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3 years ago

What do 2+2-4+10-9+1=

Mathematics

2 answers:

maria [59]3 years ago

7 0

Step-by-step explanation:

the answer is 2 it us the correct answer

anyone who wants to talk with me

nordsb [41]3 years ago

4 0

2+2-4+10-9+1=2

Step by step:

2+2-4+10-9+1

=4-4+10-9+1

=0+10-9+1

=10-9+1

=1+1

<em>Hence proved.</em>

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Y is inversely proportional to x.

Inessa [10]

Answer:

1. $xy = 63$

2. $y = 3$

Step-by-step explanation:

Given

Variation: inverse Proportion

y = 7, x = 9

Required

- Write an equation connecting y and x

- Find y when x = 21

Given that thee variation is inversely proportional;

This implies that

$y\ \alpha\ \frac{1}{x}$

Convert variation to equation

$y\ = \frac{k}{x}$ ----------- Equation 1

Where k is the constant of variation

Substitute 7 for y and 9 for x in equation 1

$7 = \frac{k}{9}$

Multiply both sides by 9

$9 * 7 = 9 * \frac{k}{9}$

$63 = k$

Substitute 63 for k in equation 1

$y = \frac{63}{x}$

Multiply both sides by x

$x * y = \frac{63}{x} * x$

$xy = 63$

Hence, the equation connecting x and y is $xy = 63$

Solving for when x = 21

Substitute 21 for x in the above equation

$21 * y = 63$

Divide both sides by 21

$\frac{21 * y}{21} = \frac{63}{21}$

$y = 3$

4 0

4 years ago

Find the slope of the line. Write your answer in simplest form.

Goshia [24]

Slope: (y2-y1)/(x2-x1)
Points given: (-4,1) and (1,-2)
(-2-1)/(1+4) = -3/5
Answer: the slope is -3/5

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3 years ago

A boy 1.6 m tall casts a 2.4 m shadow. How tall is a nearby streetlight that casts a 7.2 m shadow?

Oxana [17]

You basically need to set up a porporion:
1.6/2.4 = x/7.2
x=4.8

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3 years ago

I want the ans to this ques

fiasKO [112]

Answer:

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3 years ago

Alguien que me ayude con esto :(

NNADVOKAT [17]

Answer:

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Step-by-step explanation:

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3 years ago