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vazorg [7]
3 years ago
13

(5.42x10^2)—(2.1x10^-1) simplify and solve in scientific notation and please show work

Mathematics
1 answer:
stich3 [128]3 years ago
5 0

542÷100×100-(21÷10)÷10

=542-0.21=541.79=5.4179×10²

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Mrs.Davis bought 6 pounds of grapes for 18 dallors at this rate how much would 72 ounces of grapes have cost
harkovskaia [24]

Answer:

Cost of 72 ounces of grapes is $13.5


Step-by-step explanation:

In order to solve his problem, we first need to get all the values in the same units.

  1 pound = 16 ounces

∴ 6 pounds= 16×6 = 96 ounces

Now by unitary method, we solve the question as follows:

price of 96 ounces of grapes = $ 18

price of 1 ounce of grapes = $ (18÷96)

∴ price of 72 ounces of grapes = $ [(18÷96)×72]

= (0.1875×72) =  $ 13.5

4 0
3 years ago
This may prove to be somewhat tricky.) Suppose that we have 10 coins, which are weighted so thatwhen flipped theith coin shows h
timama [110]

Answer:

2/10

Step-by-step explanation:

Probability of getting head on i'th coin = i/10

Probability Pr of getting head on 2nd coin (Event A) = 2 / 10

Probability Pr of getting head on 1st coin (Event B) = 1/10

Probability A given B = Pr (A/B) = Pr (A∩B) / Pr B ;

where A∩B = Pr (A & B) = Pr A X Pr B

Putting in above formula :

Pr (A/B) = <u>[(</u>1/10)x(2/10<u>)]</u>  / 1/10

= 2/10

4 0
3 years ago
Help me ASAP! 20 POINTS TO THE ONE WHO ANSWERS CORRECTLY!
Marrrta [24]
Blue triangle:  perimeter is 4x+2+7x+7+5x-4, or, after simplification, 
                                           16x + 5
Red triangle:  perim. is 2x-5+x+7+x+3 (and so on).

8 0
3 years ago
Please answer these questions
maria [59]

Answer: I don’t know the answer to it but I will try and if I got it will tell u

Step-by-step explanation:

8 0
2 years ago
The question is below:​
Sonja [21]

Answer:

x = 19.5, RQS=43

Step-by-step explanation:

It is important to note that RQS and TQS are supplementary, meaning their angles will add up to 180. Knowing this, we can create and solve the equation to find x..

(2x+4) + (6x+20) = 180

8x + 24 = 180

8x = 156

x = 19.5

Now that we know the value of x, we can substitute it into the equation for RQS, 2x+4.

2(19.5)+4

39+4

43

Hope this helped!

4 0
2 years ago
Read 2 more answers
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