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Brilliant_brown [7]
2 years ago
7

PLZ HELP

Mathematics
1 answer:
Mekhanik [1.2K]2 years ago
4 0
Sounds like you’re dealing with absolute value.

1. Cookies
2. Bananas
3. Bananas and ice cream are the closest
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A 30-gram sample of bacteria has some unknown disease that is killing the bacteria. The amount of bacteria is measured each day
Firdavs [7]
For this case we have an equation of the form:
 y = A * (b) ^ t
 Where,
 A: initial amount
 b: decrease factor
 t: time
 Substituting values:
 y = 30 * (b) ^ t
 To calculate t we use a point in the table.
 We have:
 (t, y) = (1, 28.5)
 Substituting:
 28.5 = 30 * (b) ^ 1
 b = 28.5 / 30
 b = 0.95
 Answer:
 
a. Decay factor is 0.95
4 0
3 years ago
Select True or False for each statement.
mote1985 [20]
<h2>Answer:</h2>

For a real number a, a + 0 = a.  TRUE

For a real number a, a + (-a) = 1.  FALSE

For a real numbers a and b, | a - b | = | b - a |.  TRUE

For real numbers a, b, and c, a + (b ∙ c) = (a + b)(a + c).  FALSE

For rational numbers a and b when b ≠ 0, is always a rational number. TRUE

<h2>Explanation:</h2>

  • <u>For a real number a, a + 0 = a.  </u><u>TRUE</u>

This comes from the identity property for addition that tells us that<em> zero added to any number is the number itself. </em>So the number in this case is a, so it is true that:

a+0=a

  • For a real number a, a + (-a) = 1.  FALSE

This is false, because:

a+(-a)=a-a=0

For any number a there exists a number -a such that a+(-a)=0

  • For a real numbers a and b, | a - b | = | b - a |.  TRUE

This is a property of absolute value. The absolute value means remove the negative for the number, so it is true that:

\mid a-b \mid= \mid b-a \mid

  • For real numbers a, b, and c, a + (b ∙ c) = (a + b)(a + c).  FALSE

This is false. By using distributive property we get that:

(a + b)(a + c)=a^2+ac+ab+bc \\ \\ a^2+ab+ac+bc \neq a+(b.c)

  • For rational numbers a and b when b ≠ 0, is always a rational number. TRUE

A rational number is a number made by two integers and written in the form:

\frac{u}{v} \\ \\ v \neq 0

Given that a \ and \ b are rational, then the result of dividing them is also a rational number.

7 0
3 years ago
Read 2 more answers
Find an angle between 0° and 360° that is coterminal with 456°.
Ipatiy [6.2K]
Co-terminal angle = 456 - 360 = 96 degrees
4 0
3 years ago
Read 2 more answers
Which is the graph of f(x) = StartRoot x EndRoot?
arsen [322]

Answer:

B

Step-by-step explanation:

On a coordinate plane, an exponential function increases in

quadrant 3 into quadrant 4 and approaches y = 0. It goes through

(negative 1, negative 2) and crosses the y-axis at (0, negative 0.25) ⇒ last answer

HOPE IT HELPS ....

4 0
3 years ago
EDAL!!!!!!!!!!!! What is the missing justification in the proof of the Pythagorean identity below, sin^2(x)+cos^2(x)=1, using a
Novay_Z [31]
You have to jusitfy the step that leads from sin (x) = a/c and cos(x) = b/c to sin^2 (x) + cos^2(x) = [a^2 / c^2] + [b^2 / c^2].


As you can see go from the first statement to the second by substituting the value of sin(x) by a/x and the value of cos(x) by b/c.


Then, the answer is the option b. substitution property of equality.

 
3 0
3 years ago
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