The 7th grade has 220 students. Three-fifths of the students are girls. How many boys are in the 7th grade?

I would say that the tree is 12 feet high.

And to find out the answer you could use the quadratic formula :)

Answer:

The numbers are 9 + 11 + 13 + 15.

Step-by-step explanation: The equation for this is simple.

Take x as the smallest number of the 4 numbers. The second number would be x +2, third number is x+4, and the fourth number is x+6. you add these together, and you get: 4x +12 = 48, you then solve this as a linear equation. 48-12 = 36. Then you divide by 4, which gives you 9 as the smallest number of the 4 numbers. Remember that the second number is  9+2=11, third is 9+4=13, and the fourth is 9+6=15. If you add these together you get 9+11+13+15=48.

Answer:

Let

the breadth =x

the length =6x

As we know that in a rectangle

[tex]{\boxed{\sf Area=lb}}[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf x\times 6x=160 [/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf 6x^2=160[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf x^2={\dfrac {160}{6}}[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf x^2=26.6 [/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf x=\sqrt {26.6}[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf x=5.1yards[/tex]

Answer:

1) sample space = {HHH, HHT, HTH, THH, THT, TTH, HTT, TTT}

2) pr(tossing heads exactly twice) = [tex]\frac{3}{8}[/tex]

3) pr(tossing tails at least twice) = [tex]\frac{1}{2}[/tex]

Step-by-step explanation:

In tossing a coin three times, the sample space is the possible outcomes for the number of toss.

So that for the question,

1) The sample space = {HHH, HHT, HTH, THH, THT, TTH, HTT, TTT}

The total number of possible outcome is 8.

2) pr(tossing heads exactly twice) = [tex]\frac{numner of outcome with exactly two heads}{total number of outcome}[/tex]

                                                            = [tex]\frac{3}{8}[/tex]

3) pr(tossing tails at least twice) = [tex]\frac{number of outcome with at least two tails}{total number of outcome}[/tex]

                                                     = [tex]\frac{4}{8}[/tex]

                                                     = [tex]\frac{1}{2}[/tex]

you good itStep-by-step explanation:

Answer: D

Step-by-step explanation:

Answer:

if you need anything else just comment

Step-by-step explanation:

4k <_ 4 = numerical form

4k/4 <_ 4/4

k <_ 1 = work to solve

on number line there is 0,1,2. 1 has a circle that is filled in and arrow pointing towards 0. = graphed on number line

set notation = {k(vertical bar)k<_1}

interval notation = (-infinity, 1]

Answer:

(10 - x + y) units

Step-by-step explanation:

Perimeter of the triangle = (3 - 2x + x + 7 + y) units = (10 - x + y) units

If you wish to venture further into mathematics (aka other topics), you may want to follow my Instagram account (learntionary), where I post some of my own notes on certain topics and also some tips that may be useful to you :)

Answer:

Step-by-step explanation:

There are 3 critical points. Place them on the graph and go down (using a ruler and pencil).

-7, -5 trans forms into 7, -5

-4, -2 transforms into 4,-2

4, -4 transforms into -4, -4

Answer:

1. Yes 2. No 3. Yes 4. No

Step-by-step explanation: 1 is a function because none of the x values repeat, 2 isn't a function because in the x coordinates, -2 repeats, 3 is a function because if you were to draw a (vertical) line through each point, none of them have two points on one line, 4 is a function because none of the x coordinates point to more than one y coordinate

Answer:

Step-by-step explanation:

Translation down and to the right doesn't change the dimensions of the original figure.

This will change coordinates of each vertex but the highest coordinates of the pre-image and image will correspond to each other.

Answer:

The answer is 60

Step-by-step explanation:

all you have to do is reverse the operation, you have to do 9 x 5 then add 15 to that result and you will get the answer :)

hope this helps!

Answer:

0.630901 liters per second

Step-by-step explanation:

Hope this helped!

Answer:

The margin of error is  [tex]E = 0.4606 [/tex]      

Step-by-step explanation:

From the question we are told that

   The sample size is  n = 100

    The sample mean is  [tex]\= x = 12.5 \ years[/tex]

    The standard deviation is  [tex]\sigma = 2.8 \ years[/tex]

From the question we are told the confidence level is  90% , hence the level of significance is    

      [tex]\alpha = (100 - 90 ) \%[/tex]

=>   [tex]\alpha = 0.10[/tex]

Generally from the normal distribution table the critical value  of  [tex]\frac{\alpha }{2}[/tex] is  

   [tex]Z_{\frac{\alpha }{2} } =  1.645[/tex]

Generally the margin of error is mathematically represented as  

      [tex]E = Z_{\frac{\alpha }{2} } *  \frac{\sigma }{\sqrt{n} }[/tex]

=>   [tex]E =1.645*  \frac{ 2.8 }{\sqrt{100} }[/tex]

=>   [tex]E = 0.4606 [/tex]      

Answer:

I don't know "how many pounds total does his idea weights" but the stuff he purchased weights 10 pounds.

Answer:

yes it is a function

Step-by-step explanation:

Answer:

An extraneous solution is a root of a transformed equation that is not a root of the original equation because it was excluded from the domain of the original equation. Example 1: Solve for x , 1x − 2+1x + 2=4(x − 2)(x + 2) .

Answer:

y=(x-8)^2-71

i believe thats the correct answer

Answer:

each tire was 68 dollars

Step-by-step explanation:

hope this helps :)

The answer is 68 because 68 x 4 is 272 .

Answer:

The depth is 127 inches.

Step-by-step explanation:

The stairway and its depth can be compared to a right angled triangle. Let the depth be represented by d.

But,

12 inches = 1 foot

20 ft 6 in = 20 + [tex](\frac{6}{12} )[/tex]

               = 20.5 feet

So that applying the appropriate trigonometric function, we have;

Sin θ = [tex]\frac{opposite}{hypotenuse}[/tex]

Sin 31º = [tex]\frac{d}{20.5}[/tex]

d = 20.5 x Sin 31º

   = 20.5 x 0.5150

d = 10.5575

d ≅ 11 feet

Therefore,

d = 10.5575 feet = (10.5575 x 12) inches

  = 126.69 inches

The depth is 127 inches.

Answer:

After using distributive property to remove the parentheses [tex]10(u-2)[/tex]  we get [tex]10u-20[/tex]

Step-by-step explanation:

We need to use distributive property to remove the parentheses 10(u-2)

According to distributive property of multiplication over subtraction: [tex]a(b-c)=ab-ac[/tex]

Using the above distributive property to solve the question. Multiply 10 with terms inside the bracket and solving:

[tex]10(u-2)\\=10u-10*2\\=10u-20[/tex]

So, After using distributive property to remove the parentheses [tex]10(u-2)[/tex]  we get [tex]10u-20[/tex]

Answer:

true then false is the anwer

Answer:

-169

Step-by-step explanation:

An Arithmetic Combination states that  two functions f and g at any x i.e in the domain of both f and g, with one exception.

The quotient  is not defined at values of x, where g is equal to 0 or we can say that both the functions must be defined at a point for the combination to be defined.

Given: f(x) = 3-2x and g(x) =  

Then, using arithmetic combination of function definition:

                ......[1]

Now, first find the value of f(9) and g(8) ;

f(8) =3-2(8) = 3-16 = -13 and

Substitute these in equation [1] ;

Therefore, the value of (f/g)(8) is; -169

Answer:

2 is 17.5

Step-by-step explanation:

bc the half of 4 is 2 since 4 is 35 we have to find the half of 35 and how we do that is by dividing it by 2.

35%2=17.5 so 2 is equal 17.5 so <2 is 17.5

Answer:

I'm gonna get more people here

Answer:

50 hz  yw pplz

Step-by-step explanation:

Answer:

26.83inches

Step-by-step explanation:

Area of the square mirror is expressed as A = L²

L is the side length of the square mirror

Given

Area = 720in²

Get the length

720 = L²

L = √720

L = 26.83

Hence the length of wood trim needed to go around the entire mirror is 26.83inches

Answer:

Heidi wants to compute:

17 - 9.

First, she adds to get 10, (we want to subtract 10, this is easier than subtracting 9) then she can do:

17 - 9 + 0

adding zero does not change the sum

1 - 1 = 0

then:

17 - 9 + 0 = 17 - 9 + 1 - 1

Now we can do:

17 - 9 - 1 + 1

17 - (9 + 1) + 1

17 - 10 + 1

(17 - 10) + 1

7 + 1 = 8

Then, first she needs to add -1, in order to subtract 10, and then she must add 1. As we added a number and its inverse, in total we added zero, so the sum did not change, but was easier to compute.

Then, you need