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3 years ago

Please help on this!!!! Thanks!!

Mathematics

2 answers:

vesna_86 [32]3 years ago

6 0

Answer:

TU = 2 (HD)

Hence, TU = 80

Step-by-step explanation:

line formed by joining 2 mid points of a traingle = 0.5 times of length of 3rd side.

vivado [14]3 years ago

5 0

Answer:

I think it is 92. UV and TV are the two sides of the triangle, and yoy are left with the longest side (hypotenuse). Therefore you can use the pythagorean theorem to find your answer a²+b²=c²

So 40+52=92

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A construction manager needs 12 workers to complete a building project in 54 days. Find in terms of T the number of workers need

ch4aika [34]

Answer:

Step-by-step explanation:

A construction manager needs 12 workers to complete a building project in 54 days, we can write;

12 workers = 54 days

T find the number of workers needed to complete the same project in T days, we will write;

x workers = T days

Divide both equations

12/x = 54/T

Cross multiply

12T = 54x

x = 12T/54

x = 2T/9

Hence the number of workers needed to complete the same project in T days is 2T/9 workers

7 0

3 years ago

Here are two rectangles.

fgiga [73]

Answer:

$\boxed {\frac{2}{3}}$

Step-by-step explanation:

The two rectangles are similar and the scale factor is $\boxed {\frac{2}{3}}$

8 0

3 years ago

The General Social Survey reported a sample where about 61% of US residents thought marijuana should be made legal. If we wanted

bazaltina [42]

Answer: we need to survey 2285 Americans.

Step-by-step explanation:

When population proportion (p) is known, then the formula to evaluate the sample size( minimum) is given by :-

$n=p(1-p)(\frac{z^*}{E})^2$ , where E = margin of error , z* = critical z-value.

Given: p= 0.61, E=0.02, Critical z value for 95% = 1.96

Required sample size: $n=(\frac{1.96}{0.02})^2(0.61)(1-0.61)$

$=(98)^2(0.61)(0.39)\\\\=9604(0.61)(0.39)\\\\\approx$$2285$

Hence, we need to survey 2285 Americans.

3 0

3 years ago

What kind of association is this, negative or positive?

erik [133]

Answer:

negative association

Step-by-step explanation:

This diagram is a scatter plot which represents a set of data. Data on a scatter plot can fit one of three descriptions: positive (increasing), negative (decreasing) or no association (points do not form any kind of line). Given this data and the line of best fit, or the line that pass through the majority of the points, it is a decreasing line. Since the line goes downhill, it is a negative association.

7 0

4 years ago

In triangle ABC, the lengths of the sides in feet are a=23, b=14, c=18 . Find angle C.

Thepotemich [5.8K]

Answer: Angle C = 51.5°

Step-by-step explanation:

The diagram of the triangle is shown in the attached photo.

we would apply the law of Cosines which is expressed as

c² = a² + b² - 2bcCosC

Where a,b and c are the length of each side of the triangle and C is the angle corresponding to c.

Therefore,

18² = 23² + 14² - 2(23 × 14)CosC

324 = 529 + 196 - 2(322)CosC

324 = 725 - 644CosC

644CosC = 725 - 324

644CosC = 401

CosC = 401/644

CosC = 0.623

C = Cos^- 1(0.623)

C = 51.5° to the nearest tenth

7 0

4 years ago