please help :(
if you can please also give a explanation. thanks

Answer:

3x-3=2x, x=3

Step-by-step explanation:

so you want to move all the numbers with x to the left side of the equation

subtract 2x from both sides of the problem

3x-3-2x=0

subtract 2x from 3x

then add 3 to both sides of the equation

x=3

Answer:

Step-by-step explanation:

Two faces are 6” by 9”. Two faces are 6” by 2”. Two faces are 9” by 2”.

Surface are = 2*6*9 + 2*6*2 + 2*9*2 = 108 + 24 + 36 = 168 square inches

Answer:

That is false.

The sum of any two sides in a triangle must be greater than the length of the third side.

We can see that: 7+9 = 16, and 16 is not greater than 18.

So, this is not a triangle.

Let  me know if this helps!

Answer:

the percentage that you are trying to find

for ex if you were trying to figure out how to find 4.5 % thank you would put the over 100% and then divide it.

Step-by-step explanation:

Answer:

Step-by-step explanation:

#3.

n x n - 5 = -4

n x n = 5 + -4

n x n = 1

n = 1

#5.

7x^2 + 1 = 29

7x^2 = 29 - 1

7x^2 = 28

x^2 = 28 / 7

x^2 = 4

x = 2

Hope that helps!

Answer:

P(Type II error) = 0.1

Step-by-step explanation:

In statistics, the formula for power of a hypothesis is given by;

Power = 1 - P(Type II error)

Where P(Type II error) is the probability of making a Type II error.

We are told that the power is 0.9.

Thus;

0.9 = 1 - P(Type II error)

Making P(Type II error) the subject gives;

P(Type II error) = 1 - 0.9

P(Type II error) = 0.1

Answer:

1. a) rule is that it adds 5 every time

1.b) 25, 30, 35

2.a) rule is that it adds 0.2 every time

2.b) 2.1, 2.3, 2.5

Answer:

9.) would be 89 and 10.) would be 1500 ft

Answer:

A. 89 B. 1200 ft

Step-by-step explanation:

A.

5(-4²)+9

5(16)+9

80+9

89

B.

-150+1350=

1200

Answer:

73.4

Step-by-step explanation:

I’m 96% sure this is the answer

Answer: The distance between starting and ending point is 34 miles.

Answer:

Pretzels: 30 ounces, Nuts: 15 ounces

Step-by-step explanation:

Trust me.

Number of ounces of nuts = 30

Number of ounces of pretzels = 15

What is an expression?

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

Jamal is making a snack mix with pretzels and nuts.

And, For every ounce of nuts, he will use 2 ounces of pretzels.

Total number of snake mix = 45 ounces

Now,

Let number of ounces of pretzels = y

Let number of ounces of nuts = x

So, We can formulate;

⇒ x = 2y    ... (i)

And, x + y = 45     .... (ii)

Substitute the value of x in equation (ii) , we get;

x + y = 45  

2y + y = 45  

3y = 45

y = 15

And,

x + y = 45  

x + 15 = 45

x = 30

Therefore,

Number of ounces of nuts = 30

Number of ounces of pretzels = 15

Learn more about the mathematical expression visit:

https://brainly.com/question/16583268

#SPJ2

Answer:

Step-by-step explanation:

Both equations have -7y. You can eliminate them by subtracting one equation from the other:

Multiply equation 1 by -1, then add it to equation 2:

-2x + 7y = 74

3x - 7y = -83

———————

x = -9

2x - 7y = -74

2(-9) - 7y = -74

-7y = -56

Y = 8

(x,y) = (-9, 8)

Answer:

9

Step-by-step explanation:

for this problem, plug in 2 for every x

2^2 + 5(2) -5

4 + 10 -5= 9

Answer:

9

Step-by-step explanation:

plug 2 in whenever you see the x

Answer:

$38.4

Step-by-step explanation:

20%=0.20

32*0.20=6.4

32+6.4=38.4

Answer:

i dont know lol

Step-by-step explanation:

why you asking me

Step-by-step explanation:

step 1. -6(-2/3 + 2x)

step 2. 12/3 + -12x. distributive property

step 3. 4 - 12x.

Answer:

This problem needs more information.

Step-by-step explanation:

Answer:

He will get to save 25 dollars.

Step-by-step explanation:

percentage formula:

($125×20) ÷ 100

(2500) ÷ 100

= 25

Answer:25

Step-by-step explanation: because you divide 11by20 hthen you add in th ermaneder

Answer:

The least expensive cost = $245.32

Step-by-step explanation:

From the information:

Volume of the rectangular container = 10 m²

Assume the width of the container is = w

The base = 2 × width

= 2(w)

Volume = height × base × width

10 = h × 2w × w

[tex]h = \dfrac{10}{2w^2}[/tex]

[tex]h = \dfrac{5}{w^2}[/tex]

Now, to calculate the area of the base; we have:

[tex]Area = length \times width[/tex]

[tex]Area = 2w \times w[/tex]

[tex]Area = (2w^2) \ m^2[/tex]

[tex]Cost \ of \ base = 15 * 2w^2[/tex]

Cost of base = [tex]30w^2[/tex] --- (1)

[tex]Area \ of \ side = 2 ( height \times length ) + 2( height \times width) \\ \\ = 2 (h \times 2w) + 2(h\times w) \\ \\ = 4hw + 2hw \\ \\ = 6 hw \\ \\ = 6 \times \dfrac{5}{w^2} \times w \\ \\ Area = \dfrac{30 }{w} \ m^2[/tex]

Let's not forget that the cost of the sides = $9 per m²

Thus; the cost of the sides will be [tex]= \$ 9 \times \dfrac{30}{w}[/tex]

the cost of the sides [tex]= \dfrac{\$270}{w}[/tex]

Thus the total cost = cost of base = cost of sides

[tex]C(w) = 30w^2 + \dfrac{270}{w}[/tex]

By differentiation;

[tex]C'(w) = \dfrac{dC}{dw} \\ \\ = 30 \times 2w + 270 ( \dfrac{-1}{w^2}) \\ \\ C'(w) = 60 w - \dfrac{270 }{w^2} \\ \\[/tex]

[tex]\text{To determine the minimum cost:} \\ \\ C'(w) = 0 \\ \\ So, 60 w - \dfrac{270}{w^2}= 0 \\ \\ \text{By integrating w.r.t w} \\ \\ w ( 60 - \dfrac{270}{w^3}) =0 \\ \\ \implies 60 - \dfrac{270}{w^3} \\ \\ w^3 = \dfrac{270}{60} \\ \\ w^3 = \dfrac{9}{2} \\ \\ w = (\dfrac{9}{2})^{1/3} \\ \\ w = 1.6509 \ m[/tex]

From; [tex]C(w) = 30w^2 + \dfrac{270}{w}[/tex]

[tex]Cos t = \dfrac{30 w^3+ 270}{w} \\ \\ =\dfrac{30 (\dfrac{9}{2})+ 270}{1.6509} \\ \\ = \dfrac{135+270}{1.6509} \\ \\ = \dfrac{405}{1.6509} \\ \\ \mathbf{Cost = \$245.32}[/tex]

Answer:

1-1=0 haha

Step-by-step explanation:

if you have one ball and then take away one ball, you will have zero balls

Answer:

56 degrees    :)

Answer:

56 degrees

Step-by-step explanation:

the angle next to 76 degrees is a straight line so it is supplementary, meaning it is 104 degrees.

Because the two lines are parallel, and are cut through a transversal, the angle that we just found is actually equal to 48+x because of alternate interior angles. solving for x we get 104-48 = x

x=56

Answer:

D

NOTE: 1 HOUR IS 60 MINUTES

do 60+40 gives u the minute which is 100

then 100 x30% = 30

NOTE: for the second round up the digit and multiply it  by 65

so 40.4 x 65 gives 62. something

the nearest number is 60 % so 60% is the answer

Please mark as brainliest

Have a great day, be safe and healthy

Thank u  

XD

Answer:

D

NOTE: 1 HOUR IS 60 MINUTES

do 60+40 gives u the minute which is 100

then 100 x30% = 30

Please mark as brainliest

Have a great day, be safe and healthy

Thank u  

XD

Answer:85 degrees

Step-by-step explanation:

Formula for sum of interior angles is (n-2)180. Since there are 7 sides, n-2 is 5.

5 x 180 = 900

Add all the angles given and subtract sum from 900 and you are left with 85 for the missing angle.

Answer: 12x^3−25x^2+9

^ are the exponents

Step-by-step explanation:

i think the answer is 3x^2-x