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AlekseyPX
3 years ago
8

Evaluate the expression

Mathematics
1 answer:
Softa [21]3 years ago
3 0

Answer:

900

Step-by-step explanation:

You would substitute n for 3 so it would be 60x3=180 then multiply that by 2 = 360. Then take the 180 and multiply that by -3 to get -540. Finally do 360 - (-540) into a calculator to get 900.

Hope this helps

Please mark me as Brainliest

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Please help thank you!
Arte-miy333 [17]

Answer:

  • golf: $10
  • batting: $2.50

Step-by-step explanation:

We can write two equations in the two unknowns using the given relations. Let g and b represent the costs of a round of golf and a turn in the batting cage, respectively.

  5g +4b = 60 . . . . . Sylvester's expense

  3g +6b = 45 . . . . . Lin's expense

Dividing the second equation by 3 gives ...

  g +2b = 15   ⇒   2b = 15 -g

Substituting into the first equation, we have ...

  5g +2(2b) = 60

  5g +2(15 -g) = 60 . . . . . substitute for 2b

  3g = 30 . . . . . . . . . subtract 30, collect terms

  g = 10 . . . . . . . divide by 3

__

  2b = 15 -10 = 5 . . . . use the value of g to find b

  b = 2.5 . . . . . . . . divide by 2

Mini golf costs $10 per round; batting cages cost $2.50 per turn.

7 0
2 years ago
Does this represent quntitites that are proportional
Yuki888 [10]

Answer:

B

Step-by-step explanation:

Not all of the pairs represent the same ratio

6 0
2 years ago
Find the zeros of the function by rewriting the function in intercept form
galben [10]
y=3x^2+2x\\
y=x(3x+2)\\
y=x(x+\frac{2}{3})\\
x=0 \vee x=-\frac{2}{3}\\\\
f(x)=5x^2-25x+30\\
f(x)=5(x^2-5x+6)\\
f(x)=5(x^2-2x-3x+6)\\
f(x)=5(x(x-2)-3(x-2))\\
f(x)=5(x-3)(x-2)\\
x=3 \vee x=2


5 0
3 years ago
PLEASE HELP ASAP!!!!! MAKING BRAINLIEST
KonstantinChe [14]

Answer:

1500mi^2

Step-by-step explanation:

500 x 300 = 1500

that is the area of the grid in miles

4 0
3 years ago
Read 2 more answers
Given the function LaTeX: f\left(x\right)=-5x^2-x+20f ( x ) = − 5 x 2 − x + 20, find LaTeX: f\left(2\right)f ( 2 ). Group of ans
BartSMP [9]

The value of f(2) is -2 ⇒ 1st answer

Step-by-step explanation:

The form of the quadratic function is;

f(x) = ax² + bx + c, where

  • a is the coefficient of x²
  • b is the coefficient of x
  • c is the numerical term
  • x is the domain of the function and f(x) is the range of the function

∵ f(x) = -5x² - x + 20

- f(2) means value f(x) at x = 2

∵ x = 2

- Substitute x in the function by 2 to find f(2)

∵ f(2) = -5(2)² - (2) + 20

∴ f(2) = -5(4) - 2 + 20

∴ f(2) = -20 - 2 + 20

∴ f(2) = -2

The value of f(2) is -2

Learn more:

You can learn more about the function in brainly.com/question/12363217

#LearnwithBrainly

6 0
3 years ago
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