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3 years ago

I need a lot of help with my class work

Mathematics

2 answers:

malfutka [58]3 years ago

3 0

What do you need it rounded to?

Sholpan [36]3 years ago

3 0

9.) 0.56

10) 0.25

11.) 0.35

12.) 0,04

13.) 0.9

14.) 0.36

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The sum of two numbers is -80. One number is 3 times the other number. Find the numbers.

Alborosie

A) x + y = -80
B) 3x = y

x + 3x = -80
4x = -80
x = -20
y = -60

7 0

3 years ago

Match each description when z = 9 + 3i.

VladimirAG [237]

Real part of z = 9
Imaginary Part = 3i
Conjugate of z is 9 - 3i

7 0

3 years ago

Read 2 more answers

In the diagram, angle abc is a right angle. Find the value of x<br><br> Show full working out pls ty

Vladimir79 [104]

Answer:

x = 3.75

Step-by-step explanation:

ABC is a right angled triangle.

Therefore, by Pythagoras theorem:

${(10 - x)}^{2} = {x}^{2} + {5}^{2} \\ 100 - 20x + {x}^{2} = {x}^{2} + 25 \\ 100 - 20x = 25 \\ - 20x = 25 - 100 \\ - 20x = - 75 \\ x = \frac{ - 75}{ - 20} \\ \: \: \huge \red { \boxed{x = 3.75}}$

5 0

3 years ago

State the commutative property of addition using the variables a and b.

Verdich [7]

Answer:

a+b=b+a

Step-by-step explanation:

so 7+4=12 and 4+7=12 so addition is commutative

7 0

4 years ago

Read 2 more answers

The solution to a system of linear equations is (-3,-3) Which system of linear equations has this point as its solution? x -5y=-

Ann [662]

Answer:

$x-5y=12$ and $3x+2y=-15$

Step-by-step explanation:

The first system is

$x-5y=-12$ and $3x+2y=-15$

We substitute x=-3 and y=-3

$-3-5*-3=12\ne-12$ and $3*-3+2*-3=-15$

Both equations are not satisfied

The next system is

$x-5y=12$ and $3x+2y=-15$

We substitute x=-3 and y=-3

$-3-5*-3=12$ and $3*-3+2*-3=-15\ne15$

Both equations are satisfied

The next system is

$x-5y=-12$ and $3x+2y=15$

We substitute x=-3 and y=-3

$-3-5*-3=12\ne12$ and $3*-3+2*-3=-15$

Both equations are not satisfied

The next system is

$x-5y=12$ and $3x+2y=15$

We substitute x=-3 and y=-3

$-3-5*-3=12\ne-12$ and $3*-3+2*-3=-15$

Both equations are not satisfied

6 0

4 years ago