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Naily [24]
3 years ago
9

Given the function below, find f(-5): f(x)= x^2 + 3x - 21​

Mathematics
2 answers:
erik [133]3 years ago
6 0

Answer:

Step-by-step explanation:

f(-5) = (-5)^2 + 3(-5) - 21

= 25 - 15 - 21

= -11

Irina18 [472]3 years ago
6 0

Answer:

11

Step-by-step explanation:

) f(x) = 3x2 + 5 and y = 3x2 + 5 ... You read this problem like this: “given f of x equals 4x plus one, find f of 2. ... Given f(x)= 3x – 4, f(5) = 11.

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How can you tell Is something is a unit rate
ArbitrLikvidat [17]

Unit rate is a ratio between two different units with a denominator of one. When we divide a fraction's numerator by its denominator, the result is a value in decimal form. For example: 8/4 = 2 and 3/6 = 0.5. When we write numbers in decimal form, we can write them as a ratio with one as the denominator.

For example, we can write 2 as 2/1, and 0.5 as 0.5/1. However, since that approach can be a little clumsy, we usually drop the one. That said, it's important to remember the one is there, especially when working with unit rates.

For instance, 8 miles/4 hours = 2 miles/hour. Notice again that, while we did not include the 1, we did include the unit 'hour' Miles per hour is a familiar expression, as are unit rates such as:

interest/amount invested

revolutions/minute

salary/year

Conversationally, the word ''per'' indicates we are using a unit rate.

4 0
4 years ago
7
Vinvika [58]

Answer:

126 square units

Step-by-step explanation:

Area of section 1 is 8 square units which is triangle and,

Area of triangle is =  \frac{1}{2}\times b\times h

b= 2 units and height =8 units

So,

Area of section 1  =  \frac{1}{2}\times 2\times 8=8 \quad\text{ square units}

Same Area is of section 2 which is also a triangle and has same base and height.

So,

Area of Section 2 = \frac{1}{2}\times 2\times 8=8 \quad\text{ square units}

Now the Area of section 3 which is square with side of 10 units

So,

Area of section 3 =  a^{2} =10\times10=100\quad \text{square units}

Total Area of Trapezoid = 8+8+100=126 \quad \text{square units}

5 0
2 years ago
The experimental probability and theoretical probability of an event are not
lubasha [3.4K]
B I’m just putting random letters because I have to add characters apparentlyndnnd
7 0
3 years ago
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<img src="https://tex.z-dn.net/?f=%5Csqrt%7B25%7D%20%2B%5Csqrt%7B9%7D%20%3D%20%3F" id="TexFormula1" title="\sqrt{25} +\sqrt{9} =
inn [45]

Answer:

\boxed{8}

Step-by-step explanation:

Simplify  \: the  \: following :  \\ =  >  \sqrt{25}  +  \sqrt{9}  \\  \\\sqrt{25}  =  \sqrt{ {5}^{2} }  = 5:  \\ =  > 5 +  \sqrt{9}  \\  \\ \sqrt{9}  = \sqrt{ {3}^{2} }   = 3:  \\ 5 + 3 \\  \\ 5+3=8:  \\ Answer:8

3 0
3 years ago
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There is a population of 139 bacteria in a colony. If the number of bacteria doubles every 189
Levart [38]

Answer:

556

Step-by-step explanation:

So, 378/189=2. So it will double two times. x2x2=x4. 139x4=556.

4 0
2 years ago
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