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Lapatulllka [165]
4 years ago
7

Kendra’s work is shown in the table. Where, if anywhere, did Kendra first make a mistake? Steps Kendra’s Work Step 1 Negative 3

x + 7 y = negative 15. Negative 2 x minus 7 y = 5. Negative 5 x = negative 10. Step 2 Negative 5 x = negative 10. x = 2. Step 3 Negative 3 (2) + 7 y = negative 15. Negative 6 + 7 y = negative 15. 7 y = negative 9. y = Negative StartFraction 9 Over 7 EndFraction = negative 1 and StartFraction 2 Over 7 EndFraction
Mathematics
2 answers:
Cerrena [4.2K]4 years ago
5 0

Answer:

D- NO MISTAKE

Step-by-step explanation:

KENDRA MADE NO MISTAKE

natali 33 [55]4 years ago
4 0

Answer:

C : STEP 3

Step-by-step explanation:

JUST DID THIS EQUATION AND GOT IT RIGHT HOPE THIS HELPS

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4 years ago
The 8th grade is selling tickets to the 8th grade formal.The cost per ticket is $15.The decorations and food cost $600,and each
MArishka [77]

Answer:

Step-by-step explanation:

Each ticket is $15.  The number of tickets is what we are trying to solve for.  The class spends a certain amount of money to prepare for the formal.  They hope that the money they make in ticket sales is MORE than what they spend.  The expression that represents the number of tickets at $15 each is 15x, where x is the number of tickets.  They hope that the sales are greater than what they spend, so what we have so far is

15x >

Greater than what, though?  What do they spend?  They spend 600 for the food, so

15x > 600...

but they also have to print a certain, unknown number of tickets at .50 each.  The expression that represents the printing of each ticket is .5x (we can drop the 0; it doesn't change the answer or make it wrong if we drop it off).  So the cost for this affair is the food + the printing.

15x > 600 + .5x

Solve this inequality for x.  Begin by subtracting .5 from both sides to get

14.5x > 600 so

x > 41.3

Because we are not selling (or printing) .3 of a ticket, it's safe to say (and also correct!) that they need to sell (and print) 41 tickets.  If they sell 41 tickets, the profit is found by

15(41) > 600 + .5(41)

615 > 600

This means that at 41 tickets, they make a profit.  At 40 tickets, the inequality looks like this:

15(40) > 600 + .5(40) and

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8 0
4 years ago
Please help.. nobody will help me and I’ve been asking this question so many times but nobody will answer..
lisov135 [29]

Answer:

The floor covers 81yd^{2}

Step-by-step explanation:

This question is actually easier than you think, but I am here to help.

First off you know the room is a square. All squares have equal sides no matter what, that is the number 1 basic rule. (27ft by 27ft)

1. Find the area of the square: To find area you multiply Length by Width. Since you are multiplying two units you will get a squared value. The square measures 27 ft by 27 ft on both sides.

Lets multiply those two numbers:

(27 * 27) = 729ft^{2}

We need to stay in the same unit because you are multiplying two values of the same unit. The total square feet of the room is 729ft^{2}

2. Next, all you need to do is convert ft^{2} to yd^{2}

Like you mentioned: (1 yd^{2}  = 9ft^{2})

Now lets create a proportion between the two unit:

\frac{729ft^{2} }{1} * \frac{1yd^{2} }{9ft^{2} }

The ft^{2} unit cross cancels and your left with yd^{2}.

Now all you do is multiply straight across and you get \frac{729yd^{2} }{9}  = 81 yd^{2}

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4 years ago
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