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2 years ago

I need help with 53 × 1.2 ≈ And 2.1 × 82 ≈ _

Mathematics

1 answer:

Mrac [35]2 years ago

3 0

53x1.2=63.6 and 2.1x82=98.4

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Find the inverse function y=-5x+20

Nezavi [6.7K]

Answer:

$y= \frac{-1}{5} x +4$

Step-by-step explanation:

We can find the inverse function of this excercise, isolating X and then changing the variables.

$y=-5x+20\\y-20=-5x\\\frac{y-20}{-5} =x\\$

$\frac{y}{-5}-\frac{20}{-5} = x\\\frac{-1}{5}y+\frac{20}{5} =x\\ \frac{-1}{5}y+4 =x$

And now we change the variables and we get the inverse function:

$y= \frac{-1}{5} x +4$

7 0

2 years ago

Pemdas, thank you! <br>(-8 × -6) -4²

Aleksandr-060686 [28]

Answer:

Step-by-step explanation:

(-8 × -6) - 4²

48 - 4²

48 - 16 = 32

P - Parentheses

E - Exponents

M - Multiplication

D - Division

A - Addition

S - Subtraction

8 0

2 years ago

Read 2 more answers

A 2-kg sausage is divided into several 100-g portions. How many portions are there?

Mademuasel [1]

Answer:

20 portions

Step-by-step explanation:

2 kg = 2000 g

2000 / 100 = 20

Hope this helped! :)

7 0

3 years ago

Can y’all help me plz?

gulaghasi [49]

Answer:

Step-by-step explanation:

Pythagreom Therom:

a^2+b^2=c^2

12^2+5^2=c^2

144+25=c^2

169=c^2

c=13

3 0

2 years ago

The mean number of hours of part-time work per week for a sample of 526526 college students is 2828. If the margin of error for

sveta [45]

Answer:

The 99% confidence interval for the mean number of hours of part-time work per week for all college students is between 25.8 and 30.2.

Step-by-step explanation:

A confidence interval has the following format.

$\mu_{x} \pm M$

In which $\mu_{x}$ is the mean of the sample and M is the margin of error.

In this problem, we have that:

$\mu_{x} = 28, M = 2.2$

$\mu_{x} - M = 28 - 2.2 = 25.8$

$\mu_{x} + M = 28 + 2.2 = 30.2$

The 99% confidence interval for the mean number of hours of part-time work per week for all college students is between 25.8 and 30.2.

4 0

3 years ago