The sum of all the angles in this line equals 180
a+90+21=180
a+111=180
a=69
Answer:
1. BC = 18
2. m<ABC = 80°
3. x = 5
Step-by-step explanation:
1. If DE = 9, therefore:
(based on the midsegment theorem, DE is half the length of the third side, BC)
2. m<ADE = 80°, then,
m<ABC = 80°
This is because m<ADC and m<ABC are corresponding angles. Corresponding angles are congruent.
3. DE = 2x + 7 , and BC = 7x - 1, find BC
Thus:
(midsegment theorem)
(substitution)
Solve for x
Collect like terms
Divide both sides by 3
x = 5
Answer:
B. NON-REPRESENTATIVE
Step-by-step explanation:
<em>The sample does not represent the population as a researcher is taking a sample from the hospital where the cholesterol level of the patient is generally high and the researcher is not randomly selecting the U.S. citizens.</em>
Thus, option (B) is correct.
Further, the sample is a subset of the population and it is easy to analyze as compared to the population.
The sample is said to be representative if it represents the whole population.
Answer:
11.25
Step-by-step explanation:
4.5 / 2 = 2.25 cups/ cup rice
2.25 x 2 cups of rice = 4.5 cups of water.
5 x 2.25 = 11.25
