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Arte-miy333 [17]
2 years ago
10

Must write and solve using a system of linear equation.

Mathematics
1 answer:
GaryK [48]2 years ago
3 0

Answer:

Science problems= 12

Math problems= 27

Step-by-step explanation:

If

x= math problems for solving

y= science problems for solving

x+y=39

y=x-15

Using substitution method:

x+(x-15)=39

2x-15=39

2x=39+15

x=(39+15)/2

x=27

Having "x" lets find out "y" value.

x+y=39

27+y=39

y=39-27

y=12

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A town has a population of 18,000 and grows at 2% every year. What will be the population after 12 years, to the nearest whole n
S_A_V [24]

Answer:

22,828

Step-by-step explanation:

A=18000(1+0.02)^12

3 0
2 years ago
For two events, M and N, P(M)=0.7, P(N|M)=0.3, and P(M'|N')
dexar [7]
Topic:C<span>onditional Probability

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5 0
2 years ago
Solve the system of equations:
iVinArrow [24]

(-1,-2) \:  \:  \:  \:  \: and \:  \:  \:  \:  \: (3,6) \\ Answer: A

Step-by-step explanation:

y = 2x \\ y =  {x}^{2}  - 3 \\  \\ 2x =  {x}^{2}  - 3 \\  {x}^{2}  - 2x - 3 = 0 \\ (x + 1)(x - 3) = 0 \\ x + 1 = 0 \:  \:  \:  \:  \: or \:  \:  \:  \:  \: x - 3 = 0 \\ x =  - 1 \:  \:  \:  \:  \: or \:  \:  \:  \:  \: x = 3

When x = -1

Substitute x = -1 into y = 2x

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( -1, -2)

When x = 3

Substitute x = 3 into y = 2x

y = 2(3)

y = 6

( 3, 6)

5 0
3 years ago
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