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3 years ago

Please help 20points

Mathematics

2 answers:

mafiozo [28]3 years ago

4 0

Answer: the first one is 720. The second one is 72

Step-by-step explanation:

Sindrei [870]3 years ago

4 0

80% of 900 is 720

18 is 25% of 72

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How many solutions does the following equation have? 7(y+3)=5y+8

Sedaia [141]

Answer:

Alright well solve for y by simplifying both sides of the equation then isolating the variable

Exact form: y = - 13/2

Decimal form: y = - 6.5 Hope this helps have a nice day :)

Step-by-step explanation:

6 0

3 years ago

20 point help.brainliest will be mark

Anon25 [30]

The first one is correct except add d

7 0

3 years ago

Read 2 more answers

12x - 16 = 68 Solve for x

cricket20 [7]

Answer:

x = 7

Step-by-step explanation:

12x - 16 = 68

Add 16 to each side

12x - 16+16 = 68+16

12x =84

Divide by 12

12x/12 = 84/12

x = 7

6 0

3 years ago

Read 2 more answers

Also they have positive 1.25

aleksley [76]

-1.25............................

6 0

3 years ago

At the movie theatre, child admission is $6.30 and adult admission is $9.90 . On Monday, 159 tickets were sold for a total sales

frez [133]

C = child tickets
a = adult tickets

Solve this with the substitution method.
Make two equations:

6.30c + 9.90a = 1,246.50
c + a = 159

Solve for c.
Subtract 9.90a from both sides.

6.30c = 1,246.50 - 9.90a
Divide both sides by 6.30.

c = 197.86 - 1.57a (rounded to hundredths)
Plug c into second equation.

197.86 - 1.57a + a = 159
Combine like terms.

197.86 - 0.57a = 159
Subtract 197.86 from both sides.

-0.57a = -38.86
Divide both sides by -0.57.

a = 68.18
round up to ones: 68

 $\boxed {68~adult~tickets}$ were sold.

8 0

3 years ago