7x+21 simplify the expression

Answer:

Total money left with Jamie = £13

Step-by-step explanation:

Jamie received pocket money = £26

He spent on sweets = 10% of total pocket money

Expense on magazines = 25% of the total money

Expense on games = 15% of the pocket money

Total expenditure on sweets, magazines and games = [tex]\frac{10}{100}+\frac{25}{100}+\frac{15}{100}[/tex]

= [tex]\frac{50}{100}[/tex] Or 50% of the pocket money he received

Therefore, money left with Jamie = 50% of total money he received as pocket money

= [tex]\frac{50}{100}\times 26[/tex]

= £13

=================================================

Explanation:

Adding an even number to an odd number always results in an odd number

even + odd = odd

odd + even = odd

So if 'a' is odd, adding 2 onto it (even number), leads to an odd result of a+2.

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Extra Information (optional section)

If you are curious why the two equations shown above are true, then here's a proof.

Let 'a' be an odd number. This means a = 2k+1 for some integer k. We add 1 to any multiple of 2 and it goes from even (2k) to odd (2k+1).

If we made b an even number, then b = 2m for some integer m.

Adding 'a' and b gives us...

c = a + b

c = ( a ) + ( b )

c = ( 2k+1 ) + ( 2m )

c = (2k+2m) + 1

c = 2(k+m) + 1

c = 2n + 1 .... where n = k+m

The result a+b is an odd number since it is in the form 2*(integer)+1

It verifies the claim that odd+even = odd.

So this shows that a+2 is also odd, since we let b = 2.

Answer:

on the attached pdf

Step-by-step explanation:

Answer: 77 pounds each month I think

I hope this helped

Answer:

sorry dont know

Step-by-step explanation:

Answer:

9p = 81 degrees

Step-by-step explanation:

All the angles in a triangle equal 180 degrees in total.

So the equation would be:

9p + 7p + 4p = 180

20p = 180

p = 9

So just plug it in:

9(9)                            7(9)                        4(9)

81 degrees            63 degrees            36 degrees

Answer:

Step-by-step explanation:

Solution for Solve for x. Assume that lines which appear tangent are tangent. 5) 13x + 2 T. U V 48° S. 130° M. ... A: Given: fx,y,z=x2y3+z4 and x=s2, y=st2 and z=s2t. a) Calculate the primary derivatives ∂f∂x, ∂f∂y, ∂f

Answer:

m = - 3, c = - 2

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Given

2y + 6x = - 4 ( subtract 6x from both sides )

2y = - 6x - 4 ( divide terms by 2 )

y = - 3x - 2 ← in slope- intercept form

with slope m = - 3 and y- intercept c = - 2

Answer:

y = 20x

brainliest pls

also it’s your for the last you’re

Step-by-step explanation:

since y is the total cost and x is the total hours at 20 dollars an hour then we have 20 times the number of hours to get y

Answer:

y = 20x

Step-by-step explanation:

Cost of x hours is:

20x

Hence, since y = total cost,

y = 20x

Responder:

$ 3720

Explicación paso a paso:

Dado que:

Tasa mensual, r = 8%

Principal, P = $ 3000

Duración o período, t = 3 meses

La cantidad final, A, que pagará después de 3 meses:

Usando la fórmula de interés simple:

A = P (1 + rt)

A = 3000 (1 + 0,08 * 3)

A = 3000 (1 + 0,24)

A = 3000 (1,24)

A = $ 3720

Answer:

option B and D, I believe.

Step-by-step explanation:

In option B its times itsself

in option D it is x times y (y=5)

Answer:

x=-1.5

Step-by-step explanation:

Answer:

uhuhh hold on I'ma brb bro bro

Answer:

158ft squared

Step-by-step explanation:

Front: 40

Back : 40

Right side : 15

Left side : 15

Top : 24

Bottom : 24

Total : 158ft squared

Hope this helps!

The surface area of the rectangular prism 158 square feet.

The space occupied by any two-dimensional figure in a plane is called the area. The area of the outer surface of any object is called the surface area.

The rectangular prism will have six faces. The surface area will be calculated as:-

Surface area = 2 ( 3x5) + 2 ( 8x3) + 2(8x5)

Surface area = 30 + 48 + 80 = 158 square meters

Therefore the surface area of the rectangular prism is 158 square feet.

To know more about a surface area follow

https://brainly.com/question/25292087

#SPJ2

Answer:

-3.19758974227

Answer:

The sin of -1 (3, 8) is (330).

Answer:

51 degress

Step-by-step explanation:

sin x = 7/9

x = sin^-1 (7/9)

simply using a calculator.

Answer:

x = 51 degrees

Step-by-step explanation:

(to find x, use sine)

Sine = [tex]\frac{opposite}{hypothenuse}[/tex]

⇒ Sine x = [tex]\frac{7}{9}[/tex]

⇒ [tex]\frac{7}{9}[/tex] = 0.78

⇒ Sine x = 0.78

then calculate what Sine-1 of 0.78 is:

⇒ Sine-1 of 0.78 = 51.26

x = 51.26

Round to the nearest degree:

51.26 ⇒ 51 degrees

Answer:

208 in

Step-by-step explanation:

[tex](8x8)+(\frac{1}{2} x8x9)x4in^{2} \\\\=64+36x4 in\\ \\=208 in^2[/tex]

have a great day!!

Answer:

[tex]208 in^2[/tex]

Step-by-step explanation:

Total surface area

(8×8)+(1/2×8×9)×4in²

= 64+36×4in²

=64+144in²

= 208 in²

●∘◦❀◦∘●∘◦❀◦∘●∘◦❀◦∘●∘◦❀◦∘

hope it helps...

have a great day!!.

Answer and Step-by-step explanation:

To solve, we would multiply by the reciprocal of the portion Jada has read, and multiply that number to 75.

The reciprocal means the the value, but flipped, so [tex]\frac{3}{5}[/tex] will become [tex]\frac{5}{3}[/tex].

Now we do 75 times [tex]\frac{5}{3}[/tex]/

[tex]\frac{75 * 5}{3} \\\\\\\\\frac{375}{3} \\\\\\\\125[/tex]

So, there are 125 total pages in the book.

#teamtrees #PAW (Plant And Water)

Answer: 39

Step-by-step explanation:

Answer:

um i think  about 39 foot it has been a little scenes i have done this

Step-by-step explanation:

Answer:

$79.30

Step-by-step explanation:

22% of 65 is 14.30

14.30 + 65 = 79.30

Stay safe! <3

Answer:

C) 0.972

Step-by-step explanation:

I am just as confused as you are but i tried understanding what "at least one" meant and my 2nd option was X>= 1, or something to that effect where 10 to 1 coupons being possible.

Answer:

what do you call a white person having a seizure...............................milk-

shake  

Step-by-step explanation:

Answer:

-10

Step-by-step explanation:

-5(2) - 4(-1) - 8 +2(2)

Answer:

-10

Step-by-step explanation:

-5(2)-4(-1)-8+2(2)=

-10+4-8+4=-10

-×- is +

-×+ is -

Answer:

V=πr2h

Explanation:

Hope this helps

Answer:

πr^2h

Step-by-step explanation:

it's pie multiplying square of radius and height of cylinder

Answer:

x > -8

Step-by-step explanation:

i hope this helps :)

Answer:

The first one or A. 6.5y + 10

Step-by-step explanation:

0.5y + 10.5 + 6.5y - 0.5 - 0.5y

10.5 + 6.5y - 0.5

6.5y + 10

Answer:

Step-by-step explanation:

x + y = 4

x = 4 - y

2x - 3y = 6

2x - 3y = 6

2(4 - y) - 3y = 6

8 - 2y - 3y = 6

-5y = 6 - 8

-5y = -2

y = 2/5

x = 4 - y

x = 4 - 2/5

x = 20/5 - 2/5

x = 18/5

Answer:

Step-by-step explanation:

8a^12

----------

b^6

^ means to the power of, problem is that i have a hard time adding the actual symbol.

so when you see ^ when you answer you would have to put it like this:

    12

8a

--------

    6

b