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3 years ago

100 g of fish cost 70¢.

Mathematics

1 answer:

Sloan [31]3 years ago

6 0

a) It will be 70*180= 12600

b) 73.46

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Which equation has infinite solutions?

Sonja [21]

Answer:

a 3x-7=12x

Step-by-step explanation:

=6.33333333

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3 years ago

Three workers have to do a certain job. The first worker can finish the job in 8 hours. The second worker can finish the job in

Ainat [17]

This means that...

the first worker does 1/8 of the job each hour.

the second worker does 1/4 of the job each hour.

the third worker does 1/4 of the job each hour.

So together they get 1/8+1/4+1/4 of the job done per hour.

Rate: 5/8 of the job per hour

Now if we know the rate, the job will be finished in...

1/(5/8) hours ----> 1.6 hours or 1 hour and 36 minutes

answer: 1.6 hours or 1 hour and 36 minutes

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3 years ago

The graph below shows a quadratic function f(x) and an absolute value function g(x)

Sophie [7]

Answer:

The x-values that are approximate solution of the equation $f(x) = g(x)$ are $x_{1} \approx -3.5$ and $x_{2}\approx 5$ , respectively.

Step-by-step explanation:

From graph we infer that the x-values that represents a solution to the system of equations corresponds to those values of x in which both functions coincide. As we see, there are two x-values for $f(x) = g(x)$ , which are described below:

$x_{1} \approx -3.5$ and $x_{2}\approx 5$

The x-values that are approximate solution of the equation $f(x) = g(x)$ are $x_{1} \approx -3.5$ and $x_{2}\approx 5$ , respectively.

6 0

4 years ago

Julia wants to estimate the percentage of people who submit their tax returns online. She surveys 330 individuals and finds that

larisa86 [58]

Answer: 0.0432

Step-by-step explanation:

Formula of Margin of Error :-

$E=z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

Given : Sample size : n= 400

The proportion of individuals use public transportation.= $\dfrac{65}{330}\approx0.20$

Level of confidence = 0.95

Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.96$

Substitute the values in the given formula , we get

$E=(1.96)\sqrt{\dfrac{0.2(1-0.2)}{330}}\\\\\Rightarrow\ E=0.043157779593\approx0.0432$

Hence, the margin of error for the confidence interval for the population proportion with a 95% confidence level. = 0.0432

6 0

3 years ago

Can someone show me how to do this ?

Savatey [412]

The point slope formula is y - y1 = m(x - x1)

the value x1 is the x coordinate of a point
the value y1 is the y coordinate of a point
the value m is the slope, which is 3

therefore, x1 = -2 & y1 = 1

Then, all you do is plug in the points:

y - 1 = 3(x + 2)

NOTE: It is 3(x + 2) instead of 3(x - 2) because the formula is (x - x1). If you plug x1 in, it is (x - (-2)). 2 negatives cancel out to be a positive, so it is (x + 2)

7 0

3 years ago