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2 years ago

How to solve radical 28 plus radical 64

1 answer:

8 0

The solution to the problem is as follows:

√28 = √(4 * 7) = √4 * √7 = 2√7.

√64 = 8

Therefore, √28 + √64 = 2√7. + 8

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It is about solving equations by substitution. if you can help plzzz

Lyrx [107]

Message me, and i can help more:)

6 0

2 years ago

Seven blue and four red balls are to be arranged in order. How many ways can this be done if (1) The blue balls are distinguisha

Sav [38]

Answer:

1) n = 39916800

2) n = 1663200

3) n = 330

Step-by-step explanation:

1) If the blue balls are distinguishable as are the red balls

Then you can arrange these balls in the following ways, we must use a permutation

In totally we have 11 balls, then

n = 11P11

$n = \frac{11!}{(11-11)!} = 11! = 39916800\\$

2) If Blue balls are distinguishable, but the red balls are identical

In this case, we need to do a correction due to the red balls are identical and we cannot identify the difference when we interchange two red balls

$n = \frac{11!}{4!} = \frac{39916800}{24} = 1663200$

3) If the balls of each color are indistinguishable

We proceed equal to the before case but we include a correction due to blue balls also

$n = \frac{11!}{4!*7!} = \frac{39916800}{24*5040} = 330$

7 0

2 years ago

What are these questions

Anna007 [38]

Answer:

Step-by-step explanation:

Fractions

7 0

2 years ago

Minny has two coupons, but can use one of them. The first one is for $5 off an item; the second coupon is for 20% off an item. T

joja [24]

Let's first solve for the $5 off coupon,

$28 - 5 = 23$

The final total is $23.00 with $5 off.

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Now for the final price of the 20% off coupon,

$20\% = 0.2$

0.2 or 0.20 is decimal form of 20%. Easier to multiply than in percent form!

$0.2 \times 28 = 5.6$

$5.6 or $5.60 is 20% of 28, we're not done yet!

Lastly, subtract 20% off of 28 (5.6) from 28,

$28 - 5.6 = 22.4$
$22.4 or $22.40 is the final after 20% off!

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Q. Which is less after the discounts??

$23.00 or $22.40

A. $22.40 of course which was the 20% off.

Part A : Which coupon should she use ?

Answer : Well, to get a lower price, less to pay, the 20% off coupon is better!

Part B: How much money will she save by using the better coupon?

Answer : $5.6 / $5.60 is the amount she'll save!

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I hope that helps you out!!

Any more questions, please just ask me!!

~ Zoey

5 0

2 years ago

andrea drove 200 miles using 9 gallons of gas. At this rate, how many gallons of gas would she need to drive 420 miles?

Anika [276]

Given : Andre drove 200 Miles using 9 Gallons of Gas

⇒ Andre drives 1 Mile using $[\frac{9}{200}]\;Gallons\;of\;Gas$

⇒ Andre drives (420 × 1 Mile) using $[\frac{420\times9}{200}]\;Gallons\;of\;Gas$

⇒ Andre drives 420 Miles using 18.9 Gallons of Gas

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2 years ago