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aleksandrvk [35]

3 years ago

10

In a certain chemical, the ratio of zinc to copper is 4 to 19. A jar of the chemical contains 646 grams of copper. How many gram

s of zinc does it contain?

1 answer:

klasskru [66]3 years ago

5 0

Chemical and enlargement of reduction in okay 12

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What is the volume of a rectangular prism with a length of 8 1/2 cm, width of 9 1/3 cm and a height of 12 2/5 cm?

AlekseyPX

I believe it is 864, I'm not 100% sure. But I think it is.

8 0

3 years ago

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may someone help me ASAP? I am solving polynomial equations and I don't know how to do it, here is the equation... x^4+11x^2=3x^

koban [17]

<u>Answer:</u>

$x=2\sqrt{2}$ , $x=-2\sqrt{2}$ , $x=4i$ , $x=-4i$

<u>Step-by-step explanation:</u>

$x^4+11x^2=3x^2+128$

First, we subtract 128 from both sides:

$x^4+11x^2-128=3x^2$

Then, we subtract $3x^2$ from both sides:

$x^4+8x^2-128=0$

Rewrite the equation:

$u^2+8u-128=0$

Insert and solve:

$u^2+8u-128=0\\u=8,u=-16\\x^2=8:x=2\sqrt{2},x= -2\sqrt{2} \\x^2=-16:x=4i,x=-4i$

<em>Please give Brainliest</em>

8 0

3 years ago

Three cards are dealt from a shuffled standard deck of playing cards. Find the probability that the first card dealt is red, the

harina [27]

There are 52 cards in a deck, half the cards aware red and half the cards are red.

First card being red is 26/52 = 1/2

After the first card is dealt there are 51 cards left and 26 are black so dealing a black card = 26/51

After 2 cards are dealt there are 50 cards left and 25 red ones left. The probability would be 25/50 = 1/2

The probability of all 3 happening = 1/2 x 26/51 x 1/2 = 13/102

Answer: 13/102

3 0

2 years ago

What number is in between 375 and 400?

Georgia [21]

376,377,378,379,380,381,382,383,384,385,386,387,388,389,390,391,392,393,394,395,396,397,398,399,400
just kidding its 396.5
hope this helped

7 0

3 years ago

N the inequality -x > 5, what must you do to solve the problem?

mash [69]

Answer:

You divide by - 1

Step-by-step explanation:

-x divided by - 1 is x

5 divided by - 1 is - 5

x > - 5

5 0

3 years ago

Read 2 more answers