how do i do this??

5% of a number is equal to 9. What is the number?

Step-by-step explanation:

First we solve it.

I'll use substitution.

In the first equation y equals -2x+2 so we can apply that to the second equation

2y + 4x = 4

2(-2x+2) + 4x = 4

distribute

-4x+4+4x=4

simplify

4=4

To figure out how many solutions it has:

•If both side of the equal sign are exactly the same: Infinitely many

ex: 6x=6x

•If both sides of the equal sign do not match when completely simplified: No solutions

ex: 3x=-5x

•If it creates an equation: 1 solution

ex: x=3+2y

Since both sides of the equal sign are 4, we have infinitely many solutions.

Hope this helps! If you have any questions on how I got my answer feel free to ask. Stay safe!

Still stuck? Get 1-on-1 help from an expert tutor now.

Answer:

7.35 is 49% of 15.

Step-by-step explanation:

Answer:

7.35%

Step-by-step explanation:

An equation is formed when two equal expressions are equated together with the help of an equal sign '='. The value of y in the equation is -1.5.

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

The value of y in the equation can be found in the following manner,

[tex]2y=-3\\\\y=\dfrac{-3}{2}\\\\y = -1.5[/tex]

Hence, the value of y in the equation is -1.5.

Learn more about Equation:

https://brainly.com/question/2263981

Answer:

-1

Step-by-step explanation:

Step-by-step explanation:

Ok, so first...

a) if x is positive, it will remain x, so *x<7*

b) if x+3 is positive, it will be x+3<9 but you have to simplify it so you subtract 3 on both sides and get *x<6*

c) if y-8 is positive, it will stay like that, and you then add 8 on both sides to get *y>19*

g) if 3x-1 is positive, it will be 3x-1 greater than or equal to 18. add 1 on both sides and *3x > or = to 18*

4y+3 < or = 13. subtract 3 on both sides and you get *4y < or = 13*

One more thing:

Less than or equal to is a '<' with a line underneath.

Greater than or equal to is a '>' with a line underneath.

Answer:

12

Step-by-step explanation:

Solution:

We know that:

Substituting the height and the area of the pane in the formula

Simplifying the LHS:

Dividing 24 both sides

Thus, the measure of the base is 24 inches.

[tex]\textit{circumference of a semi-circle}\\\\ C=\pi r~~ \begin{cases} \stackrel{\textit{half diameter}}{r=radius}\\[-0.5em] \hrulefill\\ r=8 \end{cases}\implies C=\pi (8)\implies \stackrel{using~\pi =3.14}{C=25.12}[/tex]

Answer:  n ≤ 52

Step-by-step explanation:

less than or equal to is usually write as ≤.

n - 15 ≤ 37

  +15    +15 [Add 15 to the both sides]      

     n ≤ 52

x = 25

Hi there !

4x - 25 = 25 + 2x

4x - 2x = 25 + 25

2x = 50

x  = 50 : 2

x = 25

Good luck !

Answer:

Step-by-step explanation:

Train 1 speed be 'u'

Train 2 speed be 'v'

And v=2u

Speed=distance/time

Trains going in opposite directions

Relative speed= v-u (as train 1 I slower than train 2)

v-u=600/4

2u-u=150

u=150miles/hour

v=300miles/hour

Answer:

Triangle =  1 1/2

Square = 10

Step-by-step explanation:

Given:

Triangle + Triangle + Square + Square = 23

Square - Triangle = 4 1/2

10 + 10 + 1 1/2 + 1 1/2 = 23

Hence, Square = 10 and Triangle = 1 1/2

~Lenvy~

AnswerA &D

Step-by-step explanation:A

D

12+z=56

z=56-12

z=44

26-x=17

-x=17-26

-x=-9

x=9

8+5z=43

5z=43-8

5z=35

z=35/5

z=7

Answer:

The actual length of the room is 40 feet

Step-by-step explanation:

Given

[tex]Scale = \frac{1}{2}\ inch : 12\ feet[/tex]

Required

Determine the actual measurement of [tex]3\frac{1}{3}\ inches[/tex]

Represent the required actual measurement with x

i.e.

[tex]3\frac{1}{3}\ inches : x[/tex]

And we have:

[tex]\frac{1}{2}\ inch : 12\ feet[/tex]

[tex]3\frac{1}{3}\ inches : x[/tex]

Cross Multiply

[tex]x * \frac{1}{2} = 12 * 3\frac{1}{3}[/tex]

Convert fraction to improper fraction

[tex]x * \frac{1}{2} = 12 *\frac{10}{3}[/tex]

[tex]\frac{x}{2} = \frac{120}{3}[/tex]

[tex]\frac{x}{2} = 40[/tex]

Multiply both sides by 2

[tex]x = 40 * 2[/tex]

[tex]x = 80\ feet[/tex]

The actual length of the room is 40 feet

Step-by-step explanation:

1.

x=5

y=4

2.x=4.2

y=19.8

3. x=16

y=70.4

4. a=28

b=25/7

5.a=20

b=18

6. a=51

b=75

7. x=30

y=21

8.a=27

b=6

hope it helps:)

ignore that fig '-'

Answer:k

Step-by-step explanation:

Answer:

count 1035 28 times i guess.

Step-by-step explanation:

Answer:

x = 25

Step-by-step explanation:

The sum of the three interior angles of a triangle is always 180°.

4x + 2x + 30 = 180

6x + 30 = 180

6x = 150

x = 25

Answer:

sum of the interior angles of a triangle =180

2× + 4× + 30=180

6× + 30= 180

6× + 30 = 180

6× = 180-30

6× =150

6×/6=150/6

×= 25

Answer:

19

Step-by-step explanation:

Answer:

A and C

Step-by-step explanation:

m =  1 - (-1) / 3-2 = 2/1 = 2

m = -3 - (-1) / 1 - 2 = -2/-1 = 2

Answer:

11+n

Step-by-step explanation:

eleven increased by a number

11+n

hope it helps

The histogram showing the number of events with the events cost is

misleading because;

Please find attached a possible diagram of the histogram in the question

created with MS Excel;

The data in the histogram is presented as follows;

[tex]\begin{array}{|c|c|c}Event \ Cost&Number \ of \ Events\\1000- 1499&2\\1500-1999&4\\2000-2499&3\\3000-3499&1\end{array}\right][/tex]

From the above table, we have that the class with event cost of 2000 to

2499 is left out, therefore, the data is more clustered.

The correct option is therefore;

The x-axis scale shows the data is more clustered than it actually is

Learn more about histograms here:

https://brainly.com/question/1413492

Answer:

its a

Step-by-step explanation:

got it right on edge

Answer:

1 quart = 32 ounces

so we have 64 ounces

8.32 ÷ 64 ounces = $0.13 per ounce

Answer:

10

Step-by-step explanation:

The radioactive isotopes of an element are known as radioisotopes.  The radioisotope sample that is given is Barium-139.

The radioactive isotopes of an element are known as radioisotopes. Atoms with an unstable mix of neutrons and protons, or excess energy in their nucleus, are also known as neutron-proton atoms.

As it is given that the initial mass of the sample at 12:02:00 PM is,

[tex]m_1=104.8\ kg[/tex]

The Mass of the sample at 4:11:00 PM is given as

[tex]m_2 = 13.1 kg[/tex]

So here since it is a sample of radioactive isotope so here we will say

[tex]m_2=m_1e^{-\lambda t}[/tex]

Now from the above data, we know that the time taken to reduce the mass is

[tex]\rm t = 4\ hours\ 9\ minutes = 4.15\ hours[/tex]

Further, from the above equation, we will have

[tex]13.1 =104.8 e^{-\lambda(4.15)}\\\\\lambda(4.15)=2.08\\\\\lambda = 0.50/ hour[/tex]

So here half-life is given as

[tex]\rm T_{\frac12}=\dfrac{ln2}{\lambda}\\\\ T_{\frac12} = 1.4\ hours[/tex]

Thus, here this isotope must be the one that will have a half-life of 1.4 hours

Therefore, it is nearly Barium-139.

Hence, the radioisotope sample that is given is Barium-139.

Learn more about Radioisotope:

https://brainly.com/question/49002

Answer:

3m+4n

Step-by-step explanation:

5m-2m=3m 3n+n=4n so 3m+4n

Answer:

the correct answer for the rectangular prisim is 32

The surface are of the rectangular cuboid is 32.

1. Label the length (l), width (w), and height (h) of the prism

2. Use the formula, SA=2lw+2lh+2hw, to find the surface area.

Another option:

- Add the areas of all 6 faces

Answer:

The answer is 13

Step-by-step explanation:

ABC is equal to GHI, so AB = GH which is 13

Answer:

.8888888889

Step-by-step explanation:

caculator

Answer:

80 / C

Step-by-step explanation:

Easy peasy 161 divided by 2 is 80.5, but you can't buy half of a sign. Round downwards.

Answer:

C

Step-by-step explanation:

Answer:

x² + 8x + 16

Step-by-step explanation:

(x + 4)²

= (x + 4)(x + 4)

Each term in the second factor is multiplied by each term in the first factor, that is

x(x + 4) + 4(x + 4) ← distribute parenthesis

= x² + 4x + 4x + 16 ← collect like terms

= x² + 8x + 16