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Step2247 [10]
3 years ago
15

How many questions does sarah need to answer correctly to improve her grade from 84% to a 95%

Mathematics
2 answers:
SashulF [63]3 years ago
8 0
I think it is 3 it depends on how much points the questions are worth
Leokris [45]3 years ago
5 0
She needs to answer from 10-15
You might be interested in
Simplify 4 to the 7th over 5 squared all raised to the 3rd power
alisha [4.7K]
<h2>Answer:</h2>

\left(\frac{4^{21}}{5^6}\right)

or

4 to the 21st over 5 to the 6th.

<h2>Step-by-step explanation:</h2>

First, we need to write our expression. Let's do it step by step:

<u>4 to the 7th:</u>

4^7

<u>5 squared:</u>

5^2

<u>4 to the 7th over 5 squared:</u>

\frac{4^7}{5^2}

<u>4 to the 7th over 5 squared all raised to the 3rd power:</u>

<u>\left(\frac{4^7}{5^2}\right)^3</u>

Using the law of exponents:

\left(\frac{4^{7\times 3}}{5^{2\times 3}}\right) \\ \\ \left(\frac{4^{21}}{5^6}\right)

Finally, the answer is 4 to the 21st over 5 to the 6th.

8 0
3 years ago
Read 2 more answers
3x + 12 = -3 What is the value of X
Blizzard [7]

Answer:

x = -5

Step-by-step explanation:

i took algebra a couple years ago :)

4 0
2 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7Bx-5%7D" id="TexFormula1" title="\sqrt[3]{x-5}" alt="\sqrt[3]{x-5}" align="abs
sashaice [31]

Answer:

It cannot be solved furthur bro as the value of x is unspecified

6 0
3 years ago
70°<br> 13<br> ४<br> c=<br> 12.2<br> x<br> A
Aleonysh [2.5K]

Answer:

sin70=13/x

\sin(70)  \times x = 13

x = 13 \times  \sin(70)

x = 13 \div 0.9397

13.8

6 0
2 years ago
Use DeMoivre's Theorem to find (3cis*pi/6)^3
Sonbull [250]

The correct value of (3cis(pi/6))³ is 27i.

<h3>What is Complex Number?</h3>

Complex numbers are numbers that consist of two parts — a real number and an imaginary number. Complex numbers are the building blocks of more intricate math, such as algebra.

Given the complex number in polar coordinate expressed as

z = r(cos∅+isin∅)

zⁿ =  {r(cos∅+isin∅)}ⁿ

According to DeMoivre’s Theorem;

zⁿ =  rⁿ(cosn∅+isinn∅)

Given the complex number;

(3cis(pi/6))³

= {3(cosπ/6 + isinπ/6)}³

Using  DeMoivre’s Theorem;

= 3³(cos3π/6 + isin3π/6)

=  3³(cosπ/2 + isinπ/2)

= 3³(0 + i(1))

= 27i

Thus, the correct value of (3cis(pi/6))³ is 27i.

Learn more about Complex number from:

brainly.com/question/10251853

#SPJ1

7 0
2 years ago
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