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3 years ago

Help me solve this equation please. y/9 + 5 = 0

Mathematics

2 answers:

Tresset [83]3 years ago

8 0

y/9 +5 =0

subtract 5 from each side

y/9 = -5

multiply both sides by 9

y = -5 * 9

y = -45

ira [324]3 years ago

7 0

Multiply all 3 terms by 9 to remove the fraction 1/9:

y + 45 = 0. Then y = -45.

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Use the parabola tool to graph the quadratic function f(x)=−5x2−2.

alexira [117]

$\text{Consider the quadratic function}\\
\\
f(x)=-5x^2-2\\
\\
\text{For a quadratic equation, }f(x)=ax^2+bx+c, \text{ we know that the x-coordinate}\\
\text{of the vertex (h,k) is given by}\\
\\
h=\frac{-b}{2a}\\
\\
\text{on comparing the given equation with standard equation, we have}$

$a=-5, b=0, c=-2\\
\\
\text{so the x-coordinate of the vertex is }\\
\\
h=-\frac{b}{2a}=-\frac{0}{2(-5)}=0\\
\\
\text{so plug this vlaue of the h in the given function to get the y-coordinate}\\
\text{of the vertex. so}\\
\\
f(x)=-5(0)^2-2=0-2=-2\\
\\
\text{hence the vertex of the parabola is: }(h,k)=(0,\ -2)\\
\\
\text{A second point on the graph can be found by putting x=1, so }\\
\\
f(1)=-5(1)^2-2=-5-2=-7\\
\\
\text{so one other point on the parabola is }(1,-7)$

The grpah of the quadratic function is shown below:

5 0

4 years ago

A scuba diver starts at 85 3/4 meters below the surface of the water and descends until he reaches 103 1/5

RSB [31]

Answer:

From his starting point of 85 3/4, he descended 17 9/20 meters

Step-by-step explanation:

We want to know how much farther he went down from his starting point.

103 1/5 - 85 3/4

tart off by making the denominators of both the numbers the same.

103 1/5 - 85 3/4

103 4/20 - 85 15/20

Make them into improper fractions

2064/20 - 1715/20 = 349/20

Make 349/20 into a mixed fraction

17 9/20

5 0

3 years ago

I need help please

saul85 [17]

Answer-44

You can turn both of the denominators ( bottom numbers on the fractions ) into 120 ( the whole number ) and the top numbers can be multiplied by how many times the denominators went into 120. Then add the top numbers which equals 76 and then 120-76=44. Hope that kinda helps !!

7 0

3 years ago

What is the results of 4/5 × 2/3 ?

Alinara [238K]

Answer:

8/15 or 0.53333...

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Find the volume of the solid figure. <br> A. 96 pi cu in <br> B. 120 pi cu in <br> C.192 pi cu in

sineoko [7]

Answer:

A. 96π in³

Step-by-step explanation:

The formula you can use to find the volume of a cone is ...

V = (π/3)r²·h . . . . where r is the radius and h is the height

Put the given numbers into the formula and do the arithmetic.

V = (π/3)(6 in)²(8 in) = 96π in³

8 0

3 years ago