9,000,000,000 + 3,000,000 +800,000 +40,000 + 100 + 60 +5
Subtract 7.50 - 4.00 and dived that answer by 10
Answer:
Katrina got 86 in her test
Step-by-step explanation:
given
mean = 80
standard deviation = 3
z-score = 2
Let score of Katrina = x
Recall z-score is calculated by
z-score = (x-mean) / standard deviation
substitute values and solve for x
2 = (x-80)/3
x-80=6
x = 86
Okay, let's work this out.
<span><span><span>3x</span>+70</span>−<span>7x</span></span><span>=<span><span><span><span>3x</span>+70</span>+</span>−<span>7x
</span></span></span>Combine Like Terms:<span>=<span><span><span>3x</span>+70</span>+<span>−<span>7x</span></span></span></span><span>=<span><span>(<span><span>3x</span>+<span>−<span>7x</span></span></span>)</span>+<span>(70)</span></span></span><span>
=<span><span>−<span>4x</span></span>+<span>70
Answer -4x+70
I really don't understand what you mean by this, perhaps you wrote the question wrong, but it would be great than 18.
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