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castortr0y [4]
2 years ago
8

Are the two expressions below equivalent. SHOW and EXPLAIN all your

Mathematics
1 answer:
valina [46]2 years ago
8 0

Answer:

No they're not equivalent

Step-by-step explanation:

5(x - 9) + 2x -1 -5(9 - x) - 2x

5x - 45 + 2x - 1 5x - 45 - 2x

7x + 46 does not equal 3x - 45

Explaining isnt my specialty, sorry

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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

<u><em>Explanation</em></u>

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


6 0
3 years ago
How do you get the answer88-43.7
koban [17]
Since 88 has no decimal, you would but a zero behind it and then subtract. You have to borrow from the 8 (make it a 7) and make zero 10. Then subtract. 10-7=3, 7-3=4, 8-4=4. Your answer will be 44.3
6 0
3 years ago
PLZ HELP PLZ PLZ PLZ HELP
faust18 [17]

Answer:the diameter is 7

Step-by-step explanation: 21.98 divide by pi is 7 so diameter is 7

5 0
2 years ago
Stephanie bought 36.5 inches of lumber at Home Depot the lumber cost 2.10 per inch including the sales tax. Stephanie bought 36.
tamaranim1 [39]

Answer:76.65

Step-by-step explanation:

First, you write 36.5 times 2.10

Then, multiply them.

That equals 76.65

4 0
3 years ago
A ship sails on a bearing of 110° for 12 km.
Lera25 [3.4K]

Answer:

10.439 Km

Step-by-step explanation:

5 0
2 years ago
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