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2 years ago

Convert 8/20 to a decimal.

1 answer:

5 0

Other than plugging 8/20 into a calculator, you can use the fraction’s equivalent of 40/100 to convert into a decimal instead.

40/100 = 0.4

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Solve the system of linear equations by graphing. 2x + 3y = 16.9 5x = y + 7.4

GuDViN [60]

the intersecting point of the two lines is (2.2999999,4.1)

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3 years ago

Pamela is 13 years younger than jiri. The sum of their ages is 41. What is jiri’s age?

Tju [1.3M]

Answer:

Step-by-step explanation:

Pamela is 13 years younger than Jiri and the sum of their ages is 41, therefore (x=Jiri's age) (x-13) + x = 41) 2x-13=41 x=14. Pamela is 14 and Jiri is 27

6 0

3 years ago

Read 2 more answers

Find the derivative of f(x)= e^(4x) + e^-(4x)

ololo11 [35]

Answer:

$f'(x)=4e^{4x} -4e^{-4x}$

Step-by-step explanation:

To find this derivative, we will need to use the chain rule.

As there is a variable in the exponent we can use this formula:

$f'(x)=u'e^u$

In this case, $u=4x$ and $u=-4x$

This means that $u'=4$ and $u'=-4$ respectively

This gives us $f'(x)=4e^{4x} -4e^{-4x}$

4 0

2 years ago

Read 2 more answers

The teacher separated her class of twenty -eight students into two groups. One group has 4 more than twice as many students as t

stiv31 [10]

The class has 28 student. One group has four more students so surat 4 from 28. 28-4=24 since one of the groups have twice as many students as the other divide 24 by 3. 24 / 3 = 8. It says 1 group has for more than twice the other group so that would mean 2/3 of 24 and 4 would be the answer 16+4=20. The first group had 8 students, the other group has 20 students.

4 0

3 years ago

The parabola y = x² - 4 opens: A.) up B.) down C.) right D.) left

fomenos

Answer:

Step-by-step explanation:

Here the easy rules to remember the orientation of the parabolas are

a) If x is squared it opens up or down. And its coefficient of { $x^{2}[tex] is negative it opens down.b) If y is squared it opens side ways right or left. It its coefficient of [tex]y^{2}$

Hence in our equation of parabola

$y = x^ 2-4$

x is squared and its coefficient is positive , hence it opens up towards positive y axis.

3 0

2 years ago