1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
liq [111]
3 years ago
11

I'm so confused, how do you do this ;-;

Mathematics
1 answer:
adell [148]3 years ago
3 0

Answer:

1. 12 m

2. 15.2 ft

3. 22 km

4. 10 ft

Step-by-step explanation:

Diameter is the radius multiplied by itself to find the entire length of a circle

You might be interested in
Evaluate the expression when y=-7.<br> y? +4y-1
Delicious77 [7]

Answer:

20

Step-by-step explanation:

y^2+4y-1=(-7)^2+4(-7)-1=(-7)(-7)-28-1=49-28-1=21-1=20

5 0
3 years ago
What is the row echelon form of this matrix?
USPshnik [31]

The row echelon form of the matrix is presented as follows;

\begin{bmatrix}1 &-2  &-5  \\ 0& 1 &  -7\\ 0&0  &1  \\\end{bmatrix}

<h3>What is the row echelon form of a matrix?</h3>

The row echelon form of a matrix has the rows consisting entirely of zeros at the bottom, and the first entry of a row that is not entirely zero is a one.

The given matrix is presented as follows;

\begin{bmatrix}-3 &6  &15  \\ 2& -6 &  4\\ 1&0  &-1  \\\end{bmatrix}

The conditions of a matrix in the row echelon form are as follows;

  1. There are row having nonzero entries above the zero rows.
  2. The first nonzero entry in a nonzero row is a one.
  3. The location of the leading one in a nonzero row is to the left of the leading one in the next lower rows.

Dividing Row 1 by -3 gives:

\begin{bmatrix}1 &-2  &-5  \\ 2& -6 &  4\\ 1&0  &-1  \\\end{bmatrix}

Multiplying Row 1 by 2 and subtracting the result from Row 2 gives;

\begin{bmatrix}1 &-2  &-5  \\ 0& -2 &  14\\ 1&0  &-1  \\\end{bmatrix}

Subtracting Row 1 from Row 3 gives;

\begin{bmatrix}1 &-2  &-5  \\ 0& -2 &  14\\ 0&2  &4  \\\end{bmatrix}

Adding Row 2 to Row 3 gives;

\begin{bmatrix}1 &-2  &-5  \\ 0& -2 &  14\\ 0&0  &18  \\\end{bmatrix}

Dividing Row 2 by -2, and Row 3 by 18 gives;

\begin{bmatrix}1 &-2  &-5  \\ 0& 1 &  -7\\ 0&0  &1  \\\end{bmatrix}

The above matrix is in the row echelon form

Learn more about the row echelon form here:

brainly.com/question/14721322

#SPJ1

8 0
1 year ago
A tree that is 4 ft tall is growing at a rate of 1 ft each year a tree that is 12 feet tall is growing at a rate of 1/2 ft each
Andreyy89

Answer:

16 years

Step-by-step explanation:

Given data

For the first tree

let the expression for the height be

y=4+x--------------1

where y= the total height

          4= the initial height

          x= the number of years

For the second tree, the expression is

y=12+0.5x-------------2

Equate 1 and 2

4+x=12+0.5x

x-0.5x=12-4

0.5x= 8

x= 8/0.5

x=16

Hence it will take 16 years for both trees to have the same height

5 0
3 years ago
What is the solution to 2/3a - 1/6 = 1/3
konstantin123 [22]
The solution would be: a = 3/4
4 0
3 years ago
Read 2 more answers
Need help figuring out this problem!
JulijaS [17]
6[13-2(4+1)]

Solve what is in the bracket first.
Parenthesis first.

6[13-8-2]
6(3)
18


7 0
3 years ago
Other questions:
  • 6. Marina makes tablecloths. Each
    8·2 answers
  • Which graph represent function of f(x) = 4x^2- 4x- 8/ 2x+2
    13·2 answers
  • Which statements are true about the process for adding and subtracting the rational expressions? Check all that apply. The expre
    12·1 answer
  • In a science class of twenty-eight students. 12 boys and girls. On a unit test, 4 boys and 10 girls made an A grade. A student i
    14·1 answer
  • What is the value of the expression when d=3. 7d²+10 (answer choice A.63 B.52 C.31 D.73 )
    10·2 answers
  • The store sells walnuts for $2.95 per pound. Corey bought 2.4 pounds of walnuts. Before tax, how much will the walnuts cost?
    6·2 answers
  • What is the sum of 10/12and 11/12? Make sure to show all work to receive full credit!
    11·1 answer
  • Change the following decimal to a fraction. Express your answer like the following example (ex: 9.5 = 9 1/2) 4.125 = ?
    10·2 answers
  • Can someone answer this question please
    8·1 answer
  • From the sample space S​={1,2,3,4,...,15} a single number is to be selected at random. Given the following​ events, find the ind
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!