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3 years ago

Can someone explain this to me pls

Mathematics

1 answer:

zhuklara [117]3 years ago

7 0

That is angles I think you need to find the last one

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4(a^2+5a-6)-3(2a^3+4a-5)

Kazeer [188]

Answer: -6a exp3 + 4a exp2 + 8a - 9

Step-by-step explanation:

5 0

3 years ago

9*8+2-1????????????????????????/

Vesna [10]

9 times 8 equals 72
72 plus 2 equals 74
74 minus 1 equals 73

your answer would be 73

4 0

2 years ago

Read 2 more answers

The components of a vector are Ax = –10 units and Ay = 8 units. What angle does this vector make with the positive x axis? g

Mandarinka [93]

Answer:

This vector make an angle of 141° with the positive x axis

Step-by-step explanation:

Refer the attached figure

Components of vector :

$A_x=-10 \\A_y = 8$

We are supposed to find What angle does this vector make with the positive x axis

$tan \theta =\frac{A_y}{A_x}\\tan \theta =\frac{8}{-10}\\\theta =tan^{-1}(\frac{8}{-10})\\\theta =tan^{-1}(\frac{8}{-10})=-38.65^{\circ}$

Now ,

$\alpha = 180-38.65=141.35^{\circ}$

So, this vector make an angle of 141° with the positive x axis

7 0

3 years ago

You are making a walkway around part of a swimming pool. The dimensions of the swimming pool are 18 and 25, while the dimensions

vredina [299]

Answer:

$A = 4x^2 + 86x + 450$

Step-by-step explanation:

Given

$Walkway = x$

$Length = 18$

$Width = 25$

Required:

The area of the swimming pool

Assume the walkway will be on the 4 sides of the swimming pool.

The total length (L) of the swimming pool will be:

$L = 18 + x + x$

$L = 18 + 2x$

The total width (W) will be:

$W = 25 + x + x$

$W = 25 + 2x$

The area (A) is:

$A = L * W$

$A = (18 + 2x) * (25 + 2x)$

Expand bracket

$A = 18 * 25 + 18 * 2x + 25 * 2x + 2x * 2x$

$A = 450 + 36x + 50x + 4x^2$

$A = 450 + 86x + 4x^2$

Reorder

$A = 4x^2 + 86x + 450$

8 0

2 years ago

3 and 5/16 as a decimal please explain

JulsSmile [24]

3.3125 you can find this answer by using a calculator

5 0

2 years ago