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erastova [34]
3 years ago
5

3x-y=-55x+7y=29Solve this for me using substitution pls

Mathematics
1 answer:
pentagon [3]3 years ago
3 0

Answer:

(- 3/13, 56/13)

Step-by-step explanation:

See steps below:)

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5. If the tree's circumference is 141.3ft, what is its diameter?
BigorU [14]

Answer:

d ≈ 45 ft

General Formulas and Concepts:

<u>Symbols</u>

  • π (pi) ≈ 3.14

<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  

Equality Properties

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

<u>Geometry</u>

  • Circumference of a Circle Formula: C = πd

Step-by-step explanation:

<u>Step 1: Define</u>

Circumference <em>C </em>= 141.3 ft

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

  1. Substitute in <em>C</em> [Circumference Formula]:                                                       141.3 ft = πd
  2. Substitute in π (approximation):                                                                      141.3 ft ≈ 3.14d
  3. [Division Property of Equality] Divide both sides by 3.14:                              45 ft ≈ d
  4. Rewrite:                                                                                                             d ≈ 45 ft
7 0
3 years ago
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Lucy has a monthly health insurance premium of $230. Her employer pays 35% of her premium.
choli [55]
45% bsbsbsbshdjudhdhdjdjxjxhdbdb
8 0
4 years ago
Identify the area of the trapezoid.
mina [271]

Answer:I'm not sure but I can either divide or multiple

Step-by-step explanation:

4 0
3 years ago
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I need help someone please help it would mean a lot
Anna71 [15]

Step-by-step explanation:

the answer is 9................

8 0
3 years ago
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Please click the picture and help me :D
harkovskaia [24]
Well first of all, let's define what an integer is...

Integers are numbers such as -2, -1, 0, 1, 2 etc etc.

------

If f(5)=12,

f(6)=0.3*f(6-1)

= 0.3*f(5)

= 0.3*12

= 3/10 * 12

= 36/10

= 3.6

We now know that f(6)=3.6

Now:

f(7)=0.3*f(7-1)

= 0.3*f(6)

= 0.3*3.6

= (3/10) * (36/10)

= 108/100

= 1.08

Answer:

f(7)=1.08
4 0
4 years ago
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