If u times 23 by 10 shouldn't u get 230 but my teacher says that's not it u have to did everything but I don't know what to did die

Answers

Answer 1

Answer: it is 230 I just clculated

Answer 2

Answer: Um well I think you should double check

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Express 756 as a product of its prime factors

Answers

$756 = 2 ^(2) *3^3*7$

The straight line with equation $y = 11x - 28$
is a tangent to the curve
$y = {x}^(3) - a {x}^(2) + bx - 1$
at the point (3,5). Find A, the coefficient of
${x}^(2)$

Answers

Answer:

$a=3$

Step-by-step explanation:

The equation of the curve is

$y=x^3-ax^2+bx-1$ .

The gradient function is given by

$(dy)/(dx)=3x^2-2ax+b$

The gradient of this curve at the point (3,5) is equal to the gradient of the tangent $y=11x-28$ which is 11.

$\Rightarrow 11=3(3)^2-2a(3)+b$

$\Rightarrow 11=27-6a+b$

$\Rightarrow b-6a=-16...(1)$

The given point, (3,5) also satisfies the equation of the curve.

$\Rightarrow 3^3-a(3)^2+b(3)-1=5$

$\Rightarrow 27-9a+3b-1=5$

$\Rightarrow3b-9a=-21$

$\Rightarrow b-3a=-7...(2)$

Equation (2) minus equation (1) gives

$-3a+6a=-7+16$

$3a=9$

This implies that;

$a=3$

Antonio read 1/2 of the pages in a chapter in his book.If he read 9 pages,how many pages are in the chapter??

Answers

9 is 1/2 of the chapter, find the whole.

9 + 9 = 18
1/2 + 1/2 = 1

18 is the number of pages in the chapter

1/2 = 9 then 1 = 18. The answer is 18.

A sphere has a radius of 31 millimeters. Find it's volume to the nearest tenth please. (Use 3.14 for pi)

Answers

Answer:

V ≈ 124,725 mm^3

Step-by-step explanation:

Let's use the formula for volume of a sphere:

$v = (4)/(3)\pi {r}^(3)$

$v = (4)/(3) (3.14) {31}^(3)$

$v = (4)/(3)(3.14)29791$

$v = (4)/(3) 93543.74$

$v = (4)/(3) * (93543.74)/(1) = (374174.96)/(3)$

$v = 374174.96 / 3$

The string is stretched by two equal and opposite forces 10N each. The tension in the string is. a)zero b)20N

Answers

Since the forces are opposite and equal they balance each other out
The tension in the string is a)zero

The measures of the angles RST are given by the expressions in the table.

Answers

To find the value of x, and then find the angles of triangle RST, we first need to set up an equation equal to 180.

First, the equation = 180:

We have 31, x+4, and 3x+9.
What we can do is make an equation in which adds the angles to equal 180.
As so:

31 + x + 4 + 3x + 9 = 180

Combine like terms:

31 + x + 4 + 3x + 9 = 180
44 + x + 3x = 180
44 + 4x = 180

Now, we need to simplify this further by subtracting 44 from each side:

44 - 44 + 4x = 180 - 44
4x = 136

Next, to simplify this equation even further, we need to divide each side by 4 (Resulting in the x being alone on one side of the equation.)

4x / 4 = 136 / 4
x = 136 / 4
x = 34

Awesome! We now know that x = 34!
However, we are not completely finished with this problem. Let's continue.

To find the angles of S and T, we need to substitute 34 in for x:

S:
(x + 4)
(34 + 4)
38 degrees

T:
(3x + 9)
(3(34) + 9)
(102 + 9)
111 degrees

Amazing! We now can conclude all of the angles' measurements:
R = 31
S = 38
T = 111
Also, x = 34.

Hope I could help you out! If my math is wrong or it isn't the answer you were looking for, please let me know!
Have a good one.

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