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3 years ago

Solve 2^x^2+5x=1/16 without using logarithms. quick plz 15 points

Mathematics

1 answer:

Marianna [84]3 years ago

6 0

Answer:

x=-4, x=-1

Step-by-step explanation:

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System of equation by elimination 4x-6y=10 and 3x+6y=4

Whitepunk [10]

Solving:

$\left \{ {{4x-6y=10\:(I)} \atop {3x+6y=4\:(II)}} \right.$

$\left \{ {{4x-\diagup\!\!\!\!\!6y=10} \atop {3x+\diagup\!\!\!\!\!6y=4}} \right.$

$\left \{ {{4x=10} \atop {3x=4}} \right.$
----------------------
$7x = 14$
$x = \frac{14}{7}$
$\boxed{\boxed{x = 2}}\end{array}}\qquad\quad\checkmark$

<span>Now replace the found value of "x" in equation (II) to find the value of "y"

</span> $3x+6y=4\:(II)$
$3*(2) + 6y = 4$
$6 + 6y = 4$
$6y = 4 - 6$
$6y = - 2$
$y = \frac{-2}{6} \frac{\div2}{\div2} \to \boxed{\boxed{y = \frac{-1}{3}}} \end{array}}\qquad\quad\checkmark$

Answer:
x = 2
y = - 1/3
<span>
</span>

6 0

3 years ago

Milan tutors history. For each hour that he tutors, he earns 50 dollars. His earnings, (in dollars), after tutoring for hours is

Nady [450]

Total pay = (50dollars/hour) * (h hours)

Hope that helps!

8 0

2 years ago

Which equation represents the average of the x-intercepts for 4x^2-24x+20

vazorg [7]

Number of x intercepts in this equation is 2 because max power in the function is 2. number of x intercepts is determined by "highest power".

let x1 represent first x intercept and
let x2 represent second x intercept

Formula for finding average of x intercepts is logicaly:
Avg = (x1 + x2)/2

we want to find x1 and x2
4x^2 - 24x + 20 = 0
x^2 - 6x + 5 = 0

x1 = 5
x2 = 1

Avg = 3

6 0

3 years ago

A grocery store charges $1.49 per pound of bananas. Use a unit rate to find the price of 3 pounds of bananas.

Anna007 [38]

Answer:

$4.47

Step-by-step explanation:

Price if 1 pound of bananas=$1.49

Price if 3 pounds of bananas=3x$1.49

=$4.47

7 0

3 years ago

PLEASE HELP ASAPPPP!!!!

Ludmilka [50]

Idk, pick one of them, thats ur best bet

6 0

2 years ago