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3 years ago

I need help ASAP please

Mathematics

1 answer:

Vilka [71]3 years ago

3 0

Answer:A -3,6

Step-by-step explanation: Substitue the answers in and they work out

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What is the value of the expression (3a-b)/(6(b+a) when a = 4 and b = -2?

Radda [10]

Answer:

5/8 or 0.625

I hope this helped!

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3 years ago

Write to explain why i understand 4 tens and 14 tens name the same amount

arsen [322]

Because 4 is in the 10's place and 14's 4 is also in the tens place

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3 years ago

A particular fruit's weights are normally distributed, with a mean of 476 grams and a standard deviation of 36 grams. The heavie

4vir4ik [10]

Answer:

Step-by-step explanation:

Given that:

mean (μ) = 476 grams, standard deviation (σ) = 36 grams. P(z) = 19%

The z score shows by how many standard deviation the raw score is above or below the mean. It is given by the equation:

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

Since the 19% weigh more, therefore 81% (100% - 19%) weigh less.

From the normal distribution table, the z score that corresponds to a probability of 81%(0.81) = 0.87

We substitute z = 0.88 in the z score equation to find the raw score. Therefore:

$z=\frac{x-\mu}{\sigma}\\0.87=\frac{x-476}{36}\\ x-476=31.32\\x=31.32+476\\x=507.32\\$

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Therefore 19% of fruits weigh more than 507 grams

7 0

3 years ago

60 minutes is 20% of<br> minutes.

PilotLPTM [1.2K]

Answer:

60 minutes is 20% of 300 minutes

Step-by-step explanation:

let x be the number of total minutes

60 = 20% of x

20% = 1/5

60 = 1/5x

multiply both sides by 5

300 = x

x = 300 minutes

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3 years ago