Work out the values of 9x - бу​

Answer:

x²-25

Step-by-step explanation:

Hi there!

We are given (x+5)(x-5) and we want to find their product.

As these are binomials, we can multiply them using FOIL, which is First, Outer, Inner, Last

So let's start with the firsts, which would be (x+5)(x-5), or the 2 x's; x*x=x²

Next, let's do the outers, which would be (x+5)(x-5); x * -5 = -5x

Now the inners; (x+5)(x-5); 5 * x = 5x
Finally, the lasts; (x+5)(x-5); 5 * -5 = -25

Now add all of these terms together:

x²-5x+5x-25

We can combine the 5x and -5x together to become x²-25

So the answer is x²-25, which is a difference of squares expression (if we have (a-b)(a+b), then the result is a²-b²).

Hope this helps! :)

See more on the difference of squares here: https://brainly.com/question/16085851

The length of the walkway is 24 ft, and you will need 24 stones to cover it.

The length of the walkway will be equivalent to the hypotenuse of a right triangle with cathetus of 23ft and 18ft, so we can use the Pythagorean theorem to get it:

L^2  =(23fy)^2 + (18ft)^2

L = √( (23fy)^2 + (18ft)^2 ) = 23.77ft

The walkway is 23.77 ft long.

Rounding to the nearest foot, the length is 24 ft.

b) If each stone covers 1 ft, then you will need 24 stones.

If you want to learn more about right triangles, you can read:

https://brainly.com/question/2217700

Answer:

y = -5/9x + 4.1

(try doing this yourself first with different points to make sure this is the right answer, because im to lazy to check myself but ill try checking D:)

Step-by-step explanation:

first you have to find the slope . to do this use the equation y2 - y1/ x2 - x1

so write as -2 - 3/  -7 - 2 is equal to -5/-9

so now write y = -5/9x + b

we must now find the y-intercept so substitute one of the points given. lets substitute 2,3 it looks easier. So it will look like 3 = -5/9(2) + b

3 = -5/9(2) + b

3 = -10/9 + b

b = 3 + 10/9

b = 4.111111

um just round to the tenth place

Answer:

There are 70 two digit numbers that are greater than or equal to 30

Step-by-step explanation:

hope it helps you

Answer:

  35

Step-by-step explanation:

There are 100 -30 = 70 2-digit positive integers. Half of them are odd.

There are 35 odd 2-digit positive integers greater than 30.

__

Additional comment

For n = 1 .. 35, those numbers are 2n+29.

Answer:

1. The circle’s radius is approximately 14 cm.

2. The circle’s radius is approximately 7 cm.

3. The circle’s area is approximately  154 cm2

Question:a circled circumference is approximately 44cm

Complete each statement using one of these values : 7,11,14,22,88,138,154,196,380,616, Answers without letters: 1. 14cm  2. 7cm 3. 154 cm2

Answer:

I don't know the answer but have a amazing day!<3

Step-by-step explanation:

Be happy.

.7 * 295.99 = original price

.7 * 295.99 = 207.193 = $207.19

Answer:

<4= 45○

Step-by-step explanation:

Step by step explanation is found on pic.

Hope that Helps :)

Answer:

HI = EF

Step-by-step explanation:

We are given that the sides GH and DE of the triangles are congruent. GH = DE

Also, we are given that the angles H and E are congruent.

H = E

Given that HI is congruent to EF, then the triangles are congruent, by Side Angle Side SAS

.

Answer: D. 36

Step-by-step explanation: Angle subtended by an arc at the centre is twice of the angle subtended at any point on the circle . And in the given diagram, angle subtended on the circle by arc XZ=60 degree . So arc XZ =2*60=120. Therefore measurement of arc xyz=360-120=240 degree.

The measurement of arc xyz is 240 degrees.

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

Angle subtended by an arc at the centre is twice of the angle subtended at any point on the circle .

In the given diagram, angle subtended on the circle by arc XZ=60 degree .

So arc XZ =2 times of 60

=2×60

=120.

The measurement of arc xyz=360-120=240 degree.

Hence, the measurement of arc xyz is 240 degrees.

To learn more on trigonometry click:

https://brainly.com/question/25122835

#SPJ7

Answer:

A. The shop will sell twice as many roses as daisies

Step-by-step explanation:

Look at each choice and use today's numbers.

A. roses: 18; daisies 9

18 is twice 9.

True

B. roses: 18; lilies: 12

18 and 12 are certainly not equal.

False

C. Lilies: 12, but roses 18

It's more roses than any other.

False

D. Lilies: 12; roses: 18

It's 6 more roses than lilies, not the other way around.

False

x = total amount split between Adam and Tom.

since we know the total amount split between both in a 18 : 17 ratio is "x", let's divide "x" by (18 + 17) and distribute accordingly to get the amount of each.

[tex]\stackrel{Adam~received}{18\cdot \cfrac{x}{18+17}}\qquad \qquad \stackrel{Tom~received}{17\cdot \cfrac{x}{18+17}} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{since we know that Adam got "5" more}}{ \stackrel{Adam}{18\cdot \cfrac{x}{18+17}}~~ = ~~\stackrel{Tom}{17\cdot \cfrac{x}{18+17}~~ + ~~5} }\qquad \implies \qquad \cfrac{18x}{35}~~ + ~~\cfrac{17x}{35}+5[/tex]

[tex]\stackrel{\textit{multiplying both sides by }\stackrel{LCD}{35}}{35\left( \cfrac{18x}{35} \right)~~ = ~~35\left( \cfrac{17x}{35}+5 \right)}\implies 18x~~ = ~~17x+175\implies \boxed{x =175} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{Tom~received}{17\cdot \cfrac{x}{18+17}}\implies \cfrac{17(175)}{35}\implies \blacktriangleright 85 \blacktriangleleft[/tex]

Answer:

Step-by-step explanation:

Yes

You almost have an isosceles triangle. The lengths of the longest line segments differ by by 0.3. So the base of the triangle is 2.8 and the long segments are connected to each other and each of them at end of 2.8

Answer:

i can't understand can u show it carefully

Answer:

Y=-x-1

explanation:

(1,-2)

(2,-3)

And use the slope formula, y2-y1/x2-x1

Where y2=-3

Y1=-2

X1=1

X2=2

So

-3+2/2-1=-1

So the slope is -1 and y intercept is -1

Let’s plug those values in:

Y=-x-1

Hope this helps!

Answer:

6 & 7.

Step-by-step explanation:

make one of the numbers x. The number succeeding it will be x +1

Their product is 42

x(x+1) = 42

x²-x-42=0

Step-by-step explanation:

I solved it by steps...

I hope you understand...

Answer:

3π, 6π

Step-by-step explanation:

12π*1/4=3π

16π*135/360=6π

the length of arc:

[tex]\tt =\dfrac{\alpha }{360}\times 2\pi.r[/tex]

5.

[tex]\tt \dfrac{90}{360}\times 2\pi6= 3\pi~yd[/tex]

7.

[tex]\tt \dfrac{135}{360}\times 2\pi.8=6\pi~km[/tex]

Answer:

4 because the edges are like vertices.

Answer:

76 cents

Step-by-step explanation:

Answer:

$16.32

Step-by-step explanation:

15.25 (1+0.07)

= 15.25 (1.07)

Distribute,

$16.32 (Total Amount)

Answer: 3 people had 4 credit cards.

Step-by-step explanation:

The question does not ask about the e-mail accounts, so you can ignore that. Then look for which line is for 4 cards and see how many dots are on the line, and there's your answer.

Answer:

1

Step-by-step explanation:

using the rules of exponents

[tex]a^{m}[/tex] × [tex]a^{n}[/tex] = [tex]a^{(m+n)}[/tex]  , [tex]a^{0}[/tex] = 1 , then

[tex]9^{4}[/tex] × [tex]9^{-4}[/tex]

= [tex]9^{(4+(-4))}[/tex]

= [tex]9^{(4-4)}[/tex]

= [tex]9^{0}[/tex]

= 1

Answer:

I think option no B

hope it will help you

7686:9=854

(7200+486):9=(800 + 54)

263349 people! :)

Hope this helps!

Answer:

M = 9

Step-by-step explanation:

the value of M is 9

Solution:

Note that:

Substitute the values into the expression to find the profit percentage.

Substituting the values.

The markup percentage is 233.33%.

Answer: The number is 2

Step-by-step explanation: Suzie says that [tex]\frac{1}{2}[/tex], which is half of a whole, is equal to only [tex]\frac{1}{4}[/tex] of the unknown number. This means that to find the value of the unknown number, you need to multiply [tex]\frac{1}{2}[/tex] by 4 so that it equals to [tex]\frac{4}{4}[/tex] of the mystery number.

Simply put, multiply [tex]\frac{1}{2}[/tex] by 4. Then reduce for the answer, and this gives us these equations.

[tex]x=4(\frac{1}{2} )[/tex]

[tex]x=\frac{4}{2}[/tex]

[tex]x=2[/tex]

Hope that this helps!