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2 years ago

Just question number one is good the second one could do if u feel like it

Mathematics

1 answer:

Fudgin [204]2 years ago

3 0

Answer:

1. n = 2

2. -4 = r

Step-by-step explanation:

-n - 7n = -16

subtract the like terms, like terms are terms that have the same variable or power. Ex: n and 7n are like terms as they both have n, however 7n and 16 are not. x^2 and x are not like terms as they do not have the same power so:

-8n = -16

divide both sides by -8

n = 2

-20 = 3r + 2r

add like terms

-20 = 5r

divide 5 from both sides

-4 = r

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lord [1]

Answer:the answer is D

Step-by-step explanation:

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2 years ago

On a piece of paper, use a protractor to construct △ABC with m∠A=30° , m∠B=60° , and m∠C=90° .

pochemuha

Answer:

It's a right triangle.

Step-by-step explanation:

△ABC with m∠A=30° , m∠B=60° , and m∠C=90°

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2 years ago

6 cm What is the area of this shape? 5 cm 8 cm

erica [24]

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2 years ago

Solve x2 + 1/2x +1/16=4/9

kolezko [41]

Answer:

x = 0.417 or x = -0.917

Step-by-step explanation:

We are given the following expression and we are to solve it for the variable x:

$x ^2 + \frac { 1 } { 2 } x + \frac { 1 } { 1 6 } = \frac { 4 } { 9 }$

We will find the least common multiple of 2. 6 and 9:

$x^2 \times 144 +\frac{1}{2}x \times 144 +\frac{1}{16} \times 144 = \frac{4}{9} \times 144$

Simplifying it to get:

$144x^2+72x+9=64$

$144x^2+72x+9-64=0$

$144x^2+72x-55=0$

Using the quadratic formula to solve for x:

$x=\frac{-b \pm\sqrt{b^2-4ac} }{2a}$

$x=\frac{-72 \pm\sqrt{72^2-4(144)(-55)} }{2a}$

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3 years ago

IF YOU KNKW ABOUT THIS PLEASE HELP .... What is the volume of the cone shown below?

bazaltina [42]

Answer:

A. 300π units³

Step-by-step explanation:

Formula for volume of a cone = ⅓πr²h

Where,

radius (r) = ½(10) = 5 units

height (h) = 36 units

Plug in the values and find the volume in terms of π

Volume of the cone = ⅓*π*5²*36

Volume of the cone = 300π units³

6 0

2 years ago

Just question number one is good the second one could do if u feel like it​

Just question number one is good the second one could do if u feel like it