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Klio2033 [76]
3 years ago
7

I forgot how to solve equations such as 3x+5y=-5. Can you give me examples?

Mathematics
2 answers:
maria [59]3 years ago
7 0
Well 3x is 3 times if they are together beside each other that mean they are multiplying so 3 times x plus 5times y = -5
quester [9]3 years ago
5 0
You want to solve for x.

3x+5y=-5
3x=-5-5y
x=-5/3 - 5/3y

Harder than it looks.
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A store purchased a DVD for 12.00 and sold it to a costumer for 50 percent more than the purchase price. The costumer was charge
likoan [24]

Answer:

19.26

Step-by-step explanation:

price sold for= 12×150%

= 18

total cost = 18 × 107%

= 19.26

6 0
2 years ago
What is the absolute deviation of 4 in this data set?
Nana76 [90]

Answer:

n

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Mean

11

Average Absolute Deviation (MAD)

4.6667

Step-by-step explanation:

4 0
2 years ago
What is the formula of a²-b²?​
Thepotemich [5.8K]

Answer:

The formula of a²-b² are as follows:

Step-by-step explanation:

(a-b)(a+b)

5 0
3 years ago
Read 2 more answers
A carnival charges two different prices for admissions. Adults cost $4 while children cost $1.50. If a total of $5050 was collec
GenaCL600 [577]

Answer:

Step-by-step explanation:

We have to have 2 different equations to solve this.  One equation will represent the number of tickets sold while the other represents the money collected when the tickets were sold.

We know that adult tickets + children tickets = 2200 tickets.

That's the "number of tickets" equation.  Let's call adult tickets "a" and children's tickets "c".  So a + c = 2200

Now if each adult costs $4, then the expression that represents that as a cost is 4a.  If there is 1 adult, the cost is $4(1) = $4; if there are 2 adults, the cost is $4(2) = $8; if there are 3 adults, the cost is $4(3) = $12, etc.

The same goes for the children's tickets.  If each child's ticket is $1.50, then the expression that represents the cost of a child's ticket is 1.5c (we don't need the 0 at the end; it doesn't change anything to drop it off).  The total money brought in from the cost of these tickets was $5050, so

4a + 1.5c = 5050

Let's solve the first equation for a.  If a + c = 2200, then a = 2200 - c.  Sub that into the second equation and solve it for c:

4(2200 - c) + 1.5c = 5050 and

8800 - 4c + 1.5c = 5050 and

-2.5c = -3750 so

c = 1500

That means that there were 1500 children's tickets sold.  If a + c = 2200, then a + 1500 = 2200 so

a = 2200 - 1500 so

a = 700

There were 1500 children's tickets sold and 700 adult tickets sold.

7 0
3 years ago
Which are solutions of the equation 4x2 – 7x = 3x + 24? Check all that apply.
SCORPION-xisa [38]

Answer:

{-3/2, 4}

Step-by-step explanation:

Use synthetic division here.  If the remainder is 0, then the divisor is a root or solution.

Here we have x = -4.  Perform the synthetic division as follows:

-4       4     -10    -24

                 -16     108

------------------------------

          4      -26     84              The remainder is 84, which tells us -4 is NOT

                                                a root/solution.

Try -3/2 as divisor this time:

-3/2    4     -10    -24

                   -6    24

------------------------------

          4      -16       0            Remainder is 0, so -3/2 is a solution

Show in the same manner that 4 is a solution also.  Or determine whether x - 4 satisfies 4x - 16 = 0 (it does).

8 0
3 years ago
Read 2 more answers
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