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Ierofanga [76]
3 years ago
9

Devaughn is 13 years younger than Sydney. The sum of their ages is 79 . What is Sydney's age?

Mathematics
1 answer:
Mrrafil [7]3 years ago
4 0

Answer:

26

Step-by-step explanation:

Let D =Devaughn's age

S= Sydney's age

So D+S=64

D=S+12

Now

D+S=64⇒D=64−S

and so

S+12=64−S 2S=52

S=26

Therefore

D=S+12

D=38

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Step-by-step explanation:

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Someone please solve this​
Wittaler [7]

Step-by-step explanation:

2 x  \times  \frac{1}{4}  - 1 \times  \frac{1}{4}  - 2 \frac{1}{4}  = 1 \times  \frac{1}{4}

\frac{2}{8}  -  \frac{1}{4}  -  \frac{2}{8}  =  \frac{1}{4}

and then minus them

8 0
2 years ago
What are the approximate values of the minimum and maximum points of f(x) = x5 − 10x3 + 9x on [-3,3]? A. maximum point: (–2.4, 3
slava [35]

Answer:

(-2.4, 37.014)

Step-by-step explanation:

We are not told how to approach this problem.  

One way would be to graph f(x) = x^5 − 10x^3 + 9x on [-3,3] and then to estimate the max and min of this function on this interval visually.  A good graph done on a graphing calculator would be sufficient info for this estimation.  My graph, on my TI83 calculator, shows that the relative minimum value of f(x) on this interval is between x=2 and x=3 and is approx. -37; the relative maximum value is between x= -3 and x = -2 and is approx. +37.  

Thus, we choose Answer A as closest approx. values of the min and max points on [-3,3].  In Answer A, the max is at (-2.4, 37.014) and the min at (2.4, -37.014.

Optional:  Another approach would be to use calculus:  we'd differentiate f(x) = x^5 − 10x^3 + 9x, set the resulting derivative = to 0 and solve the resulting equation for x.  There would be four x-values, which we'd call "critical values."

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Oliga [24]

Solution :

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⇒ $0.8+T=1$

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Therefore, the value of T is 0.2

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The sum of 2 numbers us 19 and their didfference is 55 what are the two numbers
damaskus [11]
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Can you follow me and like me please? I hope i can help you more.☺
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