2 years ago

Use a number line to add 3 + (–5).

Mathematics

2 answers:

Sonja [21]2 years ago

8 0

Answer:

3 plus -5 means you go backwards from +3 to -2 thats your answer

Step-by-step explanation:

Leni [432]2 years ago

5 0

Answer:

-2

Step-by-step explanation:

3-5=-2

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2. Solve the following system. Show all your work. {3x - 2y + 2z = 30 {-x + 3y - 4z = -33 {2x - 4y + 3z = 42

Semmy [17]

From the system of equations, we have 3 unknowns and 3 equations. Therefore, it can be solved.

3x - 2y + 2z = 30 (1)
-x + 3y - 4z = -33 (2)
2x - 4y + 3z = 42 (3)

We can write equation 2 x as a function of y and z and substitute the new equation to the other equations.
x =3y - 4z + 33 (2)

3 (3y - 4z + 3) - 2y + 2z = 30 (1)
2 (3y - 4z + 3) - 4y + 3z = 42 (3)

We simplify and solve the equations and we get values,

x = 4
y = -7
z = 2

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2 years ago

Which of the following is the best term for the type of experiment described below?

Katen [24]

Double blind experiment

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2 years ago

Given: Rhombus ABCD. If mBAD is 64 degrees, then the mDCA is ___ degrees.

Marta_Voda [28]

Answer: 32 degrees

Step-by-step explanation: