3 years ago

Help me plzz with 18-22 thanks

Mathematics

1 answer:

KonstantinChe [14]3 years ago

5 0

-4 your welcome ❤️❤️ndjdkdkdjfnf

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please help 50 points!!!! answer 1-5 please if you can show how you got the answer if you cant its ok at least show how you got

kvasek [131]

Answer:

Step-by-step explanation:

1. D

2. B

3. C

4. C

5. C

Thanks for letting me know.

;)

4 0

2 years ago

Read 2 more answers

2. Dilute hydrochloric acid reacts with zinc to form zinc chloride and hydrogen.

DIA [1.3K]

Step-by-step explanation:

Zn + 2HCl => ZnCl2 + H2

Moles of Zn = 13g / (65.38g/mol) = 0.198mol

Volume of HCl = 0.396mol / (0.25mol/dm³) = 1.58dm³.

Volume of H2 = 0.198mol * (22.4dm³/mol) = 4.43dm³.

6 0

3 years ago

What is the value of×

sweet [91]

Is there supposed to be a picture??

But to answer ur question when ur referring to x your referring to 1 hope this helps

6 0

3 years ago

The value of the definite integral / 212x – sin(x) dx / 122x-sin(x) is

blondinia [14]

Hi there!

$\boxed{= 70 + cos(12) - cos(2) \approx 71.26}$

$\int\limits^{12}_{2} {x-sin(x)} \, dx$

We can evaluate using the power rule and trig rules:

$\int x^n = \frac{x^{n+1}}{n+1}$

$\int x = \frac{1}{2}x^{2}$

$\int -sin(x) = cos(x)$

Therefore:

$\int\limits^{12}_{2} {x-sin(x)} \, dx = [\frac{1}{2}x^{2}+cos(x)]_{2}^{12}$

Evaluate:

$(\frac{1}{2}(12^{2})+cos(12)) - (\frac{1}{2}(2^2)+cos(2))\\= (72 + cos(12)) - (2 + cos(2))\\\\= 70 + cos(12) - cos(2) \approx 71.26$

3 0

2 years ago

17. Mary Palm's checking account had a starting balance of $785.63. She wrote a check for $57.00 for groceries and a check for $

Scrat [10]

Answer:B 660.88

Step-by-step explanation:

First, 785.63-57=728.63

Then 728.63 - 125=603.63

Last add 603.63 to 125.00

To give 660.88

4 0

2 years ago