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3 years ago

which ordered pair is a solution to the system?. {x+4y=19. {y=-2x-4. . a) (-5, 6). b) (-2, 0). c) (3, 4). d) (7,3)

Mathematics

1 answer:

jarptica [38.1K]3 years ago

3 0

Apply substitution

x+4(-2x-4)=19

x – 8x – 16 = 19

-7x = 19 + 16

-7x = 35

x = -5

Then substitute this value to the other equation

y=-2x-4

y = -2(-5) – 4

y = 10 – 4

y = 6

the answer is then letter A. (-5,6)

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Answer:

Brian has $776 more account in his account than Chris.

Step-by-step explanation:

Compound interest Formula:

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r= Rate of interest

t= Time in year

Given that,

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Here P = $10,000 , r= 4%=0.04, t=10 years

The amount in his account after 10 years is

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Five years after Brian's investment,Chris invests $10,000 in an account earning 7% interest, compounded annually for 5 years.

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From the it is cleared that Brian has $(14802-14026)=$776 more account in his account than Chris.

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2 years ago

Seventy million pounds of trout are grown in the U.S. every year. Farm-raised trout contain an average of grams of fat per pound

STatiana [176]

Complete question is:

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Answer:

Probability = 0.0277

Step-by-step explanation:

We are given;

Mean: μ = 32

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To solve this question, we would use the equation z = (x - μ)/(σ/√n) to find the z value that corresponds to 29.7 grams of fat.

Thus;

z = (29.7 - 32)/(7/√34)

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From the standard z table and confirming with z-calculator, the probability is 0.0277

Thus, the probability to select 34 fish whose average grams of fat per pound is less than 29.7 = 0.0277

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Answer:

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