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sesenic [268]
3 years ago
15

Help ASAP ! Please !!!

Mathematics
1 answer:
victus00 [196]3 years ago
6 0

Answer:

Step-by-step explanation:

Volume = 4/3πr³

= 4/3*22/7*7*7*7

= 4*22*7*7*7/3*7

=4*22*7*7/3= 4312/3

= 1437.3 cm³

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Solve the equation. √1 - 2b = 1 + b<br> 1. 0 and 4<br> 2. -2 only<br> 3. 0 only<br> 4. 0 and -2
slava [35]
\sqrt{1-2b} = 1 + b \\ \\ 1 - 2b = (1 + b)^2 \\ \\ 1 - 2b = 1 + 2b + b^2 \\ \\ -2b = 2b + b^2 \\ \\ 2b + 2b + b^2 = 0 \\ \\ 4b + b^2 = 0 \\ \\ b(4 + b) = 0 \\ \\ b = 0, -4 \\ \\ b = -4 \ is \ false \\ \\ b = 0

The final result is, C) 0 only.

We gathered the solutions of b = 0, -4.
b = -4 was not true so we had to remove it from the solution set, and we are left with b = 0 now. You can check this answer by substituting 0 in for b in the original equation. You should get 1 = 1, which is the correct answer.
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3 years ago
Find the slope in (-2,8) and (1,6)
Salsk061 [2.6K]

Formula for slope: \frac{y2 - y1}{x2 - x1}

y₂: 6

y₁: 8

x₂: 1

x₁: -2

Plug them into the slope equation:

\frac{6 - 8}{1 - (-2)}

--> \frac{-2}{1 + 2}

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The slope is -\frac{2}{3}.

8 0
3 years ago
Read 2 more answers
Mr. Kiernan decides to purchase a new West Virginia flag for his room that is double
Alla [95]

Answer:

$50.16

Step-by-step explanation:

There is a sale tax on the item to be purchased, and the tax is 4.5% of the amount of the flag i.e 4.5% × $48.00 = $2.16

After the rate of the sale tax has been changed to dollars, we then add the amount of the sales to the amount of the flag to give the total amount to be paid i.e $2.16 + $48.00 = $50.16

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4 0
3 years ago
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The ages of Hari and Harry are in the ratio 5:7. Four years from now the ratio of their ages will be 3:4. Find their present age
yuradex [85]

Answer:

  Hari is 20; Harry is 28

Step-by-step explanation:

The ratio in 4 years is equivalent to the ratio 6:8, which has each of the original ratio unit numbers increased by 1. That means each of those ratio units stands for 4 years, and the present ages are ...

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  Harry: 7·4 = 28

_____

<em>Conventional method of solution</em>

If you like, you can write equations for the ages of Hari (x) and Harry (y):

  x/y = 5/7

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These can be solved a variety of ways. For some methods, it may be useful to write them in standard form:

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These have solution (x, y) = (20, 28).

4 0
4 years ago
mrs Johnson gives twice as much daily homework as mr beach mr beach gives 10 minutes less than mrs Rodriquez .If mrs Rodriguez g
alekssr [168]
Answer= 110 minutes

Mrs. Rodriquez=35minutes

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Mrs. Johnson+ Mr. Beach+ Mrs Rodriquez=50+25+35=110 minutes


8 0
3 years ago
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