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Lynna [10]
3 years ago
14

23) —2n- (9 - 10n)

Mathematics
1 answer:
xz_007 [3.2K]3 years ago
4 0

Answer:

23. 8n - 9

24. 55 - 45n

25. 69a - 10

26. -30m + 33

27. -4 + 96x

28. -8n + 26

29. -25b - 20

30. -71n - 9

Step-by-step explanation:

23. -2n - 9 + 10n

Collect like terms

= 8n - 9

24. 10 - 45n + 45

Collect like terms

= 55 - 45n

25. 9a + 60a - 10

Collect like terms

= 69a - 10

26. -54m + 27 + 6 + 24m

Collect like terms

= -30m + 33

27. -10 + 90x + 6x - 60

Collect like terms

= -4 + 96x

28. -10n + 20 + 2n + 6

Collect like terms

= -8n + 26

29. -30b - 30 + 5b + 10

Collect like terms

= -25b - 20

30. -7n - 21 - 8 - 64n

Collect like terms

= -71n - 9

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So it takes him 3 hours to reach a distance of 195 miles. Divide that by 3 and we get 65 miles per hour. So we get the equation of 65h=195+455.
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4 years ago
Does this graph represents a function? Why or why not?
love history [14]

Answer:

B. Yes, because it passes the vertical line test.

Step-by-step explanation:

B. Yes, because it passes the vertical line test.

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6 0
3 years ago
Calculate the l4 approximation for f(x) = cos2(x) on 8 , 2 . (round your answer to four decimal places.) l4 =
BaLLatris [955]

The solution for l4  is  mathematically given as

L_{4}=0.5431

<h3>What is the solution for l4?</h3>

&\text { Given } f(x)=a \cos ^{2}(x) \quad\left[\frac{\pi}{8}, \frac{\pi}{2}\right] \text { \& } n=4\\\\&\Delta a=\frac{b-a}{n}=\frac{\pi / 2-\pi / 8}{9}=\frac{3 \pi}{32}\\\\&x_{0}=\pi / 8, x_{1}=\frac{\pi}{8}+\frac{3 \pi}{32}=\frac{7 \pi}{32}\\\\&x_{2}=\frac{5 \pi}{16}, \quad x_{3}=\frac{13 \pi}{32}, x_{4}=\pi / 2\\\\&f\left(x_{0}\right)=f(1 / 8)=0.8535\\

&f\left(x_{1}\right)=f\left(\frac{7 \pi}{32}\right)=0.5975\\\\\&f\left(x_{2}\right)=f\left(\frac{5 \pi}{16}\right)=0.3086\\\\\&f\left(a_{3}\right)=f\left(\frac{13 \pi}{32}\right)=0.0842\\\\\&L_{4}=\sum_{k_{0}^{=0}}^{3} f\left(x_{k}\right) \Delta x\\\\&=\Delta \\\\x\left[f\left(x_{0}\right)+f\left(x_{1}\right)+f\left(x_{2}\right)+f\left(x_{3}\right)\right]\\\\\&=\frac{3 \pi}{32}[0.8535+0.5975+0.3056+0.0842]\\\\&L_{4}=0.5431

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3 0
2 years ago
A prism has a right triangle as its base.
gavmur [86]

Answer:

168 cm³

Step-by-step explanation:

The base of the prism is a right triangle whose hypotenuse is 10 cm and one other side is 6 cm.

So, the third side of the triangle = \sqrt{10^{2}-6^{2}  }=8 cm.

{Since we have applied the Pythagoras theorem.}

Hence, the area of the base triangle is \frac{1}{2} \times 8 \times 6 = 24cm².

Therefore, the volume of the prism is = 24\times 7=168 cm³ {Since volume of a prism is given by ( Area of the base triangle ) × ( Height of the prism )}

(Answer)

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4 years ago
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