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aleksklad [387]
4 years ago
11

What is 3x - y = 17 x + y = -5

Mathematics
1 answer:
Virty [35]4 years ago
3 0

Answer:

{x,y}={6,1}

Step-by-step explanation:

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Mark works 24 hours a week and earns £11.63.
KiRa [710]

Weekly pay = amount per hour x number of hours:

24 x 11.63 = 279.12

Annual salary = weekly pay x 52 weeks:

279.12 x 52 = 14,514.24

5 0
3 years ago
Is 2.4, 4.5 and 5.2 a right triangle?
grandymaker [24]

Answer:

No

Step-by-step explanation:

Use the pythagorian theorm to find whether it's a right triangle or not.

So the hyp will be the largest number. And the hyp must be equal to the sum of b and c squared

5.2 squared= 2.4 squared+ 4m5 squared

27.04= 26.01

It's not equal so the triangle isn't a right triangle.

3 0
2 years ago
Given: a and b are parallel and c is a transversal.
Vedmedyk [2.9K]

The missing words to complete the proof are respectively; Vertical Angles; Corresponding angles; Transitive Property

<h3>How to prove congruent angles?</h3>

The image of the transversal line is attached.

1) We know that lines a and b are parallel and that line c is a transversal because that is given.

2) We can tell that angles 2 and 5 are congruent because vertical angles are congruent.

3) Angles 5 and 7 are congruent because corresponding angles by parallel lines cut by a transversal are congruent.

4) Therefore, angles 2 and 7 are congruent based on the transitive property.

Read more about Congruent Angles at; brainly.com/question/1675117

#SPJ1

3 0
2 years ago
The length of a rectangle is 2 units more than the width. The area of the rectangle is 63 units. What is the length, in units, o
Keith_Richards [23]

Answer:

Length = 9units

Width = 7units

Step-by-step explanation:

It is said that the length is 2units more than the width

Assume that the width is x, then the length will be 2 + x

ie

Width = x

Length = 2 + x

Area of the rectangle = 63units

Area of rectangle = l * b

l - length of the rectangle

b - width of the rectangle

A = l * b

63 = (2 + x) * x

63 = ( 2 + x) x

63 = 2x + x^2

Let's rearrange it

x^2 + 2x - 63 = 0

Let's find the factor of 63

A factor that can be multiplied to give -63 and that can be added to give +2

Let's use -7 and +9

x^2 - 7x + 9x - 63 = 0

Separate with brackets

( x^2 - 7x) + ( 9x - 63) = 0

x( x - 7) + 9(x - 7) = 0

( x + 9)(x - 7) = 0

( x + 9) = 0

( x - 7) = 0

x + 9 = 0

x = -9

x - 7 = 0

x = 7

Note: the length of a rectangle can not be negative

So therefore,

x = 7

Length = 2 + x

= 2 + 7

= 9units

Width = x

= 7units

7 0
3 years ago
Plot -1 + i in the complex plane
Masteriza [31]
In the complex plane, the point (a,b) corresponds to the complex number a+bi. So this means the number -1+i can be represented by the point (-1,1).
6 0
3 years ago
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