All categories

3 years ago

Petra jogs 2 miles in 22 minutes. At this rate, how long would it take her to jog 11 miles?

Mathematics

2 answers:

zmey [24]3 years ago

8 0

Answer:

11 minute

Step-by-step explanation:

22 min/2 miles

11 min/ 1 mile

zavuch27 [327]3 years ago

4 0

22 minutes ÷2=11 minutes for 1 mile

11 ×11=121 for 11 miles

You might be interested in

Why is it important to line up the digits in each place value position when subtracting?

Aleksandr [31]

It would not make sense if you were to do
34
28
The right way is

34
28

Another example is that if you were to subtract by 1 digit by 2

78
1

This is the wrong one

78
1

5 0

3 years ago

Read 2 more answers

Find the? inverse, if it? exists, for the given matrix.<br><br> [4 3]<br><br> [3 6]

True [87]

Answer:

Therefore, the inverse of given matrix is

$=\begin{pmatrix}\frac{2}{5}&-\frac{1}{5}\\ -\frac{1}{5}&\frac{4}{15}\end{pmatrix}$

Step-by-step explanation:

The inverse of a square matrix $A$ is $A^{-1}$ such that

$A A^{-1}=I$ where I is the identity matrix.

Consider, $A = \left[\begin{array}{ccc}4&3\\3&6\end{array}\right]$

$\mathrm{Matrix\:can\:only\:be\:inverted\:if\:it\:is\:non-singular,\:that\:is:}$

$\det \begin{pmatrix}4&3 \\3&6\end{pmatrix}\ne 0$

$\mathrm{Find\:2x2\:matrix\:inverse\:according\:to\:the\:formula}:\quad \begin{pmatrix}a\:&\:b\:\\ c\:&\:d\:\end{pmatrix}^{-1}=\frac{1}{\det \begin{pmatrix}a\:&\:b\:\\ c\:&\:d\:\end{pmatrix}}\begin{pmatrix}d\:&\:-b\:\\ -c\:&\:a\:\end{pmatrix}$

$=\frac{1}{\det \begin{pmatrix}4&3\\ 3&6\end{pmatrix}}\begin{pmatrix}6&-3\\ -3&4\end{pmatrix}$

$\mathrm{Find\:the\:matrix\:determinant\:according\:to\:formula}:\quad \det \begin{pmatrix}a\:&\:b\:\\ c\:&\:d\:\end{pmatrix}\:=\:ad-bc$

$4\cdot \:6-3\cdot \:3=15$

$=\frac{1}{15}\begin{pmatrix}6&-3\\ -3&4\end{pmatrix}$

$=\begin{pmatrix}\frac{2}{5}&-\frac{1}{5}\\ -\frac{1}{5}&\frac{4}{15}\end{pmatrix}$

Therefore, the inverse of given matrix is

$=\begin{pmatrix}\frac{2}{5}&-\frac{1}{5}\\ -\frac{1}{5}&\frac{4}{15}\end{pmatrix}$

4 0

4 years ago

Topics in math question

Monica [59]

Answer:24

Step-by-step explanation:

5 0

3 years ago

I NEED HELP PLEASE ASAP!!!!!!!!!!

Kitty [74]

$P(A|B)=\dfrac{P(A\cap B)}{P(B)}\\\\
P(A|B)=\dfrac{\dfrac{3}{4}}{\dfrac{4}{5}}\\\\
P(A|B)=\dfrac{3}{4}\cdot\dfrac{5}{4}\\\\
P(A|B)=\dfrac{15}{16}$

4 0

3 years ago

URGENT i need the answer for number 23 tyyyy

kupik [55]

No your friend I’d not correct although the slope is 4, the y-intercept is -3 because of the minus 3 in the equation.

4 0

3 years ago

Read 2 more answers