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2 years ago

The ratio of boys to girls in the sixth grade is 2:3

Mathematics

1 answer:

Ira Lisetskai [31]2 years ago

7 0

Answer:

3*16=48 girls (further explination below)

Step-by-step explanation:

80/(2+3)=16, so since 3 in the ratio is for girls, there are 3*16=48 girls.

This is my first time answering :) your welcome

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Roller coaster crew ray

andrey2020 [161]

What does that even mean?

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2 years ago

5x=4y+8 3y=3x-3 using elimination

suter [353]

Let's rewrite the equation with x and y on the left side of the equal sign.
5x-4y=8 --------(1)
3x-3y=3---------(2)
Divide equation (2) by 3,
x - y= 1
now we have,
5x-4y = 8 --------(1)
x - y = 1 ---------(2)
To eliminate x, multiply equation (2) by 5. This makes both the coefficients of x to be 5. Subtract the second equation from the first equation.
5x - 4y = 8
(2) * 5 5x - 5y = 5
(-) (+) (-)
----------------
0x +y =3
Therefore, y=3
Substitute the value of y, in any one of the two equations. Let's substitute y in the second equation.
x-3=1
x=4
x=4 and y=3

8 0

3 years ago

Five years ago mean age of a family was 25 years. What is the present mean age of the family?

Anit [1.1K]

Answer:

The mean depends on the no. of family members but the question hasn't mentioned it. So I have no idea what to do with this.

7 0

2 years ago

Determine the quotient and the remainder in the division <br> (4x^4 - 1 ) ÷ x + 1

EastWind [94]

(4x^4-1)÷x+1

(256x-1)÷x+1

256-1+1

256

The first step shows the problem

The second step powers 4x 4 times

The third step removes x

The 4th step shows the problem after x is removed.

The 5th step is the answer: 256

7 0

3 years ago

On a very cold morning, it was -7°F. As the day went on, the temperature rose 3 degrees each hour. Which equation shows the temp

wariber [46]

Answer:

The equation shows the temperature over time will be:

$y = 3x - 7$

Hence, option (C) is correct.

Step-by-step explanation:

We know that the slope-intercept form of the line equation is

$y=mx+b$

where m is the rate of change or slope and b is the y-intercept

Let 'y' be the temperature

Let 'x' be the time in the hour

Given that one very cold morning, it was -7°F.

Thus, the y-intercept = b = -7

Given that as the day went on, the temperature rose 3 degrees each hour.

Thus, the rate of change = slope = m = 3

Thus, substituting m = 3 and b = -7 in the equation

$y = mx+b$

$y = 3x + (-7)$

$y = 3x - 7$

Therefore, the equation shows the temperature over time will be:

$y = 3x - 7$

Hence, option (C) is correct.

3 0

3 years ago