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Brrunno [24]
2 years ago
10

The ratio of hydrogen to oxygen in a plant sample is 18:12. The sample has 42 units of oxygen.

Mathematics
1 answer:
larisa86 [58]2 years ago
3 0

Answer:63

Step-by-step explanation: H:0=18:12=1.5:1

1.5:1=63:42

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The perimeter of a rectangular metal plate is 15 cm. Find the length of the rectangular plate (in decimals) whose width is 228 c
scoray [572]

The Solution.

Representing the problem in a diagram, we have

By formula,

P=2(L+W)

In this case,

P=15\operatorname{cm},L=?,W=\frac{22}{8}cm

Substituting these values in the formula above, we get

15=2(L+\frac{22}{8})

Clearing the bracket, we get

15=2L+(2\times\frac{22}{8})\begin{gathered} 15=2L+\frac{11}{2} \\  \\ 15=2L+5.5 \end{gathered}\begin{gathered} 15-5.5=2L \\ 9.5=2L \end{gathered}

Dividing both sides by 2, we get

L=\frac{9.5}{2}=4.75\approx4.8\operatorname{cm}

Therefore, the correct answer is option C.

6 0
1 year ago
Alexis and tara both mine salt. alexis mines 300 pounds in 20 hours. tara mines 400 pounds in 40 hours. which of the following i
Archy [21]
Well, if both Alexis and Tara mine salt for 40 hours... they'd have mine 1,000 pounds of salt. Is this what you were looking for?
7 0
3 years ago
Which ordered pairs (x,y) are solutions to the linear equation 2x+3y=6
Nuetrik [128]

Answer:

I think it is 0,2

Step-by-step explanation:

Because you need to substitute the ordered pairs into the linear equation:

so,

2(0)+3(2) = 6

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The two side, so equation are identical, so the correct answer is (0,2).

I hope this helps!

8 0
3 years ago
Read 2 more answers
The sum of two numbers is 21. The larger number is 6 less than twice the smaller number. Find the two numbers.
Vesnalui [34]
Hey there! :D

21= 2x-6+x

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27=3x

x=9

The smaller number is 9. 

The larger number is:

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The larger number is 12. 

I hope this helps!
~kaikers
3 0
3 years ago
What is the equation in point slope form of a line that passes through the point (−8, 2) and has a slope of 12 ? Drag a number,
NemiM [27]
Point-slope form:

y − b = m(x − a<span>), where m is the slope and (a, b) is a point on the graph.

Here that would look like:

y - 2 = 12(x - (-8))
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The answer:
</span>y - 2 = 12(x + 8)

Hope this helps.
5 0
3 years ago
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