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Sindrei [870]
2 years ago
10

Work out the number of boys and girls in each class below.

Mathematics
1 answer:
Brums [2.3K]2 years ago
8 0

Answer:

Work out the number of boys and girls in each class below.

In class 8T, there are 9 boys.

The ratio of boys to girls is 1:2

Number of boys Number of girls = it's 0

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D=6cm<br> h=8cm<br> volume of a cylinder?
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Answer:

226.224 cm^3

Step-by-step explanation:

Formula :

\pi r ^{2} h

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\pi \times 3 ^{2}  \times 8

= 226.224cm ^{3}

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3X -7 =44 solve for X
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Find the equation of the line which passes through the point (7,2) and is perpendicular to y=5x-2
MariettaO [177]

Answer:

\displaystyle y=-\frac{1}{5}x+\frac{17}{5}

Step-by-step explanation:

<u>Equation of a line</u>

A line can be represented by an equation of the form

y=mx+b

Where x is the independent variable, m is the slope of the line, b is the y-intercept and y is the dependent variable.

We need to find the equation of the line passing through the point (7,2) and is perpendicular to the line y=5x-2.

Two lines with slopes m1 and m2 are perpendicular if:

m_1.m_2=-1

The given line has a slope m1=5, thus the slope of our required line is:

\displaystyle m_2=-\frac{1}{m_1}=-\frac{1}{5}

The equation of the line now can be expressed as:

\displaystyle y=-\frac{1}{5}x+b

We need to find the value of b, which can be done by using the point (7,2):

\displaystyle 2=-\frac{1}{5}*7+b

Operating:

\displaystyle 2=-\frac{7}{5}+b

Multiplying by 5:

10=-7+5b

Operating:

10+7=5b

Solving for b:

\displaystyle b=\frac{17}{5}

The equation of the line is:

\boxed{\displaystyle y=-\frac{1}{5}x+\frac{17}{5}}

7 0
3 years ago
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