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3 years ago

PLEASE HELP QUICKLY WILL GIVE BRAINLEST

Mathematics

1 answer:

zepelin [54]3 years ago

7 0

x = 45%

Step-by-step explanation:

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Will give brainly if ur right and maybe a kiss

Dennis_Churaev [7]

Answer:

14x²(2x³ + 1)

Step-by-step explanation:

Split the value: 28x⁵

28x⁵ = 28x³x²

14x² + 28x³x²

28 = 14 × 2

14x² + 14 · 2x³x²

Factor:

14x²(2x³ + 1)

No homo

6 0

3 years ago

Please help asap!!!!! At Sarah's cafe, customers can choose one of the following entrees: burrito, pasta, soup or taco. They can

k0ka [10]

Answer:

120 different meals.

Step-by-step explanation:

Start with the entrees: There are 4

There are side dishes : 4

Drinks: 5

The side dishes can be 4!/(2!2!) (order does not matter here). There are 6 ways.

The entrees are 1 of 4: 4

And 5 drinks

P(dinner) = 5 * 4 * 6 = 120

8 0

3 years ago

Read 2 more answers

Which logarithmic equation is equivalent to the exponential equation below? e^a=55

Volgvan

Answer:

The answer is B.

e^a=55

Taking log on both sides,

lne^a = ln 55

a lne= ln55

a= ln55.

7 0

3 years ago

What is the following quotient?

seropon [69]

Answer: Choice B) $\frac{5\sqrt{11}+5\sqrt{3}}{8}\\\\$

==========================================

Work Shown:

$\frac{5}{\sqrt{11}-\sqrt{3}}\\\\\\\frac{5(\sqrt{11}+\sqrt{3})}{(\sqrt{11}-\sqrt{3})(\sqrt{11}+\sqrt{3})}\\\\\\\frac{5\sqrt{11}+5\sqrt{3}}{(\sqrt{11})^2-(\sqrt{3})^2}\\\\\\\frac{5\sqrt{11}+5\sqrt{3}}{11-3}\\\\\\\frac{5\sqrt{11}+5\sqrt{3}}{8}\\\\\\$

This shows why choice B is the answer.

---------------

Explanation:

In the second step, I multiplied top and bottom by $(\sqrt{11}+\sqrt{3})$
This is so we can apply the difference of squares rule in step 3. The difference of squares rule is (x-y)(x+y) = x^2-y^2.
In step 4, the square roots cancel out with the squaring operation. The two operations are inverses of one another, which is why they cancel.

So in general, if the denominator is $\sqrt{a}-\sqrt{b}$ and you want to rationalize the denominator, then you should multiply top and bottom by $\sqrt{a}+\sqrt{b}$ . The same applies in reverse as well.

This leads to the denominator becoming $(\sqrt{a}-\sqrt{b})(\sqrt{a}+\sqrt{b}) = (\sqrt{a})^2-(\sqrt{b})^2 = a-b$

Keep in mind that $a \ge 0$ and $b \ge 0$

4 0

3 years ago

Find the area of the rectangle 12ft by 9ft

Shtirlitz [24]

The area is 12X9=108ft^2

6 0

4 years ago