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Elis [28]
2 years ago
10

Evaluate cos-1(0.4283). Round to 1 decimal place.

Mathematics
1 answer:
attashe74 [19]2 years ago
6 0

Answer

0.4283

Step-by-step explanation:

Multiply

0.4283

by

1

.

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Please help me with my Algebra question.
viva [34]
54 = x + (x+6) + x + (x+6)
54 = 4x +12
42 = 4x
10.5 = x

The two shorter sides (x) are 10.5 cm, the two longer sides are (10.5+6, that is 6 cm longer) 16.5 cm. 10.5 + 10.5 + 16.5 + 16.5 = 54 cm.
4 0
3 years ago
What is the volume of this sphere
ruslelena [56]

Answer:

3052.08 m³

Step-by-step explanation:

\boxed{volume \: of \: sphere =  \frac{4}{3}\pi {r}^{3}  }

Given that the radius is 9m, r=9.

Volume of sphere

=  \frac{4}{3} (3.14)(9^{3} )

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3 years ago
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If (ax+2)(bx+7)=15x2+cx+14 for all values of x, and a+b=8, what are the 2 possible values fo c
dolphi86 [110]

Given:

(ax+2)(bx+7)=15x^2+cx+14

And

a+b=8

Required:

To find the two possible values of c.

Explanation:

Consider

\begin{gathered} (ax+2)(bx+7)=15x^2+cx+14 \\ abx^2+7ax+2bx+14=15x^2+cx+14 \end{gathered}

So

\begin{gathered} ab=15-----(1) \\ 7a+2b=c \end{gathered}

And also given

a+b=8---(2)

Now from (1) and (2), we get

\begin{gathered} a+\frac{15}{a}=8 \\  \\ a^2+15=8a \\  \\ a^2-8a+15=0 \end{gathered}a=3,5

Now put a in (1) we get

\begin{gathered} (3)b=15 \\ b=\frac{15}{3} \\ b=5 \\ OR \\ b=\frac{15}{5} \\ b=3 \end{gathered}

We can interpret that either of a or b are equal to 3 or 5.

When a=3 and b=5, we have

\begin{gathered} c=7(3)+2(5) \\ =21+10 \\ =31 \end{gathered}

When a=5 and b=3, we have

\begin{gathered} c=7(5)+2(3) \\ =35+6 \\ =41 \end{gathered}

Final Answer:

The option D is correct.

31 and 41

8 0
1 year ago
Can u help solve this problem
Digiron [165]

Answer:

45in³

Step-by-step explanation:

6 x 5 x 3 = 90/2 = 45in³

4 0
3 years ago
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Solve 2sinx^2-5sinx-3=0
vodomira [7]

Answer:

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Step-by-step explanation:

The answer my Math 4 teacher gave me. :) work with it

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