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Nadusha1986 [10]
3 years ago
13

I need help PLZZZ!!!!

Mathematics
2 answers:
Sergeeva-Olga [200]3 years ago
6 0

Answer:

D.

Step-by-step explanation:

Anarel [89]3 years ago
5 0
Step by step! Explanation!
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Here this is the new one.
Helga [31]

Formula #1: 0.15x + 22

Formula #2: 0.19x

0.15x + 22 = 0.19x

15x+2200=19x\\15x=19x-2200\\-4x=-2200\\\frac{-4x}{-4}=\frac{-2200}{-4}\\X = 550

So x = 550.

I hope this helps! :)

5 0
3 years ago
What would be the maximum value for f(x) = −5x2 + 9
Maru [420]
Well, looking at the expression, it has a -5 on the leading term, that means is not just a quadratic, but is a parabolic graph and because the coefficient of the leading term is negative, is upside-down, or opening downwards.

because it opens downwards, it looks like an arc, comes from the bottom up up up gets to a "maximum" or U-turn (vertex), then goes back down down down.  So, where's the vertex anyway?

\bf \textit{ vertex of a vertical parabola, using coefficients}\\\\
\begin{array}{lccclll}
f(x) = &{{ -5}}x^2&{{ +0}}x&{{ +9}}\\
&\uparrow &\uparrow &\uparrow \\
&a&b&c
\end{array}\qquad 
\left(-\cfrac{{{ b}}}{2{{ a}}}\quad ,\quad  {{ c}}-\cfrac{{{ b}}^2}{4{{ a}}}\right)
\\\\\\
\left( -\cfrac{0}{2(-5)}~~,~~9-\cfrac{0}{4(-5)} \right)\implies (0~~,~~9)

so, that's where the vertex is, and the maximum value for f(x), is the y-coordinate of course, or 9.
3 0
3 years ago
Find the balance in an account with $4,250 principal earning 3% interest compounded quarterly after 12 years. Round your answer
Marat540 [252]
X = principle ( 1 + rate/compound rate) ^ years

x = 4250[1+(0.3/4)]^12
x = 4250(1+0.075)^12
x = 4250(1.075)^12
x = 4250(2.38178)
x = $10,122.23
3 0
4 years ago
Is 3 1/2 cups more or less than 1 liter? Explain or show your reasoning
IceJOKER [234]
3 1/2 is less because 1 liter in cups is 4.227
7 0
3 years ago
David equally shares 8 bales of hay among 15 cows.<br> What fraction of a bale will each cow get?
Nezavi [6.7K]

Answer:

8/15

Step-by-step explanation:

you divide 8 by 15 to get the fraction

6 0
3 years ago
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