3 years ago

Evaluate the expression if y=4.4 and z= 12 z2+ 8y

Mathematics

1 answer:

Evgen [1.6K]3 years ago

5 0

Answer: 59.2

Step-by-step explanation:

Take your equation

z2+8y

Now plug in the values given

(12)2+8(4.4)

24+35.2

59.2

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Answer:

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Step-by-step explanation:

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let x =5

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Answer:

Step-by-step explanation:

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$2^{x^{2} +2x}=2^{-1}$

Comparing exponents on both the sides.

x² + 2x = -1

x² + 2x + 1 = 0

(x + 1)² = 0

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2). $2^{x-3}=8^{x+1}$

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By comparing exponents,

x - 3 = 3(x + 1)

x - 3 = 3x + 3

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3). $\sqrt{a^{5-k}}=a^{3-k}$

$a^{\frac{5-k}{2}}=a^{3-k}$

By comparing exponents,

$\frac{5-k}{2}=3-k$

5 - k = 2(3 - k)

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2k - k = 6 - 5

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$3^{x+3}=(3^3)^{2x+6}$

$3^{x+3}=(3)^{3(2x+6)}$

By comparing exponents,

x + 3 = 3(2x + 6)

x + 3 = 6x + 18

6x - x = 3 - 18

5x = - 15

x = -3

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$5^{(x-2)}=5^{0}$

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3 years ago

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