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3 years ago

JANITIA IS 15 YEARS OLD AND HER BROTHER IS 5 YEARS. WHAT IS THE RATIO OF JANTIA AGE TO HER BROTHER AGE

Mathematics

2 answers:

riadik2000 [5.3K]3 years ago

5 0

Answer:

3:1

Step-by-step explanation:

15:5 = 3:1

vlada-n [284]3 years ago

3 0

Answer:

3:1

Step-by-step explanation:

15:5

3:1

i think this is the answer

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ANSWER ASAP PLZ!!

Vikentia [17]

$\text{If is}\\\\\left\{\begin{array}{ccc}0.2-0.3y=4\\2.3x-y=1.2\end{array}$

Answer:

$\large\boxed{\left(-\dfrac{344}{69},\ -\dfrac{38}{3}\right)}$

Step-by-step explanation:

$\left\{\begin{array}{ccc}0.2-0.3y=4\\2.3x-y=1.2&\text{multiply both sides by (-0.3)}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}0.2-0.3y=4\\-0.69x+0.3y=-0.36\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad-0.69x+0.2=3.64\qquad\text{subtract 0.2 from both sides}\\.\qquad-0.69x=3.44\qquad\text{divide both sides by (-0.69)}\\.\qquad x=-\dfrac{3.44\cdot100}{0.69\cdot100}\\.\qquad \boxed{x=-\dfrac{344}{69}}\\\\\text{Calculate the value of y from first equation:}$

$0.2-0.3y=4\qquad\text{subtract 0.2 from both sides}\\-0.3y=3.8\qquad\text{divide both sides by (-0.3)}\\y=-\dfrac{3.8\cdot10}{0.3\cdot10}\\\boxed{y=-\dfrac{38}{3}}$

--------------------------------------------------------------------------

$\text{If is}\\\\\left\{\begin{array}{ccc}0,2x-0,3y=4\\2.3x-y=1.2\end{array}\right$

Answer:

$\large\boxed{\left(-\dfrac{52}{7},\ -\dfrac{128}{7}\right)}$

Step-by-step explanation:

$\left\{\begin{array}{ccc}0.2x-0.3y=4&\text{multiply both sides by 10}\\2.3x-y=1.2&\text{multiply both sides by 10}\end{array}\right\\\\\left\{\begin{array}{ccc}2x-3y=40&\text{multiply both sides by (-10)}\\23x-10y=12&\text{multiply both sides by 3}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}-20x+30y=-400\\69x-30y=36\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad49x=-364\qquad\text{divide both sides by 49}\\x=-\dfrac{364:7}{49:7}\\.\qquad\boxed{x=-\dfrac{52}{7}}$

$2\left(-\dfrac{52}{7}\right)-3y=40\\-\dfrac{104}{7}-3y=40\qquad\text{multiply both sides by 7}\\-104-21y=280\qquad\text{add 104 to both sides}\\-21y=384\qquad\text{divide both sides by (-21)}\\y=-\dfrac{384:3}{21:3}\\\boxed{y=-\dfrac{128}{7}}$

7 0

4 years ago

33.2 x21 area model and standard algorithm

Ad libitum [116K]

Answer:

697.2

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Please help- will give brainlist

marshall27 [118]

Answer:

m(JCA)

Step-by-step explanation:

C is the central angle here (the one in between)

so it will be m(JCA) or m(ACJ)

7 0

3 years ago

A florist is creating centerpieces for an upcoming event later this evening. She has already been working for two hours and has

Kobotan [32]

Answer:

No inequality given but in my view answer is:

x ≥ 16

Step-by-step explanation:

Given that:

Total time = 6 hours

Remaining Time = 6 - 2 hours = 4 hours (40*6 =240 mins)

Time required for 1 centerpiece = 15 mins

We have to find inequality for x:

Number of centerpieces she makes = x

In 240 mins : 240/15 centerpieces can be made

= 16 centerpieces

If she works with the same speed or more efficiently the suitable inequality would be:

x ≥ 16

I hope it will help you!

5 0

3 years ago

To find a baseball pitcher's earned run average (ERA), you can use the formula Ei=9r, where E represents ERA, i represents numbe

Lady bird [3.3K]

You have the formula
E i = 9 r
You can divide both sides by i and get
E = (9 r) / i
The formula is solved for e.

5 0

4 years ago

Read 2 more answers