3 years ago

Evaluate the expression for x=10

Mathematics

1 answer:

Elina [12.6K]3 years ago

5 0

Answer:

what is the function? please provide a function.

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What are the zeroes of the polynomial equation?<br><br> f(x) = x^2+9x+20

vredina [299]

Zeroes are when f(x)=0
0=x^2+9x+20
factor
0=(x+4)(x+5)
set each to zero
x+4=0
x=-4
x+5=0
x=-5

zeroes are f(-5) and f(-4)

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3 years ago

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Tom knows that in his school 15 out of every 85 students are left handed. There are 153 students in Tom's school. How many stude

telo118 [61]

Answer:

27 students are left handed

Step-by-step explanation:

153/85 = 1.8 or 1 8/10. Now multiply your quotient by 15 and your answer will be 27

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3 years ago

A sample of 400 grams of radioactive substance decays according to the function A(t) = 400e^-.046t, where t is the time in years

algol13

Answer: There will be 0.04 grams will be left in the sample after 20 years.

Step-by-step explanation:

Since we have given that

$A(t)=400e^{-0.46t}$

Here, Initial amount of radioactive substance = 400 grams

We need to find the amount of substance that will be left in the sample after 20 years.

So, t = 20 years

So, it becomes,

$A(t)=400e^{-0.46\times 20}\\\\A(t)=400e^{-9.2}\\\\A(t)=0.04\ grams$

Hence, there will be 0.04 grams will be left in the sample after 20 years.

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4 years ago

What are the answers for cake? i need this quickly

lesya692 [45]

Answer:

1st blank column:11

2nd blank column:11/14

THESE ARE THE ANSWERS AS PER MY CALCULATION

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3 years ago

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What is y after the following statement is executed? x = 0; y = (x > 0) ? 10 : -10;?

Novosadov [1.4K]

Ahh, i can see youre doing some programming. In C++ this output is -10
So -10

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4 years ago