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Ugo [173]
3 years ago
10

MATHS QUESTION Any help for another maths questions I just don't get what to do thank you ❤

Mathematics
1 answer:
levacccp [35]3 years ago
4 0
Look at the picture.

a) 180° - 45° = 135°


b) Use trigonometric function

\tan(\angle DBA)=\dfrac{45}{30}\\\\\tan(\angle DBA)=1.5\\\\m\angle DBA\approx56^o

270° - 56° = 214°


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Solve for the indicated variable in each scientific formula. c=wtc/1000 for w
Hitman42 [59]
First, multiply both sides by 1000
1000*c = w*t*c

Since c is on both sides, they would cancel each other out
1000 = w*t

Divide both sides by t.
w = 1000*t
6 0
3 years ago
Asanji left the science museum and drove toward the lake at an average speed of 45 km/h. Sometime later Huong left driving in th
Cloud [144]

Answer:

Asanji drove for 5 hours before Huong caught up

Step-by-step explanation:

Let the time for which Asanji drove alone is "X" hours

Asanji and Huong met after three hours of driving of Huong.

Total time for which Asanji drove = X+3 hours

Thus, distance travelled by Asanji in X+3 hours is equal to distance travelled by Huong in 3 hours

45 ( X+3) = 75 (3)\\

On solving the above equation, we get -

45 X + (45 *3) = 75 *3\\45 X = (75-45)*3\\45 X = 30 *3 \\X = \frac{30 *3}{45} \\X = 2

Asanji drove for 3 + 2 = 5 hours before Huong caught up

8 0
3 years ago
Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. A vending m
Anuta_ua [19.1K]

Answer:

A) 1.96%

Step-by-step explanation:

You need to know the band between 5.48 g and 5.82 g, the mean is 5.67 g and the standard deviation is .0.070 g, with that information you can calculate the percentage to the left of the mean and the percentage to the right of the mean and add them.

To know its percentage you have to calculate the z score for both values.

z = \frac{x-\mu}{\sigma}

x is the value being evaluated

μ is the mean

σ is the standard deviation

For 5.48 g:

z = \frac{5.48-5.67}{0.070} =-2.714

and is equivalent to 0.0034

For 5.82 g:

z = \frac{5.82-5.67}{0.070} = 2.143

and is equivalent to 0.9838

Those numbers mean that the percentage below 5.48 is equivalent to the 0.34% of the values and the percentage below 5.82 is equivalent to 98.38% of the values. Then the percentage rejected is the percentage above 5.82, 100 - 98.38 = 1.62% plus the percentage below 5.48, 0.34%.

Percentage rejected = 1.62% + 0.34% = 1.96%

7 0
3 years ago
Please help me with this.
Dmitrij [34]

Answer:

the answer is 12

Step-by-step explanation:

4 0
3 years ago
A plane flew a total of 1920 miles at the average rate of speed of 320 mph. How long did it take the plane to cover this distanc
iren2701 [21]

Answer:

t = 6 hours

Step-by-step explanation:

D = r x t

1920 = 320t

divide both sides by 320:

t = 6 hours

4 0
3 years ago
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