8x - 5(x - 3) = 18
8x - 5x + 15 = 18
3x = 18 - 15
3x = 3
x = 3/3
x = 1
Option C.
Part A:
C= a + bn
Make the two equations out of the words:
82 = a + b100 * 2.5 = 205 = a + b250
157 = a+ b250
Subtract the two,
205 = a + b250
- ( 157 = a + b250)
48 = a
Find b by substituting in a:
82 = a + b100
82 = 48 + b100
34 = b100
b = 0.34
Answer for part a: a = 48 , b = 0.34
Part B:
C = a +bn <- when n = 300 , put in a and b, then solve
C = 48 + 0.34(300)
C = 48 + 102
C = 150
Cost when hiring a lorry to travel 300 miles is 150 pounds
Answer:
Write the equation as x minus 89 = 7 and add 89 to both sides. The answer is 96.
Step-by-step explanation:
Difference means subtraction. So, x-89=7. To solve it, we are going to add 89 to both sides of the equation, which gives us x=7+89, which is x=96. So, the answer is the second one: Write the equation as x minus 89 = 7 and add 89 to both sides. The answer is 96.
