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Greeley [361]
3 years ago
9

BRAINLIEST FOR FIRST ANSWER! PLS GIVE FULL EXPLANATION :)

Mathematics
1 answer:
S_A_V [24]3 years ago
6 0

Answer:

∠MEJ=25°

Step-by-step explanation:

step 1

Find the value of x

we know that

arc LJ+arc KM+arc KL+arc MJ=360° ----> complete circle

substitute the values

(4x+50)°+6x°+(x+10)°+4x°=360°

solve for x

(15x+60)°=360°

x=300°/15=20°

step 2

Find the measure of angle MEJ

we know that

The measurement of the external angle is the semi-difference of the arcs which comprises

∠MEJ=(1/2)[arc MJ-arc KL]

arc MJ=4(20°)=80°

arc KL=20°+10°=30°

substitute the values

∠MEJ=(1/2)[80°-30°]=25°

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It has been decided that 100 people need to be surveyed to decide the publics opinion on a school building project. A student su
Morgarella [4.7K]

Answer:

The proposed way of sampling is a biased way to perform the survey.

Step-by-step explanation:

Convenience sampling is a kind of non-probability sampling method that comprises of the sample being taken from that portion of the population that is near to hand.  In this type of sampling method, all items doesn’t have an equivalent chance of being selected, which doesn’t comprises of random collection of items.

Convenience sampling is where we take in items which are easy to reach.

Convenience sampling consists of selection bias, i.e.e the bias involved in the sample due to inappropriate selection procedures.

For example, randomly selecting 4 people sitting near him to guesstimate the mean age of the class is a convenience sampling example. or gathering information on customer satisfaction by interviewing 6 randomly selected customers from a local store is an illustration of convenience sampling.

In this case, the sample suggested by the students consists of surveying the first 100 people who enter the school, about the public opinion on a school building project.

This is an example of convenience sample.

So, there is a selection bias present in the sample.

Thus, the proposed way of sampling is a biased way to perform the survey.

4 0
3 years ago
A DVD was priced at $2.87 last week. This week the same DVD is priced at $10.59. What is the percent increase in price?
solniwko [45]

Answer:

Percentage increase = 269%

Step-by-step explanation:

Price of a DVD last week = $2.87

Price of the same DVD this week = $10.59

Increase in the price of DVD between last week and this week = 10.59 - 2.87

= $7.72

Therefore, percentage increase in the price of DVD = \frac{\text{Increase in the price}}{\text{Price of DVD last week}}\times 100

= \frac{7.72}{2.87}\times 100

= 268.99

= 269%

6 0
3 years ago
BRAINLIEST ANSWER!! The product of 3, and a number increased by seven, is -36. Translate the equation, then solve.
EleoNora [17]

Product is multiplication.

Let the number = x


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Use distributive property:

3x +21 = -36

Subtract 21 from each side:

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Divide both sides by 3:

x = -57 /3

x = -19


Check: 3 * (-19 +7) = 3 * -12 = -36


The number is -19


4 0
3 years ago
Solve this and show work​
just olya [345]

Answer:

1.71

Step-by-step explanation:

x/4 = 3/7

4 * 3 = 12

12/7 = 1.714285714285714

Rounded to the nearest hundreths, the answer is  1.71

6 0
3 years ago
Express 2 1/2kg as grams
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8 0
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