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Dmitrij [34]
3 years ago
13

How many different elements are involved in the chemical reaction shown? *

Mathematics
1 answer:
dusya [7]3 years ago
8 0
The elements you can see in the reaction are Calcium(Ca), Hydrogen(H), and Oxygen(O). So there are 3 elements in the chemical reaction.
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On Saturday morning Briana and her friends walked 1.35 miles. What is the distance as a decimal
padilas [110]

Answer:

1.35 miles is the distance walked in decimal form

Step-by-step explanation:

1 (decimal) 35

3 0
2 years ago
Help which one is right?
ladessa [460]
Hope this helps! If it does please rate it the brainliest answer!

7 0
2 years ago
Read 2 more answers
Solve 2x2+x-6 = 0<br> O (-3/2, 2)<br> OD<br> O (-2, 3/2)
irina [24]

<em>✨</em> <em>Using factorisation method</em> <em>✨</em>

‌

\begin{cases}\tt \Large  \orange\rightarrow \: \: 2 {x}^{2}  \:  +  \: x \:  -  \: 6 \:  =  \: 0 \\  \\\tt \Large  \orange\rightarrow \: \:2 {x}^{2}  \:  +  \: 4x \:  -  \: 3x \:  -  \: 6 \:  =  \: 0 \\  \\ \tt \Large  \orange\rightarrow \: \:2x(x + 2) \:  - 3(x + 2) \:  =  \: 0 \\  \\ \tt \Large  \orange\rightarrow \: \:(2x - 3) \quad \: (x + 2) \:  =  \: 0 \\  \\ \tt \Large  \orange\rightarrow \: \:(2x - 3)  = 0 \quad \: (x + 2) = 0 \\  \\ \tt \Large  \orange\rightarrow \: \:2x \:  =  \: 3  \quad;\quad \: x \:  =  \:  - 2 \\  \\ \rm \Large  \orange\rightarrow \: \:x \:  =  \:  \frac{3}{2}  \quad ;\quad \: x \:  =  \:  - 2 \\  \end{cases}

Hence , option d is the correct answer

6 0
3 years ago
Can someone help me with this?
Roman55 [17]

Answer:

Step-by-step explanation:

We first need to figure out how much money Jackie has since Pilar has the same amount of money, but in different coins. Jackie has 24 dimes and 13 quarters, so the amount of money is $2.40 + $3.25 = $5.65; therefore, Pilar has $5.65 also. In order to determine how many nickels and quarters Pilar has, we have to have a system of equations. It's up to us to write the equations we need to solve this. The first equation has to do with the NUMBER of coins Pilar has, the second has to do with the VALUE of each coin. We know that Pilar has only nickels and quarters and that she has a total of 53 coins. So the NUMBER equation is

n + q = 53

The VALUE equation relates how much each coin is worth to the total amount of money it equals:

.05n + .25q = 5.65.

Go back to the first equation and solve it for either n or q. I solved it for n:

n = 53 - q

Plug this into the second equation in place of n now to get:

.05(53 - q) + .25q = 5.65 and

2.65- .05q + .25q = 5.65 and

.20q = 3 so

q = 15. This means that there are 15 quarters. If there are 15 quarters, then there are

n + 15 = 53 nickels and

n = 38 nickels.

7 0
3 years ago
Forty-two divided by seven plus the quantity three divided by six
ikadub [295]

Answer:

i think its 6.5

Step-by-step explanation:

42/7 = 6

3/6 = 0.5

6+0.5=6.5

6 0
3 years ago
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