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3 years ago

Explain your answer ! ( WILL GIVE BRAINLST)

Mathematics

1 answer:

Nonamiya [84]3 years ago

7 0

B because
Solve for the first variable in one of the equations, then substitute the result into the other equation.

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The sum of x and -15 is 23

mezya [45]

Answer: x=38

Step-by-step explanation:

x+(-15)=23

x-15=23

+15 +15

x=38

When there is a positive and negative sign the negative sign cancels the positive sign.

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3 years ago

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Solve the following quadratic equation:<br> (3x – 5)2 = 4

Katarina [22]

Answer:

Step-by-step explanation:

It is mandatory (required) to use " ^ " for exponentiation:

(3x – 5)^2 = 4

Taking the square root of both sides, we get

3x - 5 = ±2, or

3x = 5 ±2, or

(a) 3x = 7 => x = 7/3, and

(b) 3x = 3, or x = 1

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3 years ago

The Black Panther looks for Vibranium to put in his spear.He spends 3/5 of an hour searching.Over 4 days,about how many hours do

melisa1 [442]

Answer:

RIP chadwick

Step-by-step explanation:

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3 years ago

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a spinner has 6 equal-sized sections numbered 1,1,2,2,3and 4. what is the sample space for the spinner, and what is the probabil

Nezavi [6.7K]

Answer:

S={1, 1, 2, 2, 3, 4}

Probability of spinning a 1 = 1 in 3 or 33%

Step-by-step explanation:

The sample space is the set of all possible outcomes in an experiment. The outcomes here are the numbers in each section of the spinner: 1, 1, 2, 2, 3, 4. The sample space is:

S={1, 1, 2, 2, 3, 4}

Two out of six possible outcomes are "1s", therefore the probability of spinnin a 1 is:

$P(1)=\frac{2}{6}=\frac{1}{3}=33.33\%$

The probability of spinning a 1 is 1 in 3 or 33%.

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3 years ago

A yeast culture weighing 2 grams is removed from a refrigerator unit and is expected to grow at the rate of Upper W prime (t )eq

Naily [24]

Answer:

a) during the first 10 hours of growth the weight will increase 271.8% relative to the initial state ( or 2.718 g)

b) during the first 20 hours of growth the weight will increase 467.1 % relative to the initial state ( or 4.671 g)

Step-by-step explanation:

since the growing rate law is

W'(t) = 0.1 gr/hour * e^(0.1gr/hour* t) , W'(t) [gr/hour]

and following mathematical conventions: W'(t)= dW/dt

then

dW/dt=0.1 e^(0.1t)

∫dW =∫0.1 e^(0.1t) dt

W = e^(0.1t) + C

at the beginning, (time t=0) the weight is W=2 grams .Therefore

2 g = e^(0.1 g/h*0) + C → 2 g = 1 g + C → C = 1 g

then

W = e^(0.1t) + 1 g

at t= 10 hours

W = e^(0.1 g/h*10h) + 1 g = 3.718 g/h

therefore the weight will increase

ΔW = 3.718 g - 1 g = 2.718 g or 271.8% relative to the initial state

for t=20 hours

W = e^(0.1 g/h*20h) + 1 g = 8.389 g/h

thus, the from t= 10 hours to t= 20 hours the weight will increase

ΔW = 8.389 g/h - 3.718 g = 4.671 g or 467.1 %relative to the initial state

5 0

3 years ago