Jack is 2 times as old as Lacy. 5 years ago the sum of their ages was 20. How old are they now?

Plz help me thanks so mycghh

saw5 [17]

4!! Because it makes the most sense

7 0

3 years ago

PLEASE help me with this question! This is URGENT!

gavmur [86]

Answer:

$\frac{1}{3x+52}$

Step-by-step explanation:

We begin with the expression

$\frac{\frac{1}{x^2+51x+50} }{\frac{2}{x+50}+\frac{1}{x+1} }$

First, we can split this into the product of two fractions

$\frac{1}{x^2+51x+50} *(\frac{1}{\frac{2}{x+50}+\frac{1}{x+1}} )$

Now, we can factor the denominator of the first fraction.

$\frac{1}{(x+1)(x+50)} *(\frac{1}{\frac{2}{x+50}+\frac{1}{x+1}} )$

Next, we need to create a common denominator for the second fraction

$\frac{2}{x+50}+\frac{1}{x+1}\\\\\frac{2}{x+50}*\frac{x+1}{x+1} +\frac{1}{x+1}*\frac{x+50}{x+50} \\\\\frac{2x+2}{(x+1)(x+50)} + \frac{x+50}{(x+1)(x+50)}\\\\ \frac{3x+52}{(x+1)(x+50)}$

Now to return this portion to the denominator of the second fraction.

$\frac{1}{(x+1)(x+50)} *(\frac{1}{\frac{3x+52}{(x+1)(x+50)} } )$

Dividing by a fraction is the same as multiplying as the reciprocal of the fraction, so the second fraction becomes

$\frac{1}{(x+1)(x+50)} *\frac{(x+1)(x+50)}{3x+52}$

Now to reduce this expression by canceling out $(x+1)(x+5)$

$\frac{(x+1)(x+50)}{(x+1)(x+50)(3x+52)}\\\\\frac{1}{3x+52}$

3 0

3 years ago

If the average daily balance is $294.45 and the finance charge is $5.57 for the month of March, what is the annual interest rate

Fynjy0 [20]

Answer:

6.00 294.00

Step-by-step explanation:

4 0

3 years ago

Which statement is not supported by the information in the table?

Kitty [74]

A. More than one half of Maria's monthly income is spent on rent

Reason being her income is 2,000. Her rent is only 900, which is less than half of 2,000, which is 1,000.

7 0

4 years ago

In the United States, 36 percent of the people have a blood type that is A positive. From a random sample of 150 people from Nor

djverab [1.8K]

Answer:

The standard deviation used in the test statistic is 0.04.

Step-by-step explanation:

A single proportion z-test can be used to determine whether the proportion of people in Norway with a blood type of A positive is different from that in the United States.

The proportion of people in Norway with a blood type of A positive is 36% or 0.36.

The hypothesis can be defined as:

H₀: The proportion of people in Norway with a blood type of A positive is 36%, i.e. p = 0.36.

Hₐ: The proportion of people in Norway with a blood type of A positive is different from 36%, i.e. p ≠ 0.36.

The test statistic is:

$z=\frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n}}}$