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3 years ago

Which expression is exactly equivalent to 5a + 3b + 4 + 7a + 9 ?

Mathematics

2 answers:

Cloud [144]3 years ago

7 0

Answer:

Step-by-step explanation:

5a+3b+4+7a+9=

=12a+3b+13

allsm [11]3 years ago

6 0

Expression 2
12a+3b+13

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THIS IS URGENT I NEED HELP ASAP.(9x 10^-3)^2

joja [24]

(9x 10^-3)^2= $\frac{81x^{2}}{1000000}$ , so d 8.1x10^-6

Evaluate 1/2a^-4b^2 for a =-2 and b=4

$\frac{1}{2} (-2)^{-4} *4^{2}\\\\\frac{1}{2} *\frac{1}{(-2)^{4}} *4^{2}\\\\\frac{1}{2} *\frac{1}{2^{4}}*4^{2}\\\\\frac{1}{2} *\frac{1}{16}*4^{2}\\\\\frac{1}{2} *\frac{1}{16}*16=\frac{1}{2}$

A number raised to a negative exponent is sometimes negative.

Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! As well as a great Valentines Day! :-)

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3 years ago

85% of £30

sergij07 [2.7K]

Re read the question again just in case, try and put £25.50
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3 years ago

The Cooper family decided to hike to Hillside Lake, Approximately 8 5/8 miles away. After an hour the lake was still 5 1/3 away.

statuscvo [17]

3 7/24 is the answer for your question

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3 years ago

Read 2 more answers

What is <br><img src="https://tex.z-dn.net/?f=12%20%7B%3F%7D%5E%7B2%7D%20%20%5C%5C%20" id="TexFormula1" title="12 {?}^{2} \\ "

marin [14]

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4 years ago

A baseball is hit into the air, and its height h in feet after t seconds is given by h(t)= -16t^2+128t+2. The height of the bas

tankabanditka [31]

Answer:

$\large \boxed{\sf \ \text{2 feet, 4 seconds, 258 feet } \ }$

Step-by-step explanation:

Hello,

To know the height of the baseball when it is hit we have to compute h(0), as t = 0 is when the baseball is hit into the air.

$h(0)=-16\cdot 0^2+128 \cdot 0+2=2$

So, the answer is <u>2 feet.</u>

<u />

h(x) is a parabola which can be written as $ax^2+bx+c$ , it means that the vertex is the point (-b/2a,h(-b/2a)).

The baseball reached its maximum height after

$\dfrac{-b}{2a}=\dfrac{-128}{-2*16}=\boxed{4 \text{ seconds}}$

And the maximum height of the baseball is h(4).

$h(0)=-16\cdot 4^2+128 \cdot 4+2=-256+512+2=\boxed{258 \ \text{feet}}$

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

8 0

4 years ago