Answer:
a = 1, b = 7
Step-by-step explanation:
Given the 2 equations
3a + 6b = 45 → (1)
2a - 2b = - 12 → (2)
Multiply (2) by 3 and add to (1) to eliminate the term in b
6a - 6b = - 36 → (3)
Add (1) and (3) term by term
(3a + 6a) + (6b - 6b) = (45 - 36)
9a = 9 ( divide both sides by 9 )
a = 1
Substitute a = 1 in either (1) or (2) and solve for b
(1) → 3 + 6b = 45 ( subtract 3 from both sides )
6b = 42 ( divide both sides by 6 )
b = 7
I ussually think of them as arrows telling me where to go.
if it is > you go ----->
if it is < you go <------
There is a SINGLE TERM therefore we call it a MONOMIAL.
If there had been TWO TERMS, we would call it a BINOMIAL.
Example: 3x^3 + 7
(Terms are separated by addition/subtraction).
x is the same as x^1.
We suppress the 1 exponent because it isn't meaningful.
We can see that the largest degree (exponent) on our x is 1.
So this is a FIRST DEGREE polynomial.
If we had a larger power of x we would classify it as something else.
Example: -4x^2 is a SECOND DEGREE polynomial.
So put those two pieces of information together.
Our polynomial can be classified as a FIRST DEGREE MONOMIAL.
Hope that helps.
Answer:
904cm3 just use an online sphere calculator they're easy to use
Answer:
140 coins.
Step-by-step explanation:
Let x be the total number of coins in Kate's collection.
We have been given that Kate has a coin collection. She keeps 7 of the coins in a box which is only 5% of her entire collection.
We need to figure out x such that 5% of x equals to 7. We can represent this information in an equation as:
Therefore, the total number of coins in Kate's collection is 140 coins.