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3 years ago

I need help with this can you plz help me plz help me badly I need your help plz help me ASAP

Mathematics

1 answer:

Reika [66]3 years ago

5 0

Answer:

A 20.8 cm

Step-by-step explanation:

The perimeter of a rectangle is

P = 2(l+w)

We know the length is 8cm and the width is 24mm

The need to be the same units to add them together

Change 24 mm * 1cm/10 mm = 2.4 cm

Substitute 8 cm for l and 2.4 cm for w

P = 2(8+2.4)

P = 2 (10.4)

P = 20.8 cm

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MATH HELP

elena-s [515]

The equation of line perpendicular to given line is:

$y = \frac{2}{3}x-1$

Step-by-step explanation:

Given equation is:

$3x+2y = -8$

First of all, we have to find the slope of the given line

So,

$3x+2y = -8\\2y = -3x-8\\$

Dividing both sides by 2

$\frac{2y}{2} = \frac{-3x-8}{2}\\y = \frac{-3x}{2} - \frac{8}{2}\\y =-\frac{3}{2}x-4$

As the equation is in slope-intercept form, the co-efficient of x will be the slope of the line

$m_1 = -\frac{3}{2}$

As we know that product of slopes of two perpendicular lines is -1

Let m-2 be the slope of line perpendicular to given line

$m_1.m_2 = -1\\-\frac{3}{2} . m_2 = -1\\m_2 = -1 * -\frac{2}{3}\\m_2 = \frac{2}{3}$

Slope-intercept form is:

$y = m_2x+b$

putting the value of the slope

$y = \frac{2}{3}x+b$

Putting the point (3,1) in the equation

$1 = \frac{2}{3}(3) +b\\1 = 2 + b\\b = 1-2\\b = -1$

Putting the value of b

$y = \frac{2}{3}x-1$

Hence,

The equation of line perpendicular to given line is:

$y = \frac{2}{3}x-1$

Keywords: Slope-intercept form, slope

Learn more about equation of line at:

#LearnwithBrainly

8 0

3 years ago

Need help asap will give brainly

Alexandra [31]

Answer:

Its H or J

I Would go with J tho...

not all the way sure

3 0

3 years ago

Can someone help me

Naily [24]

Answer:

Option e is correct one

e. Neither similar nor congruent

Because it has nothing similar neither side and nor angles

If you are helped with my answer pls tag me brianliest I really want it... Plzz

THANK YOU........

7 0

2 years ago

Write the phrase as an expression. The product of number h and 3

alexandr1967 [171]

Answer: 3h

Explanation: Product = Multiplication
Number 1 = ?
Number 2 = 3

8 0

2 years ago

Who can help me on this ?

Anna [14]

Answer: 3

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers