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Sauron [17]
3 years ago
7

Which polynomial is a perfect square trinomial? (1 point) 49x2 − 28x + 16 4a2 − 20a + 25 25b2 − 20b − 16 16x2 − 24x − 9?

Mathematics
1 answer:
aliina [53]3 years ago
3 0
4a² − 20a + 25 <span>is a perfect square trinomial

</span>4a² − 20a + 25 = 
<span>(2a)</span>² - 2*2a*5 + 5² = 
<span>(2a - 5)</span>²<span>

</span>
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galben [10]
What two cars, I don’t see anything
6 0
3 years ago
Please help and explain with these 2 math questions!!!!!!
Volgvan

1)  -10x+y=4

Now, you should substitute x in every situation.

* x=-2 <em>=> -10*(-2)+y=4... 20+y=4... <u>y=-16</u></em>

<em />* x=-1 =>-10*(-1)+y=4... 10+y=4... <u>y=-6</u>

<u />*x=0 => -10*0+y=4... <u>y=4</u>

<u />* x=1 =>  -10*1+y=4... -10+y=4... <u>y=14</u>

<u />* x=2 => -10*2+y=4... -20+y=4... <u>y=24</u>

<u>2)</u> -5x-1=y

For example: x=0

-5*0-1=-1

<u>
</u>



6 0
3 years ago
HELPP!!!! 100 points. Which expression is equivalent
devlian [24]

Answer:

\Large \boxed{\sf A}

Step-by-step explanation:

\displaystyle 2x\sqrt{44x}-2\sqrt{11x^3}

Let<em> x</em>  = 2 because x > 0

\displaystyle 2(2)\sqrt{44(2)}-2\sqrt{11(2)^3}=4\sqrt{22}

See which expression is equal to 4√22 when <em>x</em> = 2

2(2)\sqrt{11(2)}=4\sqrt{22}

The expression is option A

8 0
3 years ago
Read 2 more answers
Simple interest I in dollars is calculated using the formula I=​prt, where p represents the​ principal, or amount in dollars tha
Sergeeva-Olga [200]

and we do this one the same way as the other.


\bf ~~~~~~ \textit{Simple Interest Earned} \\\\ I = Prt\qquad  \begin{cases} I=\textit{interest earned}\dotfill&\$540\\ P=\textit{original amount deposited}\dotfill & \$4800\\ r=rate\to 4.5\%\to \frac{4.5}{100}\dotfill &0.045\\ t=years \end{cases} \\\\\\ 540=(4800)(0.045)t\implies \cfrac{540}{(4800)(0.045)}=t\implies 2.5=t

8 0
3 years ago
Read 2 more answers
Heeeeeelp! I’m literally so behind
olchik [2.2K]

Answer:

That would be 9 my good sir ( or ma'am )

Step-by-step explanation:

basicly round the 61 so that there would not be a remainder and divide 54 by 6 you will get 9, so therefore the same case is for 540 by 60.

Have a nice day

7 0
3 years ago
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