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katen-ka-za [31]
3 years ago
14

A. 25B. 40C. 250D. 400Help me please and tha k you​

Mathematics
1 answer:
masha68 [24]3 years ago
7 0
A your very welcome
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I need help!!!!!!!!!!!!!!
Paladinen [302]

Answer:

1. x=3

2. x=2

3. 0 i think

4. y=6

5. x=7/5

Bonus: k=6

Step-by-step explanation:

combine like terms

7 0
2 years ago
Consider x^2 + (b/a)x = (-c/a). Which variable cannot have a value of zero? Justify your answer.
GREYUIT [131]
The answer is C because if something is divided by zero, it is undefined.
5 0
3 years ago
$20 haircut with 10% and 7% tax
Anika [276]

20 * .10 = 2  <em>(2 = 10% of 20)</em>

20 + 2 = 22

20 x .07 = 1.4  <em>(1.4 = 7% of 20)</em>

20 + 1.4 = 21.4

The price of a 20$ haircut with a 10% tax would be $22.

The price of a 20$ haircut with a 7% tax would be $21.40.

4 0
3 years ago
In this diagram, which equation could you prove to be true in order to conclude that the lines are parallel?
Sladkaya [172]

THE ANSWER:

c−ab=de

THIS IS WHY:

4 0
3 years ago
A private opinion poll is conducted for a politician to determine what proportion of the population favors adding more national
Ksju [112]

Answer:

n≅376

So sample size is 376.

Step-by-step explanation:

The formula we are going to use is:

n=pq(\frac{z_{\alpha/2}}{E})^{2}

where:

n is the sample size

p is the probability of favor

q is the probability of not in favor

E is the Margin of error

z is the distribution

α=1-0.98=0.02

α/2=0.01

From cumulative standard Normal Distribution

z_{\alpha/2}=2.326

p is taken 0.5 for least biased estimate, q=1-p=0.5

n=0.5*0.5(\frac{2.326}{0.06})^{2}\\n=375.71

n≅376

So sample size is 376

4 0
3 years ago
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