3 years ago

PLS HELP ASAP THANKS ILL GIVE BRAINLKEST PLS THANKS

Mathematics

2 answers:

vekshin13 years ago

8 0

Answer:

y= x+75

Step-by-step explanation:

We already have 75 and add x money

Jlenok [28]3 years ago

6 0

Answer:

its B

Step-by-step explanation:

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The length of an equilateral triangle is increased by 5 cm. The perimeter of the new triangle is 72 cm. What is the side length

Igoryamba

Answer:

19cm

Step-by-step explanation:

An equilateral triangle is a triangle where the length of the 3 sides are the same.

the perimeter is the sum of the 3 sides

for example, if the length of the side of the an equilateral triangle is 5, the perimeter is 5 x 3 = 15

let x = unknown length of side

length after increase = x + 5

(x + 5) x 3 = 72

divide both sides of the equation by 3

x + 5 = 24

subtract 5 from both sides of the equation

x = 24 - 5 = 19cm

6 0

3 years ago

The half-life of cesium-137 is 30 years. Suppose we have a

VMariaS [17]

(a) If $y(t)$ is the mass (in mg) remaining after $t$ years, then $y(t) = y(0) e^{kt}=100e^{kt}.$

$y(30) = 100 e^{30k} = \frac{1}{2}(100) \implies e^{30k} = \frac{1}{2} \implies k = -(\ln 2) /30 \implies \\ \\
y(t) = 100e^{-(\ln 2)t/30} = 100 \cdot 2^{-t/30}$

(b) $y(100) = 100 \cdot 2^{-100/30} \approx \text{9.92 mg}$

(c)
$100 e^{- (\ln 2)t/30} = 1\ \implies\ -(\ln 2) t / 30 = \ln \frac{1}{100}\ \implies\ \\ \\
t = -30 \frac{\ln 0.01}{\ln 2} \approx \text{199.3 years}$

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3 years ago

Brianna is 2 years less than 4 times the age of Zack. If Zack's age in years is y, which expression represents Brianna's age?

alukav5142 [94]

The answer is C. 4y —2

8 0

3 years ago

Read 2 more answers

I will give brainly to the person who answers first <br> what is 1/2 divided by 6

ivolga24 [154]

The answer is 0.08333333333

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