Answer:
1/25
Step-by-step explanation:
At the start there is a 4/20 (1/5) chance of drawing a blue marble. After putting the marble back in the bag, there is again a 1/5 chance of drawing a blue marble again. To calculate the overall probability, you must multiply the two numbers together: 1/5 x 1/5 = 1/25.
Answer:
z4/x3y2
Step-by-step explanation:
apply the product to a power rule
power rule
negative exponents
Answer:
4 lb
Step-by-step explanation:
10+14+40=64 oz = 4lb
Answer:
£210
Step-by-step explanation:
A decrease of 30% represents 70% of the original cost.
100% represents the original cost
Divide the price by 70 to find 1% then multiply by 100 for original cost
original cost = 
× 100 = 2.1 × 100 = £210
