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2 years ago

How do o solve this equation? 4(3x - 10) + 7 = 15

Mathematics

2 answers:

Rama09 [41]2 years ago

5 0

X=4 because first u distruste and add the numbers then add 33 to both side

Aleksandr-060686 [28]2 years ago

4 0

Answer:

x = 4

Step-by-step explanation:

4(3x - 10) + 7 = 15

multiply 3x and 10 by 4

12x - 40 + 7 = 15

add 40 both sides

12x + 7 = 55

subtract 7 from both sides

12x = 48

divide

x = 4

hope this helps :)

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Question 3 (1 point) Co-60 has a half life of 5.3 years. If a pellet that has been in storage for 26.5 years contains 14.5g of C

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Answer:

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Step-by-step explanation:

Amount of substance:

The amount of substance after t years is given by an equation in the following format:

$A(t) = A(0)(1-r)^t$

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This means that:

$A(5.3) = 0.5A(0)$

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$\sqrt[5.3]{(1-r)^{5.3}} = \sqrt[5.3]{0.5}$

$1 - r = 0.5^{\frac{1}{5.3}}$

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3 years ago

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I hope this helps.

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