9 kg of washing powder cost $10.80. What is the cost of 1 kg of washing powder?

Answer:

Remember you can replace the varibles in the equation above with the number equal to the main varible to get your answer

Step-by-step explanation:

Hope this helps!

Answer:

Step-by-step explanation:

1) 8.9

2) 27.8

3) 24.3

4) 11.4

5) 27.5

6) 49.2

7) 8.1
8)4.8

Answer: It's the third one / C

Step-by-step explanation:

Step-by-step explanation:

-5x - 3 = -18

that's the answer

Answer:

No, theyre not proportional

Step-by-step explanation:

48/84=4/7

60/96=5/8

5/8 does not equal 4/7

Answer:

  16°

Step-by-step explanation:

The trig function tangent relates an acute angle of a right triangle to the measures of the adjacent and opposites sides. Those are the sides given here, so the relevant trig relation is ...

  Tan = Opposite/Adjacent

  tan(?) = 14/49 = 2/7

When the tangent of the angle is known, the inverse tangent function can be used to find the angle:

  ? = arctan(2/7) ≈ 16°

The value of "?" is about 16°.

Answer:

( a+b) ( m^2 + n^2)

Step-by-step explanation:

factorise like terms

m^2 ( a + b ) + n^2 ( m^2 + n^2)

then put like terms together put remaining terms in a bracket

( a + b) ( m^2 + n^2 )

Answer:

x=8.

Step-by-step explanation:

according to the given coordinates the required line is vertical (the value of 'x' is 8), then the required equation is: x=8.

Answer:

200mm^2 is the area of shadded region

Simplify

[tex]\\ \rm\longmapsto y=(x-20)^2+5[/tex]

[tex]\\ \rm\longmapsto y=x^2-40x+405[/tex]

Graph attached

Answer:

no real zeros

Step-by-step explanation:

We are given the following quadratic function:

[tex]y = {(x - 20)}^{2} + 5[/tex]

firstly simplify it to standard form which is

[tex]y = {x}^{2} -40x + 405[/tex]

To figure out the real zeros, set y to 0:

[tex] {x}^{2} - 40x + 405 = 0[/tex]

recall that,a quadratic equations has real zeros in case its discriminant is greater than or equal to 0, therefore

consider,

now substitute:

[tex] { (- 40)}^{2} - 4(1)(405) \stackrel{ ? }{ \geq}0[/tex]

simplifying yields:

[tex] 1600 - 1620 \stackrel{ ? }{ \geq}0 \\ - 20 \ngeq 0[/tex]

hence, The function has no real zeros

Answer: i think D sorry if wrong

can we be friend

Answer:

There are a total of twelve possible outcomes. This is because flipping a coin has two possible outcomes (either heads or tails) and rolling a number cube has 6 of them (1-6) so 2 times 6 is 12.

If you want to draw a tree diagram, first split your tree into two branches, one for heads and one for tails. Then, split both branches into 6 sub-branches each, so each branch has a full set of numbers from 1-6.

Or you can do it the other way around, first split your tree into 6 branches, then split all branches into 2 sub-branches each.

hope this helps :)

Answer:

i THINK its 18.75% per year

Step-by-step explanation:

r = (1/8)((3,000/1200) - 1 ) = 0.1875

r = 0.1875 * 100 = 18.75

(dont take my word tho, u should double check yourself)

Answer:

1). Flooding

2). A farming method of the Maya was Slash and Burn

3). Japan

4.)C) Incas Indians

Step-by-step explanation:

Hope this helps

Answer:

23. Reflexive property

24. Transitive property

Step-by-step explanation:

In algebra, the reflexive property of equality states that a number is always equal to itself. Reflexive property of equality. If a is a number, then a = a

The Transitive Property states that for all real numbers x ,y, and z, if x=y and y=z , then x=z .

Answer:

A = P (1 + i)^n      A is the final amount

                            P is the initial amount

                            i = interest / period

                            n = number of periods

A = 315 * (1 + .015)^1.5 = 322.11

Answer:

Cups 32 80 96. 128. 160

Gallons 2. 5. 6. 8. 10

I think it will help you

Answer:

Step-by-step explanation:

2:27

Answer:

D

Step-by-step explanation:

x,y 2,3 just trust me good sir

Answer:

y = -2/3x - 6 (B)

Step-by-step explanation:

There not really an explanation to be made. You've got to count points correctly and number your graph appropriately to get a correct answer.

Answer:

541686

Step-by-step explanation:

678,686-137,000=541686

Step-by-step explanation:

this is one of the formulas you should remember for life :

the general solution for a quadratic equation

ax² + bx + c = 0

is

x = (-b ± sqrt(b² - 4ac))/(2a)

in our case that is

x = (-4 ± sqrt(4² - 4×1×-1))/(2×1) = (-4 ± sqrt(16 + 4))/2 =

= (-4 ± sqrt(20))/2 = (-4 ± sqrt(4×5))/2 =

= (-4 ± 2×sqrt(5))/2 = -2 ± sqrt(5)

x1 = -2 + sqrt(5) = 0.236067977...

x2 = -2 - sqrt(5) = -4.236067977...

so, the negative solution is the x2 solution :

-4.236067977...

I don't know to how many decimal positions you are supposed to round. it is not specified in your problem definition.

Answer:

A. 1/3 (3/2 x -1) = -1/2

Step-by-step explanation:

Step by step is in the document.

hope that helps

Your second last answer is right mark me Brainlist as you say : )

Answer:50.3m

Step-by-step explanation:

Answer:

[tex] \\ [/tex]

Step-by-step explanation:

To find the circumference of the circle, we must know this formula

[tex]\\{ \longrightarrow \qquad{ \underline {\boxed{ \pmb{ \mathfrak{ \: \: Circumference_{(circle)} = 2 \pi r}}}}}} \: \: \bigstar \\ \\ [/tex]

Where,

With the help of this formula, we can find the circumference of the circle.

[tex] \\ [/tex]

Now, we'll substitute the values in the formula :

[tex] \\ { \longrightarrow \qquad{ \sf{ \: \: Circumference_{(circle)} = 2 \times 3.14 \times 8}}} \: \: \\ \\ [/tex]

[tex]{ \longrightarrow \qquad{ \sf{ \: \: Circumference_{(circle) }= 3.14 \times 16 }}} \: \: \\ \\ [/tex]

[tex]{ \longrightarrow \qquad{ \pmb{ \frak { Circumference_{(circle) }= 50.24\: }}}} \: \: \\ \\ [/tex]

Therefore,

Answer:

B. Different of Squares

Step-by-step explanation:

Answer:

I don't know. You need to ask someone else.

Answer:

1) The error is 3x² - 3x - 18 = 3(x² - 3x - 18)

The 3 needs to be factorised out of each term in the brackets not just 3x² → the correction is 3x² - 3x - 18 = 3(x² - x - 6) → 3(x - 3)(x + 2)

2) The 5 and 1 are written in the wrong brackets; it should be (10x - 1)(x + 5)

Hope this helps!

The Cena can take 7 courses

We have given that the karate charges $35 for the first course and $22.50 for each course after that. Our total is $170.

[tex]22.50x + 35 = 170[/tex]

for solving this linear equation

First, subtract 35 from both sides.

[tex]22.50x = 135[/tex]

isolate x so divide both sides by 22.50.

[tex]x=\frac{135}{22.50}[/tex]

Therefore we get x = 6

Remember to add the additional class, so x is actually 7.

So,the Cena can take 7 courses.

To learn more about the linear equation visit:

https://brainly.com/question/1549055

Answer:

7 courses

Step-by-step explanation:

Answer:

[tex]x=\frac{y-b}m[/tex]

Step-by-step explanation:

We subtract b from both sides.

[tex]y-b = mx[/tex]

We divide both sides by m  (as long as [tex]m\ne0[/tex]) and read right to left.

[tex]x= \frac{y-b}m[/tex]

Answer:

[tex]x=\frac{y-b}{m}[/tex]

Step-by-step explanation:

[tex]\mathrm{Switch\:sides}[/tex]

[tex]mx+b=y[/tex]

[tex]\mathrm{Subtract\:}b\mathrm{\:from\:both\:sides}[/tex]

[tex]mx+b-b=y-b[/tex]

[tex]\mathrm{Simplify}[/tex]

[tex]mx=y-b[/tex]

[tex]\mathrm{Divide\:both\:sides\:by\:}m;\quad \:m\ne \:0[/tex]

[tex]\frac{mx}{m}=\frac{y}{m}-\frac{b}{m};\quad \:m\ne \:0[/tex]

[tex]\mathrm{Simplify}[/tex]

[tex]x=\frac{y-b}{m};\quad \:m\ne \:0[/tex]

[RevyBreeze]