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3 years ago

-5a-9+a=15 Explain please

Mathematics

2 answers:

IgorC [24]3 years ago

8 0

Answer:

a = -6

Step-by-step explanation:

-5a-9+a=15

Combine like terms

-5a+a -9 = 15

-4a -9 = 15

Add 9 to each side

-4a -9+9 = 15+9

-4a = 24

Divide by -4

-4a/-4 = 24/-4

a = -6

Artist 52 [7]3 years ago

5 0

Answer:

a = -6

Step-by-step explanation:

1. Combine like terms: -4a – 9 = 15

2. Use the additive property of equality to add 9 to both sides: -4a = 24

3. Use division property of equality to divide -4 on both sides: a = -6

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2 years ago

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Step-by-step explanation:

From a population (Bernoulli population), 90% of the bearings meet a thickness specification, let $p_1$ be the probability that a bearing meets the specification.

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Convert this to a normal distribution,

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Variance: $\sigma_1^2=n_1p_1(1-p_1)=500\times0.9\times0.1=45$

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So, $X\geq 440.$

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Hence, the probability that a given shipment is acceptable is 0.94.

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Denote the probability od acceptance of a shipment by $p_2$ .