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svetoff [14.1K]
3 years ago
8

what will come in the following series 20 25 23 28 26 31 29 34 _? answer is 31. please explain how?? urgent pls​

Mathematics
1 answer:
Assoli18 [71]3 years ago
7 0

The series of numbers is adding 5 and then subtracting 2

20+5=25

25-2=23

23+5=28

28-2=26

and so on. Do you understand?

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Which fraction and decimals in order from least to greatest <br> -2.3<br> -2 4/5<br> -2.6
7nadin3 [17]
-2.8, -2.6, -2.3

Hope this helped :)
6 0
2 years ago
The equation h = -16t 2+ 53x + 8 gives the height h, in feet, of a football as a function of time t, in seconds, after it is kic
Elanso [62]

Answer: The maximum height the football reaches = 51.89 feet.

Step-by-step explanation:

Given: The equation h = -16t^2+ 53t + 8 gives the height h, in feet, of a football as a function of time t, in seconds, after it is kicked.

Differentiate the given equation, we get

h'=-(2)16t+53=-32t+53   (i)

Put h'=0

\Rightarrow\ -32t+53=0\\\\\Rightarrow\ t=\dfrac{53}{32}\approx1.65625

Differentiate (i) w.r.t. t, we get

h''=-32 < 0  i.e. h is maximum at t= 1.65625

The value of h at t= 1.65625 will be -16(1.65625)^2+53(1.65625)+8=51.890625\approx51.89\text{ feet}

Hence, the maximum height the football reaches = 51.89 feet.

8 0
3 years ago
น. <br><img src="https://tex.z-dn.net/?f=x%20%3D%201%20-%20%20%5Csqrt%7B2%7D%20find%20%20%5C%3A%28x%20-%20%20%5Cfrac%7B1%7D%7Bx%
Nastasia [14]

Answer:

Step-by-step explanation:

\frac{1}{x}=\frac{1}{1-\sqrt{2}}\\\\=\frac{1*(1+\sqrt{2})}{(1-\sqrt{2})(1+\sqrt{2})}\\\\=\frac{1+\sqrt{2}}{1^{2}-(\sqrt{2})}\\\\=\frac{1+\sqrt{2}}{1-2}\\\\=\frac{1+\sqrt{2}}{-1}\\\\= -[1+\sqrt{2}]\\\\x-\frac{1}{x}=1-\sqrt{2}-(-[1+\sqrt{2}])\\\\=1-\sqrt{2}+1+\sqrt{2}\\\\=2

8 0
2 years ago
60% of the students in class are girls. If there are 15 girls, how many students are in class?
Vlada [557]
25

If 15 is 60% of a number, it is 3/5 of the whole. Since 5 goes into 25 5 times, and 5 goes into 15 3 times, 15 is the 3/5 of 25.
4 0
2 years ago
You have 550$ in a savings account that earns 3% simple interest each year.How much will be in your account in 10 years?
Tomtit [17]
Hey there! Hope I can help!

<span><span>P is the principal amount, $550.00.
</span><span>R is the interest rate, 3% per year, or in decimal form, 3/100 = 0.03.
</span><span>T is the time involved, 10 year(s) time period.
</span><span>So, t is the 10 year time period.

</span></span><span>To find the simple interest, we multiply 550 × 0.03 × 10 to get $165.00
</span>
<span>Then the interest is added onto the principal to figure the new amount after 10 years. </span>
<span>550.00 + 165.00 = 715.00 > $715.00 after 10 years.</span><span>

Hope this helps!

</span>
7 0
3 years ago
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