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solong [7]
3 years ago
7

I need help with question one & two

Mathematics
1 answer:
Zolol [24]3 years ago
6 0
The atomic number above the element is the number of protons inside of it.
That’s number 1 so answer is 169.
Number 2 is H because in the description above it states it is highly reactive
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Please help
Harrizon [31]

Answer:

(-1/2, 3/4)

Step-by-step explanation:

Let's use the elimination by adding or subtracting method.  Note that we have 8y in the first equation, and that we could obtain -8y in the second equation by multiplying the second equation by 2:

2(24x - 4y = -15) => 48x - 8y = -30

Now combine this result (this equation) with the first equation:

  2x + 8y = 5

+48x   -8y = -30

---------------------

 50x    =     - 25

Dividing both sides by 50, to isolate x, we get

x = -25/50 = -1/2.

Now substitute -1/2 for x in the first equation and solve the resulting equation for y:

  2x + 8y = 5

2(-1/2) + 8y = 5, or -1 + 8y = 5, or 8y = 6 (after having added 1 to both sides)

Dividing both sides of 8y = 6 by 8 leads to determining the value of y:

y = 6/8 = 3/4

The solution is (-1/2, 3/4).

3 0
3 years ago
Can someone help me ?
Leni [432]

Answer:

d

Step-by-step explanation:

if she connects it to any other point angle would be more the 30 degree

6 0
3 years ago
Read 2 more answers
The difference of twice a number k and 8 is 12
laiz [17]

Answer:

k = 10

Step-by-step explanation:

Difference means subtract.

2k - 8 = 12

is how that statement is translated.

Add 8 to both sides.

2k - 8 + 8 = 12 + 8

2k = 20                    

Divide by 2

2k/2 = 20/2

k = 10

6 0
3 years ago
25 POINTS!!!!!!
8_murik_8 [283]
Your anwer is C)<span>f(x) = 467(5 to the one fourth power)4x</span>
7 0
2 years ago
Read 2 more answers
What value of x will make △ONM similar to △SRQ by the SAS similarity theorem?
Lerok [7]

Answer:

c 25

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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