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ella [17]
4 years ago
7

What is 3x-5y=12 with a substitution of X=3y

Mathematics
1 answer:
Step2247 [10]4 years ago
8 0
3x-5y=12
X=3y

3(3y)-5y=12
9y-5y=12
4y=12
y=3

X=3y
X=3(3)
X=9
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Dos numeros naturales se diferencian en 7 unidades y la suma de sus cuadrados es 289
NeTakaya

Answer:

15 y 8

Step-by-step explanation:

y = x - 7

x² + y² = 289

sustituir: x² + (x - 7)² = 289

distribuir: x² + x² - 14x + 49 = 289

sustraer + simplificar: 2x² - 14x - 240 = 0

dividir: x² - 7x - 120 = 0

x² - 15x + 8x - 120 = 0

(x - 15)(x + 8) = 0

x = 15, x = -8 --> x ≠ -8 porque -8 no es naturales

sustituir: y = 15 - 7

simplificar: y = 8

6 0
3 years ago
If nx10^p is a positive number written in scientific notation which statements must be true? Select all that apply
liq [111]

For this case we have the following number written in scientific notation:


n * 10 ^ p

We know that this number is greater than zero because it is a positive number.

Therefore, the following statements are true:

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Answer:

The following statements are correct about the number written in scientific notation:

p ∈ (-∞, ∞)

n ∈ [1, 10]

3 0
3 years ago
Help please it for a really important test
Arada [10]

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Step-by-step explanation:

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kow [346]

Step-by-step explanation:

in my opinion

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