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Aleksandr-060686 [28]
4 years ago
6

"jose is r years old. keith is 3 times as old as he is. lara is 4 years younger than keith." find keith's age in terms of r

Mathematics
1 answer:
andrew-mc [135]4 years ago
5 0
Keith 's age is now 3r
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After being rearranged and simplified, which of the following equations could be solved using the quadratic formula?
dmitriy555 [2]
A. 2x^2 - 3x + 10 = 2x + 21
2x^2 - 3x - 2x + 10 - 21 = 0
2x^2 - 5x - 11 = 0                              (quadratic equation)

2x^2 - 6x - 7 = 2x^2
2x^2 - 2x^2 - 6x - 7 = 0
-6x - 7 = 0                                          (not a quadratic equation)

5x^2 + 2x - 4 = 2x^2
5x^2 - 2x^2 + 2x - 4 = 0
3x^2 + 2x - 4                                      (quadratic equation)

5x^3 - 3x + 10 = 2x^2
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Therefore, options a and c can be solved using the quadratic formula.
3 0
3 years ago
The solution to an equation is 21
elena-14-01-66 [18.8K]
An solution to an equation = 21 would be something like 2p + 7

if you wanna know how to solve this 
here is how:
<span>Simplifying 2p + 7 = 21 Reorder the terms: 7 + 2p = 21 Solving 7 + 2p = 21 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 2p = 21 + -7 Combine like terms: 7 + -7 = 0 0 + 2p = 21 + -7 2p = 21 + -7 Combine like terms: 21 + -7 = 14 2p = 14 Divide each side by '2'. p = 7 Simplifying p = 7</span>
5 0
3 years ago
Given the function g(x)=√x+4, which of the following values cannot be the domain of g?
Gennadij [26K]

Answer:

  D.  x = -5

Step-by-step explanation:

The square root function is only defined for non-negative arguments. For the function ...

  g(x)=\sqrt{x+4}

this means we must have ...

  x +4 ≥ 0

  x ≥ -4 . . . . . . subtract 4 from both sides

All of the numbers on your answer choice list are more than -4 except -5.

  x = -5 is not in the domain of g(x)

6 0
2 years ago
Niall owes $187 to his cousin. However, he doesn't have any money right now. He hopes to earn some money by painting a house. He
Alla [95]
The equation would be 34 x 2x-187= y. 
8 0
3 years ago
Read 2 more answers
The student council sold 300 tickets for a basketball game. An adult ticket costs $3.00 and a student ticket costs $1.00. Ticket
slamgirl [31]

97 Adult tickets were sold,

97x3=291

300-97=203 student tickets

$291+$203=$494

4 0
2 years ago
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