3 years ago

∠A and \angle B∠B are complementary angles. If m\angle A=(2x+10)^{\circ}∠A=(2x+10)

Mathematics

1 answer:

vlada-n [284]3 years ago

3 0

Answer:

Step-by-step explanation:

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Solve using the substitution method.

Brilliant_brown [7]

Answer:

x = 1, y = 4

Step-by-step explanation:

This is very simple

Since you have 2 equations with the same coefficient of x, just minus one equation from another:

x + 3y = 13

x + 2y = 9

1y = 4

Sub y = 4 into any of the 2 equation,

x + 3(4) = 13

x + 12 = 13

x = 13 - 12

= 1

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3 years ago

the mean monthly income of trainees at a local mill is 1100 with a standard deviation of 150. find rthe probability that a train

Lunna [17]

Answer:

The probability is $P(X < 900 ) = 0.0918$

Step-by-step explanation:

From the question we are told that

The sample mean is $\= x = 1100$

The standard deviation is $\sigma = 150$

The random number value is x =900

The probability that a trainee earn less than 900 a month is mathematically represented as

$P(X < x) = P(\frac{X -\= x}{\sigma} < \frac{x -\= x}{\sigma} )$

Generally the z-value for the normal distribution is mathematically represented as

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

So From above we have

$P(X < 900 ) = P(Z < \frac{900 -1100}{150} )$

$P(X < 900 ) = P( Z$

Now from the z-table

$P(X < 900 ) = 0.0918$

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4 years ago

What is three and nine tenths times negitive nine and three fourths

nata0808 [166]

Answer:

27- & 21/40 ( Sorry if this is wrong)

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sashaice [31]

I think it b but I’m not sure

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3 years ago

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Line has the equation y=

zlopas [31]

There is no slope answer is = 0

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