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2 years ago

Does the graph represent a function? Yes or No

Mathematics

2 answers:

lisabon 2012 [21]2 years ago

8 0

Answer:

Yes, the graph is a function because the lines do not overlap one another (vertical line test)

- I hope this helps have a great night

Oxana [17]2 years ago

8 0

Yes but it’s undefined

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In order to take honors-level math, Lisa must have an average of 85 on her math tests. Her scores so far are 85, 70, and 98. Wha

Mila [183]

Answer:

d) 87

Step-by-step explanation:

to solve this lets set up the equation

$\frac{85+70+98+x}{4} =85\\\frac{253+x}{4} =85$

then we multiply 4 on both sides

253+x=340

and subtract 253 on both sides

x=87

to double check take the averages

(87+85+70+98)/4=85

5 0

2 years ago

Dinosaur fossils are often dated by using an element other than carbon, like potassium-40, that has a longer half life (in this

Firlakuza [10]

The amount of substance left of a radioactive element of half life, $t_{\frac{1}{2}}$ after a time, t, is given by:

$N(t)=N_0\left( \frac{1}{2} \right)^ \frac{t}{t_{ \frac{1}{2} }}$

Given that <span>potassium-40 has a half life of approximately 1.25 billion years.

The number of years it will take for 0.1% of potassium-40 to remain is obtained as follows:

$0.1=100\left( \frac{1}{2} \right)^ \frac{t}{1.25}} \\ \\ \Rightarrow\left( \frac{1}{2} \right)^ \frac{t}{1.25}}=0.001 \\ \\ \Rightarrow\frac{t}{1.25}\ln\left( \frac{1}{2} \right)=\ln(0.001) \\ \\ \Rightarrow \frac{t}{1.25}= \frac{\ln(0.001)}{\ln\left( \frac{1}{2} \right)} =9.966 \\ \\ t=9.966(1.25)=12.5$

Therefore, </span><span>the maximum age of a fossil that we could date using 40k is 12.5 billion years.</span>

3 0

2 years ago

Two factors have an estimated product of 10,000. One is a single digit. What two factors can they be. Explain your thinking

RideAnS [48]

It could be 5000 and 2, because 2 is a single digit and the product equals 10000.

5 0

2 years ago

help me please, this is due tomorrow ( The circumference of a circle is 53.38 centimeters. What is the area in square centimeter

g100num [7]

Step-by-step explanation:

C = 2πr = 53.38cm

r = C / 2π = 53.38cm / 2π = 53.38/ 6.283185307179586 = 8.4956cm

A = πr^2 = π × (8.4956cm^)2 = 226.4cm^2

7 0

1 year ago

X is = to 1/5 of the sum of 84.7,-27.8 and 82 what is the number

Masja [62]

Answer:

27.78

Step-by-step explanation:

x=(84.7+(-27.8)+82)÷5

x=138.9÷5

x=27.78

4 0

2 years ago