Answer:
9. y=9h+4
10. y=5r+10
11. y=4x+8
12. y=4n+9
Step-by-step explanation:
9. He gets 9 dollars per hour (h), and 4 dollars extra for gas.
So 9 dollars per hour plus 4 dollars for the gas
y=9h+4
10. Roses (r) are selling for 5 dollars each and there is a delivery fee of 10 dollars.
So 5 dollars per rose plus 10 dollar fee
y=5r+10
11. The tree increases by 4 feet per year (x), and it is already 8 feet tall.
So 4 feet per year plus 8 feet
y=4x+8
12. Each trophy (n) weighs 4 kilograms, and the box itself weighs 9 kilograms.
So 4 kilograms per trophy plus 9 kilograms for the box.
y=4n+9
The perimeter = 20 and AC = 8
Now as it is not mentioned which sides are equal of the isosceles triangle ABC,
We have two possible situations.
1)
If AC is the base
In that case AB = BC
Now AC = 8, AB = x , BC = x
So x + x + 8 = 20
2x + 8 = 20
2x = 12
x = 6
AB = BC = 6
2)
IF AC is not the base,
Then
AC = BC or AC = AB
So BC = 8 or AB = 8
If AB = AC = 8
Then
BC + 8 + 8 = 20
BC = 4
So there are two possible lengths of BC
Either it is BC = 8 or BC = 6 or BC = 4
The figure is attached for your reference.
<span>3x^2 + 4x + 8 + 2x^2 - 6x + 3 to give result as 9x^2 -2x - 5
</span>3x^2 + 4x + 8 + 2x^2 - 6x + 3
= 5x^2 - 2x + 11
so
9x^2 -2x - 5 - (5x^2 - 2x + 11)
= 9x^2 -2x - 5 - 5x^2 + 2x - 11
= 4x^2 -16
answer
expression (4x^2 -16) must be added to the sum of (3x^2 + 4x + 8) and (2x^2 - 6x + 3) to give the result as (9x^2 - 2x - 5)
Answer:
97.73
Step-by-step explanation: