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REY [17]
3 years ago
10

Evalute 20/6 - 2/3 pleASES i need help with this answer

Mathematics
2 answers:
IceJOKER [234]3 years ago
5 0

Answer:

8/3

Step-by-step explanation:

to have the same denominators, divide 20/6 by two.

10/3-2/3=8/3

hope this helps

Korolek [52]3 years ago
3 0

Answer:

8/3  or 2  2/3

Step-by-step explanation:

20/6 - 2/3

Simplify the first term by dividing by 2

10/3 - 2/3

8/3

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The sun shines at a 30° angle to the ground. To the nearest inch, how long is the shadow cast by a 72-in. tall fence post?
tensa zangetsu [6.8K]

The length of the shadow is 124.7 in

<u>Explanation:</u>

<u />

Given:

Angle, θ = 30°

Height of the fence,  h = 72 in

Length of the shadow, l = ?

Given:

tan 30° = \frac{perpendicular}{base}  = \frac{height of the fence}{length of the shadow}

\frac{1}{\sqrt{3} } = \frac{72}{l} \\\\l = 72\sqrt{3} \\\\l = 124.7 in

Therefore, the length of the shadow is 124.7 in

5 0
3 years ago
F(0) = -22 - 10x<br> Find f(-7)
miss Akunina [59]

Answer:

52

Step-by-step explanation:

-22-10(-7)

-22--70

-22+70

52

4 0
3 years ago
After this one 5 more left
babymother [125]

Answer:

16pi m^3

Step-by-step explanation:

formula for volume is pi r^2 h

4 0
3 years ago
Read 2 more answers
"Polio has a basic reproduction number (R0) = 5. The vaccine is very good; in fact, polio vaccine is 99% effective when two foll
yulyashka [42]

Answer:

0.81

Step-by-step explanation:

Herd immunity or community immunity is the immunity seen after vaccination of a population wherein the large portion of the population becomes immune to the pathogen. It depends on vaccine efficacy and vaccination rate.

The reproduction number R_o is a factor indicating the number of people that can be infected by the person with the disease. If Ro=5 then one infected person can infect 5 people with Polio virus.

V_c= q_c/E

V_c= Vaccine coverage

q_c= herd immunity threshold

E= Vaccine efficacy= 99%=0.99

q_c=1-1/R_o= 1-1/5=0.8

V_c= q_c/E

V_c= 0.8/0.99= 0.808= 0.81

Thus, 81% coverage or vaccination for Polio is required to stop spread of Polio in the population.

5 0
3 years ago
Liz earns a salary of $2,000 per month, plus a commission of 5% of her sales. She wants to earn at least $2,200 this month. Ente
solong [7]

Answer:

2000 + .05x >= 2200

Step-by-step explanation:

2000 is how much she already has

.05 is 5% of sales

x is the unknown amount of sales

2200 is how much she needs

The rate is just 5% increase.

5 0
3 years ago
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