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koban [17]
4 years ago
14

I need to explain and answer questions #3 #4 and #5 i will give brainliest!

Mathematics
1 answer:
Sauron [17]4 years ago
8 0

Send a picture so I can get the problem

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What is the value of (5.38*10^4)(4.2*10^3) in scientific notation.
cricket20 [7]
First multiply the 5.38 and 4.2 together to get 22.596.  We will deal with it in a bit.  For the bases of 10, we will add the exponents giving us 10 to the 7th power.  So this is what we have so far:  22.596* 10^{7}.  But that decimal number has to be between 1 and 10 and it's too high so we have to move the decimal one more place to the left.  When we do that, we are adding one more power to the 10.  The final answer in scientific notation is 2.2596*10^8
6 0
3 years ago
4. When Megan solved this system using the elimination method, she added the equations together and got the equation 4y = 16. Th
Ede4ka [16]
Hi there!

So, our two equations are:
2x + 3y = 20 and
-2x + y = 4

We can see that the x's will cancel out because they're the same number, opposite signs. Then we're left with 4y = 24.

Divide 24 by 4, which is 6.

y = 6, then we plug that in to the first equation for y:
2x + 3(6) = 20
2x + 18 = 20
2x = 2
x = 1

So, she made her first mistake when adding the equations, adding 20 and 4, she somehow got 16. 

The solution to the system is (1,6).

I hope I helped!
6 0
3 years ago
Which one one of the gradient of the line shown above ?<br>look at the graph help me !!!​
solniwko [45]
I’m pretty sure it’s A:)
6 0
3 years ago
Read 2 more answers
Simplify -8/2 ÷ 6/-3<br> Answer choices:<br> A: -4<br> B: 2<br> C:-2<br> D: 4
motikmotik

Answer:

2

Step-by-step explanation:

-8/2=-4

6/-3=-2

-4/-2=2

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3 years ago
Which is the graph of f(x) = log3^x
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Answer: The graph has the answer

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4 years ago
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