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3 years ago

Multiplying fractions by whole numbers

Mathematics

1 answer:

Bezzdna [24]3 years ago

8 0

Answer:

its easy

Step-by-step explanation:

take 1/2 times 5 you turn 5 into 5/1 then multiply 10/2 then simplify you get 5

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Use the rules of exponents to evaluate or simplify.write without negative exponents. 1/4^-2=?

Talja [164]

9514 1404 393

Answer:

4² = 16

Step-by-step explanation:

The applicable rule of exponents is ...

1/a^-b = a^b

So, ...

$\dfrac{1}{4^{-2}}=\boxed{4^2 = 16}$

_____

<em>Additional comment</em>

If you were to evaluate this using the Order of Operations, you would evaluate the exponent first:

1/4^-2 = 1/(1/16)

Then, you would do the division.

1/(1/16) = 16

We sometimes find it convenient to manipulate exponential terms to the form with the smallest positive exponents before we begin the evaluation.

5 0

3 years ago

A friend asked lara to help her divide 456.3 by 100. what should lara tell her? a. move the decimal point three places to the ri

Alex73 [517]

Answer:

Step-by-step explanation:

The correct answer is D. If we are multiplying by 10 we would move the decimal place one place to the right to show that the number is now 10 times bigger. If we multiply by one hundred. We are getting 100 times bigger, so we would move the decimal place 2 places to the right.

The opposite is true if we are dividing. Instead of moving the decimal to the right to show that the number is getting bigger, we move to the left to show that the number is getting smaller. If we are getting smaller by 10, we would move the decimal one place to the left. In this case, we are getting 100 times smaller so we move the decimal two places to the left.

3 0

1 year ago

A store is having a 1/8 off sale. What percentage of each item sold does the cashier subtract to find the sale price

Sav [38]

Answer:

8 percent or .8

Step-by-step explanation:

Have a great day

3 0

3 years ago

Al obtener el valor de lo que costará la fiesta de graduación para tu grupo te das cuenta que el lugar que decidieron alquilar p

dybincka [34]

Explicación paso a paso:

Debemos buscar el costo de cada boleto y la cantidad de personas que deben ir.

Dada la función que da forma al comportamiento expresado como;

f (x) = (-2x) ^ 2 + 80x + 300 donde;

x es el costo de cada boleto

f (x) es el número de personas que deben ir

Para obtener x, usaremos la expresión;

x = -b / 2a

De la ecuación cuadrática dada, a = -2, b = 80 yc = 300

Sustituir;

x = -80/2 (-2)

x = -80 / -4

x = 80/4

x = 20

Por lo tanto, el boleto cuesta $ 20.

Lo siguiente es obtener la cantidad de personas que deben ir. Para conseguirlo, sustituiremos x = 20 en la expresión modelada como se muestra;

f (x) = (-2x) ^ 2 + 80x + 300

f (20) = (-2 (20)) ^ 2 + 80 (20) +300

f (20) = (-40) ^ 2 + 1600 + 300

f (20) = 1600 + 1600 + 300

f (20) = 3500

Por lo tanto, 3500 personas tienen que ir

8 0

3 years ago

Mai bought a television for $330. The tax rate is 8%.

erica [24]

1 % of 330 is 3.3 and 3.3x8=26.4 so 26.4+330=356.4
356.4

6 0

3 years ago