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Nezavi [6.7K]
3 years ago
6

-3x +2y= 4 4x-13y=5 solve by elimination

Mathematics
1 answer:
Svet_ta [14]3 years ago
4 0
I am better at substitution, but you want to get the equations as similar as possible, but are the opposite, so you can cancel it out.

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Gabe and Caden mow lawns
7nadin3 [17]

Answer:

what is the question?

Step-by-step explanation:

7 0
2 years ago
What is the net decimal equivalent of the series 30/25/15. round to the nearest thousandths?
Brut [27]
<span>We can determine, a 30/25/15 series trade discount would be calculated as follows:

let X = retail price.

X - 0.30 </span>× X = Y    ⇒ first discounted price.
<span>
Y - 0.25 </span>× Y = Z    ⇒ second discounted price.
<span>
Z - 0.15*Z = T        </span>⇒ total discounted price.
<span>
X - 0.30 </span>× X = (1 - 0.30) × X = 0.70 × X = Y
<span>
Y - 0.25 </span>× Y = (1 - 0.25) × Y = 0.75 × Y = Z
<span>
Z - 0.15 </span>× Z  = (1 - 0.15) × Z  = 0.85 × Z = T
<span>
since Z = 0.85 </span>× Y, then 0.85 × Z = 0.85 × 0.75 × Y
<span>
since Y = 0.70 </span>× X, then 0.85 × Z = 0.85 × 0.75 × 0.70 × X
<span>
based on the above, then T = total discount


                                               = 0.85 </span>× 0.75 × 0.70 × X


                                               = 0.44625X<span>

30/25/15 series discount is equivalent to a total discount of 44.625%
</span>
7 0
3 years ago
Average serving size is 500mls which is 1050kj.
astra-53 [7]

Answer:

  2625 kJ

Step-by-step explanation:

We assume the energy is proportional to the volume:

  energy/volume = 1050 kJ/(500 mL) = E/(1250 mL)

Multiply by 1250 mL:

  E = (1250/500)(1050 kJ) = 2625 kJ

The number of kJ in 1.25 L of Lemon Squash is 2625 kJ.

5 0
3 years ago
Which equation when graphed is not a straight line (is nonlinear)
kompoz [17]

Answer  for this question you have to graph  it

Step-by-step explanation:

5 0
2 years ago
find the simplified form of the expression give your answer in scientific notation (4 ×10^10)(9×10^-5)​
xz_007 [3.2K]

Answer:

3.6 x 10^6

Step-by-step explanation:

(4 ×10^10)(9×10^-5)​

= (4 x 9) x 10^(10 - 5)

= 36 x 10^5

= 3.6 x 10^6   <-------in scientific notation

3 0
3 years ago
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