Answer:
x equals -7 and x equals 5 our function is discontinuous
Step-by-step explanation:
x^2+7x-5x-35=0
x(x+7)-5(x+7)=0
(x+7)(x-5)=0
(x+7)=0\text{ or }(x-5)=0
x=-7\text{ or }x=5
Answer: Marie is 34 and Joanna is 21.
To find this you first subtract 13 from 55. This will give you 42, which you then divide by 2 to find Joanna's age. Finally you simply add 13 to Joanna's age to find Marie's age (34). To check this, add 34 and 21 together, which gives you 55.
I hope this helps!
Steve:y = 250-25x
Chelsea: y = 30 + 30x
Solution: x = 4 and y = 150
Answer:
3x -2y = -5
Step-by-step explanation:
Standard form is ...
ax +by = c
where the leading coefficient (a, or b if a=0) is positive and a, b, c are mutually prime.
Multiplying the equation by 2 gives ...
2y = 3x +5
We can subtract 2y+5 to get standard form:
3x -2y = -5
Answer: You'll have 10 nickels and 18 dimes.
Step-by-step explanation:
Its a guessing question.
10 nickles = .50
18 dimes = $1.80
$1.80 + .50= 2.30