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3 years ago

Rina can blow up 6 balloons in 1 mintue. At this rate how many balloons can she blow up in 8 mintues?

Mathematics

2 answers:

ANEK [815]3 years ago

7 0

She can blow up 48 balloons in 8 minutes.

snow_tiger [21]3 years ago

7 0

She can blow up 48 balloons in 8 mins because you multiply 6 times 8 and get your answer.

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ill give brainliest!! Solve these equations for the variable. Check your solutions. please put the answers to this

yawa3891 [41]

Answer:

11. x=5

12. y= -1

13. m= -22

14. m=-4

15.n= 12, -4

16. x=6 ,-5

17. m=4

18. x= 3, -1

Step-by-step explanation:

I hope this help ;-)

8 0

2 years ago

100 yd equals how many in

horrorfan [7]

100 yd * 3ft/1 yd * 12 in /1ft

100*3*12 in

3600 in

8 0

3 years ago

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

3 years ago

Which graph shows data whose r-value is most likely closest to 1?

Aleks04 [339]

Answer:

B on ed 2020

Step-by-step explanation:

an r value of 1 would be a graph that has a linear line going up one then

to the right one so the closest to that is the 2nd graph (B)

4 0

3 years ago

Read 2 more answers

Work out the lengh of RS gue your answer to 3 significant figures

atroni [7]

Answer:

RS ≈ 5.83 units

Step-by-step explanation:

Calculate RS using the distance formula

d = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = R(- 3, 1) and (x₂, y₂ ) = S(2, 4)

RS = $\sqrt{(2+3)^2+(4-1)^2}$

= $\sqrt{5^2+3^2}$

= $\sqrt{25+9}$

= $\sqrt{34}$ ≈ 5.83 ( to 3 significant figures )

8 0

3 years ago