3 years ago

Please answer this!!

Mathematics

1 answer:

Reika [66]3 years ago

4 0

The second one is correct

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If 1/2x = a= 2/3y and x + y= na, what is the value of n?

Fynjy0 [20]

Answer:

Step-by-step explanation:

$\frac{1}{2} x=a=\frac{2}{3} y\\\frac{1}{2}x=a\\x=2a \\\frac{2}{3} y=a\\y=\frac{3}{2} a\\x+y=2a+\frac{3}{2} a=\frac{4a+3a}{2} =\frac{7}{2} a=na\\n=\frac{7}{2}$

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2 years ago

C. Brian saves some money from his allowance to buy Mother a gift. His daily allowance is P50.00

Finger [1]

Answer:

1.thursday

his expenses was p26.85

2.monday he spent p40.8

3.18.90+23.15+11.80+16.35+9.20=approximately p55.6×30 days=p1,668

4.693.80-1,668

so he savings is completely enough

8 0

1 year ago

Question 1 (1 point)

olya-2409 [2.1K]

For this case we can propose a system of equations:

x: Let the variable that represents the number of small cookies

y: Let the variable that represents the number of large cookies

According to the statement we have:

$x + y = 130\\2x + 3y = 310$

We multiply the first equation by -2:

$-2x-2y = -260$

We have the following equivalent system:

$-2x-2y = -260\\2x + 3y = 310$

We add the equations:

$-2x + 2x-2y + 3y = -260 + 310\\y = 50$

We look for the value of the variable "x":

$x = 130-y\\x = 130-50\\x = 80$

Answer:

They sold 80 small cookies and 50 large cookies

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3 years ago

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Liula [17]

The correct answer is 45 square yards.

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2 years ago

There are 2 times as many girls as boys in my class. There are a total of 22 students. How many more boys than girls are in the

mote1985 [20]

11 more boys than girls in your class

8 0

3 years ago