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2 years ago

What dose "{" mean in algebra? Ex. {4y-2x-8 {5x-4y=20

Mathematics

1 answer:

GaryK [48]2 years ago

4 0

Answer:

System of Equations

Step-by-step explanation:

A system of equations refers to a number of equations with an equal number of variables. We will only look at the case of two linear equations in two unknowns. The bracket on the left indicates that the two equations are intended to be solved simultaneously, but it is not always used.

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Pencils cost 25p each. Mr smith spends £15 on pencils. Work out the number of pencils he gets.

marshall27 [118]

Answer:

Step-by-step explanation:

7 0

3 years ago

When a constant force acts upon an object, the acceleration of the object varies inversely with its mass. When a certain constan

vitfil [10]

Answer:

$a = 6m/s^2$

Step-by-step explanation:

Given

When mass = 4kg; Acceleration = 15m/s²

Required

Determine the acceleration when mass = 10kg, provided force is constant;

Represent mass with m and acceleration with a

The question says there's an inverse variation between acceleration and mass; This is represented as thus;

$a\ \alpha\ \frac{1}{m}$

Convert variation to equality

$a = \frac{F}{m}$ ; Where F is the constant of variation (Force)

Make F the subject of formula;

$F = ma$

When mass = 4kg; Acceleration = 15m/s²

$F = 4 * 15$

$F = 60N$

When mass = 10kg; Substitute 60 for Force

$F = ma$

$60 = 10 * a$

$60 = 10a$

Divide both sides by 10

$\frac{60}{10} = \frac{10a}{10}$

$a = 6m/s^2$

<em>Hence, the acceleration is </em> $a = 6m/s^2$ <em />

4 0

3 years ago

Jeans are on sale for 20% off the regular price. Which function would give you the total cost for purchasing a pair of jeans tha

Natalka [10]

The answer is f(x)=x-0.2x

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2 years ago

Order each set of numbers from least to greatest {7 , 9 √50, √85

Oksi-84 [34.3K]

Answer:

7,√50,9,√85

Step-by-step explanation:

The square root of 50 is 7.071 if you round to the nearest thousandth. The square root of 85 is 9.220. From least to greatest is 7,√50,9,√85

8 0

3 years ago

HELPPPPPPPPPPPPPPPPPPP PLEASEEEE

Softa [21]

So half of Nina's age is 10/2= 5. And since Greg is three years younger we subtract from 5 like so...
10/2=5
5-3
2
So Greg is 2 years old. I hope this helps love! :)

5 0

3 years ago

Read 2 more answers