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murzikaleks [220]
3 years ago
14

I need help solving this

Mathematics
1 answer:
klasskru [66]3 years ago
5 0

Answer:

a- 30

Step-by-step explanation:

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3x + 5 = 5x - 11. What is the value of x in this equation.
svlad2 [7]
Make sure that when you bring a number to the other side of the equal sign, you need to change from + to - or from - to +

5 0
3 years ago
Read 2 more answers
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
Emma bought 7 notebooks for $8.75. How much would 2 notebooks cost?
goldenfox [79]

Answer:

$2.50

Step-by-step explanation:

8.75 / 7= 1.25

1.25 * 2 =2.50

4 0
3 years ago
Please please please help me
yawa3891 [41]
I’ll help!
Give me a moment I will message you the answers
8 0
3 years ago
A/50 = 3/5 Solve for “a” by cross multiplying then divide.
garik1379 [7]

Answer:

a = 30

Step-by-step explanation:

a/ 50 = 3/5

Using cross products

a*5 = 50 *3

5a = 150

Divide each side by 5

5a/5 = 150/5

a = 30

7 0
3 years ago
Read 2 more answers
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