s high temperature was −1°C. The low temperature was −5°C. What was the difference between the high and low temperatures?

Digiron [165]

Answer:

-4C

Step-by-step explanation:

-1 (-4) = -5

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3 years ago

There are 450 students at a school. If each classroom holds 30 students , how many classrooms are needed at school?

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15 classrooms

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Help pls!!!! I need this asap pls be right

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Name two different numbers that round to 30 when rounded to the nearest ten

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29 and 31
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