x=5y-1
x+2y=13
Answer: x = 9, y = 2
Step-by-step explanation:
plug in values and solve.
Answer:
10p coins does he have 102
Step-by-step explanation:
given data
saves= 10p coins and 20p coins
total = 17 pounds
to find out
how 10p coins does he have
solution
we consider here no of 20p coin = x
so equation will be here
3 × 10 x +20 x = 1700
30 x + 20 x = 1700
x = 34
so that
10p coins = 3 time × 34 = 102
20p coins = 34
so that 10p coins does he have 102
Answer:
I'm not sure how euros work but I'm almost certain there are 18 20p coins
Step-by-step explanation:
Answer:
The original price of the gift was $40.
Step-by-step explanation:
Let the original price of the gift be = x
Discount of 10% on the gift and each sister paid $9 means a total of dollars
We can write this information mathematically like :
Solving for x now;
x = $40
So, the original price of the gift was $40.
Answer:
(-∞, 3) ∪ (3, 4) ∪ (4, ∞)
Step-by-step explanation:
Steps:
1. Read and understand the question. Here, you're being asked for the domain of a rational function, one with a 2nd-degree polynomial in the denominator. The domain is the set of x-values for which the function is defined.
2. Understand that the function will be undefined when the denominator is zero, so to answer the question, you must find the values of x that make the denominator zero.
3. Use any of the methods you have been taught to determine the zeros of the denominator polynomial. For this one, it is convenient to factor it:
x² -7x +12 = (x -3)(x -4)
The values of x that make this zero are 3 and 4, so these values are excluded from the domain.
4. Write an expression in interval notation that includes all real numbers except 3 and 4. That is, you want to translate this to interval notation:
(-∞ < x < 3) ∪ (3 < x < 4) ∪ (4 < x < ∞)
Using what you know about interval notation, you write it as ...
(-∞, 3) ∪ (3, 4) ∪ (4, ∞)