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erastova [34]
3 years ago
9

HELPPP PLEASE. I need to know this by 9:30.

Mathematics
2 answers:
galina1969 [7]3 years ago
8 0

Answer:

23/4

Step-by-step explanation:

4*5 = 20

20+3=23

keep denominator

23/4

Aleks [24]3 years ago
6 0

Answer:

23/4

Step-by-step explanation:

5\frac{3}{4} = 5*4 + 3 / 4

= 23/4

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Please help I still do not understand these questions
solniwko [45]

Answer:

m = 2/5

Step-by-step explanation:

easy

4 0
2 years ago
What property is shown in this equation? (2 X 1/2) + 8 = 1+8
Julli [10]
The property shown in the following equation is 9 beacause simply we know 9=1 +8 so its easy
5 0
2 years ago
F (x) = |x + 3| -1 . Find the average rate of change from x = -6 to x = 8
Elenna [48]
Average rate of change is (f(8) - f(-6))/(8 - (-6)) = ((<span>|8 + 3| -1) - (</span><span>|-6 + 3| -1))/(8 + 6) = ((</span><span>|11| -1) - (</span><span>|-3| -1))/14 = ((11 - 1) - (3 - 1))/14 = (10 - 2)/14 = 8/14 = 4/7</span>
3 0
2 years ago
A 46 gram sample of a substance that is used to sterilize surgical instruments has a k-value of 0.1374. Find the substance's hal
mars1129 [50]

Answer:

  t=5.0days

Step-by-step explanation:

Using the formula for the exponential decay that is N=N_{0}e^{-kt}, we have N=\frac{1}{2}{\times}46=23, N_{0}=46 and k=0.1374.

Thus, N=N_{0}e^{-kt} becomes

23=46{\times}e^{-0.1374t}

\frac{23}{46}=e^{-0.1374t}

\frac{1}{2}=e^{-0.1374t}

Taking log on both sides, we get

ln(\frac{1}{2})={-0.1374t}

t=\frac{ln\frac{1}{2}}{-0.1}

t=\frac{-0.6931}{-0.1374}

t=5.0days

4 0
2 years ago
What is the vertex of f(x)=-x^2-8x
frez [133]

\bf f(x) = -x^2-8x\implies f(x) = -x^2-8x+0 \\\\[-0.35em] ~\dotfill\\\\ \textit{vertex of a vertical parabola, using coefficients} \\\\ f(x)=\stackrel{\stackrel{a}{\downarrow }}{-1}x^2\stackrel{\stackrel{b}{\downarrow }}{-8}x\stackrel{\stackrel{c}{\downarrow }}{+0} \qquad \qquad \left(-\cfrac{ b}{2 a}~~~~ ,~~~~ c-\cfrac{ b^2}{4 a}\right) \\\\\\ \left(-\cfrac{-8}{2(-1)}~~,~~0-\cfrac{(-8)^2}{4(-1)} \right)\implies \left( -4~~,~~0+\cfrac{64}{4} \right)\implies (-4~,~16)

7 0
3 years ago
Read 2 more answers
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