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Marina CMI [18]

3 years ago

13

Find

\to \ 0}" align="absmiddle" class="latex-formula"> $\frac{f(x+h)-f(x)}{h}$ if f(x)= 2x^2 - 5x

2 answers:

konstantin123 [22]3 years ago

4 0

Answer:

4x-5

Step-by-step explanation:

kvv77 [185]3 years ago

3 0

Answer:

Step-by-step explanation:

hello : here is an solution

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A northbound train and a southbound train meet each other on parallel tracks heading in opposite directions. The northbound trai

Ksju [112]

Recall your d = rt, distance = rate * time.

if, the southbound train is going at a speed of say " r " mph, since we know that the northbound one is going faster by 4 miles, than is really going at " r + 4 " mph then.

now, we know in 2.5 hours, they're 330 miles from each other, thus the southbound train has been rolling for 2.5 hours, and the northbound train has also been rolling for 2.5 hours.

if the northbound train has covered on those 2.5 hours say " d " miles, then the southbound train has covered the slack, or " 330 - d ".

$\bf \begin{array}{lccclll}
&\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{t}\\
&------&------&------\\
Northbound&d&r+4&2.5\\
Southbound&330-d&r&2.5
\end{array}
\\\\\\
\begin{cases}
\boxed{d}=2.5(r+4)\\
330-d=2.5r\\
----------\\
330-\boxed{2.5(r+4)}=2.5r
\end{cases}
\\\\\\
330-2.5r-10=2.5r\implies 320=5r\implies \cfrac{320}{5}=r\implies 64=r$

how fast is the northbound going? well, r + 4.

7 0

3 years ago

What is the monomial if a square of a monomial is: 0.0001*a^8*x^4

Georgia [21]

Answer:

Monomial $0.0001\cdot a^8\cdot x^4$ is a square of monomial $0.01\cdot a^4\cdot x^2$

Step-by-step explanation:

Given monomial $0.0001\cdot a^8\cdot x^4$

Using property $(a^m)^n=a^{m\cdot n},$ note that

$0.0001=(0.01)^2\\ \\a^8=(a^4)^2\\ \\x^4=(x^2)^2$

So,

$0.0001\cdot a^8\cdot x^4=(0.01)^2\cdot (a^4)^2\cdot (x^2)^2.$

Now use property $(a\cdot b)^n=a^n\cdot b^n$ to rewrite the previous expression:

$(0.01)^2\cdot (a^4)^2\cdot (x^2)^2=(0.01\cdot a^4\cdot x^2)^2$

Hence, monomial $0.0001\cdot a^8\cdot x^4$ is a square of monomial $0.01\cdot a^4\cdot x^2$

7 0

2 years ago

Find (g o f)(-1). *

klio [65]

Answer:

D -9

Step-by-step explanation:

(g o f)(-1) = g(f(-1))

f(-1) = $f(-1) = (-1)^{2} + 2(-1) - 3\\= 1 - 2 - 3\\= -4$

g(-4) = -4 - 5 = -9

So, (g o f)(-1) = -9

6 0

2 years ago

Everett made 3/5 of the basket he shot suppose he shot 60basket how many did he make

mote1985 [20]

60×3/5=36

that is the answer

8 0

3 years ago

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The distance traveled by a car at a constant rate is proportional to the time spent driving. In the equation d = 45t, d represen

OverLord2011 [107]

The constant of proportionality should be 45 miles per hour, and the car should travel 135 miles in three hours.

8 0

2 years ago