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3 years ago

I NEED HELPPP AHHHHHH!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

alex41 [277]3 years ago

7 0

Step-by-step explanation:

5)supplement : 180-10= 170°

5)supplement : 180-10= 170°Complement =90-10= 80°

5)supplement : 180-10= 170°Complement =90-10= 80°6)

5)supplement : 180-10= 170°Complement =90-10= 80°6)supplement : 180-42.5= 137.5°

5)supplement : 180-10= 170°Complement =90-10= 80°6)supplement : 180-42.5= 137.5°Complement =90-42.5= 47.5°

5)supplement : 180-10= 170°Complement =90-10= 80°6)supplement : 180-42.5= 137.5°Complement =90-42.5= 47.5°7)

5)supplement : 180-10= 170°Complement =90-10= 80°6)supplement : 180-42.5= 137.5°Complement =90-42.5= 47.5°7)supplement : 180-80= 100°

5)supplement : 180-10= 170°Complement =90-10= 80°6)supplement : 180-42.5= 137.5°Complement =90-42.5= 47.5°7)supplement : 180-80= 100°Complement =90-80= 10°

5)supplement : 180-10= 170°Complement =90-10= 80°6)supplement : 180-42.5= 137.5°Complement =90-42.5= 47.5°7)supplement : 180-80= 100°Complement =90-80= 10°8) False

9) True

10) True

) True11) True

) True11) True12) True

) True11) True12) True13) True

) True11) True12) True13) True14) False

Tju [1.3M]3 years ago

6 0

5. complementary = 80 degrees
supplementary = 170 degrees

6. complementary = 47.5 degrees
supplementary = 137.5 degrees

7. complementary = 10 degrees
supplementary = 100 degrees

8. false
9. true
10. true
11. true
12. false
13. true
14. false

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Could some one please help me with this

Elden [556K]

Answer:

x=40°

Step-by-step explanation:

Firstly, lets look at some things that we know based on this image:

We have a equilateral triangle(The triangle on the left has 3 tick marked on the sides, so they are equal. It also has 3 of the same angle, so it must be equilateral) and a isosceles triangle (There are two tick marks showing that two of the sides are equal length), the measure of each of the equilateral triangle's angles must be 60° each, the measure of these two triangles together must be 360°, and angle x and the unmarked angle must be the same size as this triangle is isosceles.

To solve this, we can set up an equation to solve for x. To do this, we can add up all of the known angles and set it equal to 360.

$(100+60)+60+(60+x)+x=360\\\\160+60+60+2x=360\\\\280+2x=360\\\\2x=80\\\\x=40$

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3 years ago

A farmer has a rectangle field with a perimeter of 5.4 miles and a length of 2.3 miles. Find the width of the field. The width o

Alja [10]

Answer:

Step-by-step explanation:

perimeter = 2*(length + width)

53 m = 2*(2.3 m +w) . . . . an equation to find the width, w

26.5 m = 2.3 m +w . . . . . divide by 2

24.2 m = w . . . . . . . . . . . subtract 2.3 m

The width of the rectangle is 24.2 m

hope it helps

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3 years ago

Read 2 more answers

A man can drive a motorboat 70 miles down the Colorado River in the same amount of time that he can drive 40 miles upstream. Fin

pochemuha

The speed of the current is 40.34 mph approximately.

<u>SOLUTION: </u>

Given, a man can drive a motorboat 70 miles down the Colorado River in the same amount of time that he can drive 40 miles upstream.

We have to find the speed of the current if the speed of the boat is 11 mph in still water. Now, let the speed of river be a mph. Then, speed of boat in upstream will be a-11 mph and speed in downstream will be a+11 mph.

And, we know that, $\text{ distance } =\text{ speed }\times \text{ time }$

$\begin{array}{l}{\text { So, for upstream } \rightarrow 40=(a-11) \times \text { time taken } \rightarrow \text { time taken }=\frac{40}{a-11}} \\\\ {\text { And for downstream } \rightarrow 70=(a+11) \times \text { time taken } \rightarrow \text { time taken }=\frac{70}{a+11}}\end{array}$

We are given that, time taken for both are same. So $\frac{40}{a-11}=\frac{70}{a+11}$

$\begin{array}{l}{\rightarrow 40(a+11)=70(a-11)} \\\\ {\rightarrow 40 a+440=70 a-770} \\\\ {\rightarrow 70 a-40 a=770+440} \\\\ {\rightarrow 30 a=1210} \\\\ {\rightarrow a=40.33}\end{array}$

8 0

3 years ago

PLZ HELP PLZ PLZ PLZ HELP

faust18 [17]

Answer:the diameter is 7

Step-by-step explanation: 21.98 divide by pi is 7 so diameter is 7

5 0

3 years ago

It has a time to failure distribution which is normal with a mean of 35,000 vehicle miles and a standard deviation of 7,000 vehi

Triss [41]

Answer:

The designed life should be of 21,840 vehicle miles.

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean of 35,000 vehicle miles and a standard deviation of 7,000 vehicle miles.

This means that $\mu = 35000, \sigma = 7000$

Find its designed life if a .97 reliability is desired.

The designed life should be the 100 - 97 = 3rd percentile(we want only 3% of the vehicles to fail within this time), which is X when Z has a p-value of 0.03, so X when Z = -1.88.

$Z = \frac{X - \mu}{\sigma}$

$-1.88 = \frac{X - 35000}{7000}$

$X - 35000 = -1.88*7000$

$X = 21840$

The designed life should be of 21,840 vehicle miles.

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3 years ago