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drek231 [11]
3 years ago
9

at the city Museum, child admission is $5.10 an adult mission is $8.70. On Friday, 136 tickets were sold for total sales of $970

.80. How many adult tickets were sold that day
Mathematics
1 answer:
wariber [46]3 years ago
7 0

Answer:

x = 76 children's tickets sold

Step-by-step explanation:

Let x = the number of children's tickets sold

Let y = the number of adult tickets sold

x + y = 131

5.5x + 9.8y = 957    Solve the first equation for y

y = 131 - x        Multiply the second equation by 10

55x +98y = 9570     Substitute the above equation into this one.

55x + 98(131-x) = 9570   Use the distributive property

55x + 12838 - 98x = 9570   Solve the equation

-43x = -3268

x= 76 children's tickets sold

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I do not understand this! please help!
Bad White [126]

Answer:

So this is an algebra question, yes?

So an equation of a line follows this format: y=mx+b.

(m is your slope. b is the y-int)

In order to get to that equation, you use the formula: y-y¹=m(x-x¹).

(this is your point-slope formula)

If you are given two points, they want you to use this formula to find the slope:

y²-y¹ all divided by x²-x¹. (Fraction form).

so, label the points.

(0,6) 0 will be x¹. 6 will be y¹.

(3,0) 3 will be x².. 0 will be y².

(0-6) all over (3-0).

you get -6 over 3. You can simplify that to -2.

-2 is your slope.

so plug that into the second formula along with either one of the points given to you. I am going to choose (0,6) randomly.

y-6=-2(x-0)

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y-6=-2x. [-2×0 is 0 so dont include it]

y=-2x+6 [bring the -6 over by adding it]

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Normally, they will ask you for the slope-intercept form.

Hope this helps.

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