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horrorfan [7]
3 years ago
11

Please help me

Mathematics
2 answers:
elena55 [62]3 years ago
6 0

Answer:

a)

<u>The equation would be:</u>

  • 3x + 2 = 7*2

b)

Step 1. <u>Subtract 2 from both sides:</u>

  • 3x = 6*2

Step 2. <u>Divide both sides by 3:</u>

  • 3x/3 = 6*2/3
  • x = 2*2

c)

  • A single box weights x= 4 units.  
kap26 [50]3 years ago
4 0

<u>a) Solution:</u>

The equation that is represented by the diagram below will be,

→ 3x + 2 = 7 × 2

<u>b) Solution:</u>

The steps that can be taken are,

→ 3x + 2 = 7 × 2

→ 3x = 14 - 2

→ 3x = 12

→ x = 12/3

→ [x = 4]

<u>c) Solution:</u>

A single box weighs 4 units (kg), because the required value of x is 4.

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X^4-28x^2=0 solve algebraically
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x^4 - 28x^2  = 0

x^2(x^2 - 28) = 0

x^2 = 0 \ \ or \ \ (x^2 - 28) = 0

x = 0 \ \ or \ \ x^2 = 28

x = 0 \ \ or \ \ x = \pm \sqrt{28}

x = 0 \ \ or \ \ x = \pm2 \sqrt{7}

---------------------------------------------------
Answer : x = 0 or 2√7 or -2√7
---------------------------------------------------
8 0
3 years ago
Newton’s law of cooling states that the temperature of an object changes at a rate proportionalto the difference between the tem
Verizon [17]

Answer:

\frac{dT}{dt} = -0.05\;min^{-1}  (T-70\ºF)

Step-by-step explanation:

Hi!

Lets call:

T = temprature of the object

T₀ = temperature of surroundings

t = time

The rate of change of T is its derivative with respecto to time. If T > T₀, the object looses heat, so T decreases. Then, being k > 0:

\frac{dT}{dt} = -k(T-T_0) \\

In this case T₀ = 70ºF and k = 0.05/min. Then the differential equation is:

\frac{dT}{dt} = -0.05\;min^{-1}  (T-70\ºF)

3 0
3 years ago
Add 4x²y,-2xy²,-5xy²,3x²y plz explain​
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4x^2 - 2xy^2
5xy^2 +
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_____________
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This is so because 4+5+3 is 12, then using laws of indices to add your x and y you get x^5 and y^4

To simplify your answer to the lowest you have it in the form of
3x^2y^2(4x^2y - 2xy^2)

If you multiply this as well you get the same answer I got with the addition
3 0
3 years ago
Write the ratio two fifths<br> to 8 as a fraction in simplest form.<br><br> PLEASE HELP
charle [14.2K]

Answer:

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Step-by-step explanation:

7 0
3 years ago
15 1/4 - ? = 12 3/4 plsss help me
wariber [46]
1 and 1/2 is the right one
8 0
3 years ago
Read 2 more answers
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