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2 years ago

I need help with these 2 algebra questions

Mathematics

2 answers:

omeli [17]2 years ago

8 0

Answer:

question.4.

answer . b

question. 5

answer . 7m and -2m

Romashka-Z-Leto [24]2 years ago

3 0

Answer:

Step-by-step explanation:

You might be interested in

What value of x will make the equation below true?<br> 14−(x+7)=3

zalisa [80]

14-x-7=3
7-x=3
-x=-4
x=4

7 0

2 years ago

1. In the spring of 2017, the Consumer Reports National Research Center conducted a survey of 1007 adults to learn about their m

avanturin [10]

Answer:

The correct answer is "1668". A further solution is provided below.

Step-by-step explanation:

According to the question,

Estimated proportion,

$\hat{p} = \frac{574}{1007}$

$=0.57$

Margin of error,

E = 0.02

Level of confidence,

= 90%

= 0.90

Critical value,

$Z_{0.10}=1.65$

Now,

⇒ $0.02=1.65\times \sqrt{\frac{0.57\times 0.43}{n} }$

$0.0004=2.7225\times \frac{0.2451}{n}$

$n=\frac{2.7225\times 0.2451}{0.0004}$

$=1668.21$

or,

$n \simeq 1668$

5 0

3 years ago

Solve log x − 1 16 = 4.

Reptile [31]

I hope this helps you

log(x-1)4^2=4

2.log (x-1)4=4

log (x-1)4=2

log (x-2)2^2=2

2log (x-1)2=2

log (x-1)2=1

[logab=y b=a^y]

b=2 a=x-1 y=1

2=(x-1)^1

x-1=2

x=3

3 0

3 years ago

Last year, Nicholas started babysitting to earn extra spending money. Over the summer, he

Thepotemich [5.8K]

Answer:

25%

Step-by-step explanation:

From the boxplot Given, an earning of $25 or less is represented on the boxplot as the lower quartile of the distribution which is the point at the start of the box. The lower quartile value is the percentage value up to 25% that is the first 25% of the distribution.

Hence, the percentage required = 25%

Hence, Nicholas earned $25 or less about 25% of the time.