Answer: so if C+M=S
You have to subtract selling price and markup to find the seller cost
Step-by-step explanation:
S=1770
M=130
C=1640
S-M=C
BC= 5cm
By calculation, deduce whether triangle ABC is a right-angled triangle
Answer:
ΔABC is not a right- angled triangle
Step-by-step explanation:
Given AB = 8, BC = 5
Then AC = 22 - (8 + 5) = 22 - 13 = 9 cm
Using the converse of Pythagoras' identity
If the square of the longest side equals the sum of the squares of the other 2 sides then triangle is right.
AC² = 9² = 81
AB² + BC² = 8² + 5² = 64 + 25 = 89
81 ≠ 89, hence ΔABC is not right- angled
A candidate for mayor wants to know how strong her support is among voters, so she posts an online survey on her campaign website for voters to take. To determine whether voters would be willing to vote for a tax increase to improve the city's schools, the board of education surveys 500 parents of children in the city's schools. In a bin containing 500 marbles, 180 are red, 240 are blue, and 80 are green. In a bowl of 25 marbles scooped from this bin, how many would be expected to be green? A. 4 B. 8 C. 9 D. 12 A battery manufacturer randomly tests 500 batteries and finds that 3 are defective. A large bin of mixed nuts contains peanuts, cashews, almonds, and walnuts. Sheila scoops out a bowl full of nuts and counts how many of each type she has: 17 peanuts, 9 cashews, 12 almonds, and 10 walnuts.
Why is this sample likely to be biased? A. The entire population of the city was not surveyed. B. Parents of school children are too busy to be bothered with surveys. C. There are not enough people in the sample. D. Parents of school children are more likely to be willing to pay more to improve schools.
How many defective batteries would be expected in a shipment of 12,000 batteries? A. 120 B. 72 C. 60 D. 36
Armando scoops out a bowl of 32 nuts. About how many should he expect to be cashews? A. 5 B. 6 C. 9 D. 18