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r-ruslan [8.4K]
3 years ago
6

I need some help please help meeee!

Mathematics
2 answers:
Reil [10]3 years ago
7 0

Answer:

1. A

2. C

3. B

4. B

Step-by-step explanation:

1. Subtract 4.2 on both sides of the equation so you're left with y = -0.8

2. Add 1.9 on both sides of the equation so you are left with m = 4.

3. Distribute 1/5 into (3+2z) to get 3/5 + 2/5z - 4z = -3. Combine like terms so you have 3/5 - 3 3/5z = -3. Subtract 3/5 on both sides to get -3 3/5z = -3 3/5. Divide by -3 3/5 on both sides to get z = -1.

4. Distribute 4 into (2+ t) to get 1/2t -8 -4t = 20. Combine like terms to get -3 1/2t - 8 = 20. Add 8 on both sides to get -3 1/2t = 28. Divide -3 1/2 on both sides to get t = -8.

nevsk [136]3 years ago
4 0

Answer:

1=a

2=c

3=b

4=a

Step-by-step explanation:

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Answer:

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General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

Equality Properties

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  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Trigonometry</u>

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<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Substitute in variables [Cosine]:                                                                    \displaystyle cosx^\circ = \frac{5.8}{7.3}
  2. [Fraction] Divide:                                                                                             \displaystyle cosx^\circ = 0.794521
  3. [Equality Property] Trig inverse:                                                                    \displaystyle x^\circ = cos^{-1}(0.794521)
  4. Evaluate trig inverse:                                                                                      \displaystyle x = 37.39^\circ
  5. Round:                                                                                                             \displaystyle x \approx 37.4^\circ
8 0
3 years ago
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