Martin has 15 texts messages on his phone .Two thirds of them are from his sister how many texts does martin have from his sister? I need three different ways to calculate this answer?

Answers

Answer 1

Answer: 15/3=5. 5x2=10. 2/3=66.66%. 10%=1.5 5%=0.75 1%=0.15 0.66 rounds to 1 1.5x6=9. 9+0.76+1.5+1.5=10. 2:3=10:15.

Answer 2

Answer: Divide 15 by 3 and add that number to itself

Multiply 15 by (2/3) (don't forget parentheses if you are using a calculator)

Draw a pic and shade in two thirds

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////=shade in

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WHAT IS 4 TIMES TWO THIRDS IN A MIXED FRACTION

Answers

$(4)/(1)$ × $(2)/(3)$ = $(8)/(3)$
You then divide the numerator(top) by the denominator(bottom)
$(8)/(3)$ = $2 (2)/(3)$
Your answer is $2 (2)/(3)$

\frac{4}{1} × \frac{2}{3} = \frac{8}{3}You then divide the numerator(top) by the denominator(bottom)\frac{8}{3} =2 \frac{2}{3}Your answer is 2 \frac{2}{3}

Consider the system below. 4x-2y=-12 3x-y=-3 Solve the system by using a matrix equation. Show your work.

Answers

The matrix equation AX=B, where A and B are numerical matrices and X is unknown matrix has a solution $X= A^(-1) B$ , where $A^(-1)$ is inverse matrix of X.
1. We rewrite given system as matrix equation $\left[\begin{array}{cc}4&-2\n3&-1\end{array}\right] X=\left[\begin{array}{c}- 12\n- 3\end{array}\right]$ ;
2. Find $A^(-1) = \left[\begin{array}{cc}4&-2\n3&-1\end{array}\right] ^(-1)$ by the rule $A^(-1)= (1)/(det \ A) [ A_(ij) ] ^(T)$ . So, $det\ A=4$ × $(-1)-3$ × $(-2)=-4+6=2$ and algebraic supplements are
$A_(11) =-1 \n A_(12) =-3 \n A_(21)=2 \n A_(22) =4$ . Then $A^(-1) = (1)/(2) \left[\begin{array}{cc}-1&-3\n2&4\end{array}\right] ^(T)= \left[\begin{array}{cc}- (1)/(2) &1\n- (3)/(2) &2\end{array}\right]$ ;
3. Calculate $X= \left[\begin{array}{cc}- (1)/(2) &1\n- (3)/(2) &2\end{array}\right] \left[\begin{array}{c} -12\n-3\end{array}\right]=$ $\left[\begin{array}{c}3\n12\end{array}\right]$ ;

4. We obtain $X= \left[\begin{array}{c}3\n12\end{array}\right]$ , from where x=3 and y=12.

the distance around the lake is 0.75 mile.derek ran 0.8 of the distance on monday . how far did he run? the answer is 0.75 * 0.8 how much?Show your work.

Answers

Answer:

0.6 miles

Step-by-step explanation:

We are given that the distance around the lake is 0.75 miles

Derek ran on Monday=0.8 of the distance

We have to find that how far Derek run

0.8 of the distance= $0.8* 0.75$

0.8 of the distance=0.6 miles

Derek ran on Monday=0.6 miles

Hence, Derek run on Monday=0.6 miles

$0.75*0.8= (75)/(100) * (8)/(10) = (75*8)/(100*10) = (600)/(1000) = (6)/(10)=0.6$

Use any model you choose to solve the story problem.A dump truck driver created 3 equal mounds of dirt from 1/6 of his load.

What fraction of the entire load of dirt was in each mound?

A.1
-
18

B.1
-
2

C.2
-
1

D.18
-
1

Answers

into 3 parts meand sivided by 3 means times 1/3

1/6 divided into 3 parts means 1/6 times 1/3=1/18

1/18 was in each mound

A is answer

awnser is d.18 its the easiest thing ever

dominique drove home from work at an average speed of 36 miles per hour. if the distance from her house to her workplace is 5.4 miles, how long did her commute take?

Answers

Answer:

Dominique's commute took 9 minutes

Step-by-step explanation:

Great question, it is always good to ask away and get rid of any doubts that you may be having.

Since we are given 3 values with 1 variable, and this is a ratio problem we can use the Rule of Three technique to calculate how long her commute will take. The technique is shown in the picture attached below, but before we can use this technique we need to change the hours into minutes.

1 hour = 60 minutes

Now we can use the technique...

36 miles ⇒ 60 minutes

5.4 miles ⇒ x

$(5.4*60)/(36) = 9minutes$

Finally, we can see that it to Dominique's commute took 9 minutes.

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

Putting this into an equation would result:

5.4/x = 36

x = 5.4/36

x = .15 hour

.15 x 60 = 9 minutes

9 minutes is the answer

Lana earned $49 dollars on Friday, $42 on Saturday, and $21 on Sunday selling bracelets. she sold each bracelets for the same amount. What is the most she could have charged for each bracelet?

Answers

I believe 7, but I could be wrong.

Final answer:

The most Lana could have charged for each bracelet is $49, assuming she sold one bracelet per day.

Explanation:

Lana earned money over the weekend by selling bracelets. She earned $49 on Friday, $42 on Saturday, and $21 on Sunday. To find the most she could have charged for each bracelet, we should make the assumption that she only sold one bracelet per day, as that would mean she would be earning the maximum per bracelet. Therefore, the most she could have potentially charged for each bracelet would be the highest amount she earned in a day, which was $49.

Learn more about Problem Solving here:

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