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3 years ago

How do i solve 4/a-2/b+1/4?

Mathematics

1 answer:

Pepsi [2]3 years ago

7 0

This is as simplified as it gets since there are none of the same variables.

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Caroline resting heart is 52 beats per minute (bpm). When she starts running her heart rate increases 1.25% each second until it

horsena [70]

Answer:74.55 beat per minute

Step-by-step explanation:

Given

Heart beat is 52 beat per minute

i.e. $B=\frac{52}{60}$ beat per sec

If heart rate is increases 1.25 % each sec

suppose B is the heart beat at first second therefore heat beat at 2 nd second

$B_2=B+1.25 \% B$

$B_2=B(1+1.25 \% )$

For 3 rd sec

$B_3=B(1+1.25\%)+1.25\%B(1+1.25\%)$

$B_3=B(1+1.25\%)^2$

similarly for 3 sec

$B_{30}=B(1+1.25\%)^{29}$

$B_{30}=1.433B$

$B_{30}=1.242\ \text{beat per second }$

$B_{30}=74.55\ \text{beat per minute}$

4 0

3 years ago

-7 - x = 3 <img src="https://tex.z-dn.net/?f=%20-%207%20-%20x%20%3D%208" id="TexFormula1" title=" - 7 - x = 8" alt=" - 7 - x

yaroslaw [1]

$-7-x= 3 \\ \\ -x= 3+7\quad \to -x= 10\to \boxed{x=10} \\ \\ \\ -7-x= 8 \\ \\ -x= 8+7\quad -x= 15\to \boxed{x= -15}$

4 0

3 years ago

For what value of x is PQ || BC? A 5 B. 6 C. 7 D. 8

Dahasolnce [82]

Answer:

C. 7

Step-by-step explanation:

$In\: \triangle ABC\\\overline{PQ} \parallel \overline {BC}.. (given) \\$

Therefore, by Basic Proportionality theorem:

$\frac{AP}{PB} = \frac{AQ}{QC} \\\\\therefore \frac{x}{x+7} = \frac{x-3}{x+1} \\\\ \therefore \: \frac{x - x - 7}{x + 7} = \frac{x - 3 - x - 1}{x + 1} \\ (by \: dividendo) \\ \\ \frac{ - 7}{x + 7} = \frac{ - 4}{x + 1} \\ \\ \frac{7}{x + 7} = \frac{4}{x + 1} \\ \\ 7x + 7 = 4x + 28 \\ \\ 7x - 4x = 28 - 7 \\ \\ 3x = 21 \\ \\ x = \frac{21}{3} \\ \\ \huge \red{ \boxed{ x = 7}}$

5 0

3 years ago

Boris Heban is single and pays into an HMO. The total cost is $8,190 annually, and the employer pays 90 percent of the total cos

adell [148]

So Boris has to pay:
10% * 8190 = 819
50% * 662 = 331
50% * 188 = 94

so in total he pays: 819 + 331 + 94 = 1244

deducted each week is (52 weeks in a year):
1244/52 = 23.92

so each week $23.92 are deducted from his paycheck

8 0

3 years ago

I’m timed !!! Please help

Doss [256]

1,450 because you would plug 75 in for x
f(x)= 20(75)-50

4 0

3 years ago