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Scorpion4ik [409]
3 years ago
6

anonymous 2 years ago If you were to solve the following system by substitution, what would be the best variable to solve for an

d from what equation? 2x+6y=9 3x-12y=15 A.y, in the second equation B.x, in the first equation C.y, in the first equation D.x, in the second equation Calculus1
Mathematics
1 answer:
Ainat [17]3 years ago
7 0
I'm sorry that I'm not in calculus, but hopefully I can help.
Personally, I would choose: D.) x; in the second equation ;
because it has easier numbers to figure out, you'll get it eventually...
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In April 1986, a flawed reactor design played a part in the Chernobyl nuclear meltdown. Approximately 14252 becqurels (Bas), uni
DaniilM [7]

Answer:

A. Yes, because by 2206, the radioactive element remaining in the area is less than 800 Bqs.

Step-by-step explanation:

Function for the amount of radioactivity:

The function for the amount of radioactivity, in t years after 1996, is given by:

f(t) = 14252(0.5)^{\frac{t}{32}}

Find f(220) to determine the amount of becqurels in 2206.

f(220) = 14252(0.5)^{\frac{220}{32}} = 121.42

121.42 < 600, so the area will be safe, and the correct answer is given by option A.

8 0
3 years ago
Solve using elimination 2x-y=-22 and -7x+y=67 <br> (9,4)<br> (-9,-4)<br> (-4,9)<br> (-9,4)
suter [353]

Answer: (-9,4)

Step-by-step explanation:

2x-y=-22

-7x+y=67

-5x=45

x=-9

2(-9)-y=-22

-18-y=-22

-y=-4

y=4

8 0
3 years ago
A gardener is planting two types of trees. Type A is three feet tall and grows at a rate of of 15 inches or year. Type B is four
Lady bird [3.3K]
In between the first year
5 0
3 years ago
WILL GIVE A BRAINLIEST PLEASE HELP!!
skelet666 [1.2K]
A= l*w
168= 14*w

Divide both sides by 14
168/14= 14w/14
12=w

Final answer: 12 ft (I'm not sure if you meant to switch the order of b and c).
7 0
3 years ago
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What are shaped that can classify with these
ella [17]

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Step-by-step explanation:

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