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3 years ago

Help me with IXL Math... I'll MARKO you as Brainliest.

Mathematics

2 answers:

Leviafan [203]3 years ago

4 0

Answer:

x = -5/2

Step-by-step explanation:

Line of symmetry of a quadratic is:

x = h

Where h is the x-coordinate of the vertex.

For any quadratic,

y = ax² + bx + c

h = -b/2a

For the given quadratic,

y = x² + 5x

h = -5/(2×1) = -5/2

Equation of the line of symmetry therefore is

x = -5/2

stepan [7]3 years ago

4 0

Answer:

x = -5/2

Step-by-step explanation:

Hope I helped ya.

I know I'm late.

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Please tell me in order which one is greatest and which one is the least I need it at least the greatest please hurry up

Margarita [4]

Answer:

1 1/2= 0.50

2 square root of 2= 1.41

3 3/2 1.5

4 square root of 9= 3

5 square root of 12= 3.464

6 3.56

7 4.03

8 square root of 17= 4.123

9 4.2

10 12

if I get any wrong I'm sorry have a nice day!!

Step-by-step explanation:

6 0

3 years ago

The area of a rectangular

tankabanditka [31]

Answer:

2x+5

Step-by-step explanation:

Okay so lets first factor 2x^2+15x+25

2*25=50

10+5=15

10*5=15

(x+10/2)(x+5/2)

=(x+5)(2x+5)

we know that the width is x+5 so that means the length has to be 2x+5

3 0

3 years ago

A rectangular box with a square base is to be constructed from material that costs $9 per ft2 for the bottom, $5 per ft2 for the

kramer

Answer:

$18.73ft^3$

Step-by-step explanation:

Let

Side of square base=x

Height of rectangular box=y

Area of square base=Area of top= $(side)^2=x^2$

Area of one side face= $l\times b=xy$

Cost of bottom=$9 per square ft

Cost of top=$5 square ft

Cost of sides=$4 per square ft

Total cost=$204

Volume of rectangular box= $V=lbh=x^2y$

Total cost= $9(x^2)+5x^2+4(4xy)=14x^2+16xy$

$204=14x^2+16xy$

$204-14x^2=16xy$

$y=\frac{204-14x^2}{16x}=\frac{102-7x^2}{8x}$

Substitute the values of y

$V(x)=x^2\times \frac{102-7x^2}{8x}=\frac{1}{8}(102x-7x^3)$

Differentiate w.r.t x

$V'(x)=\frac{1}{8}(102-21x^2)=0$

$V'(x)=0$

$\frac{1}{8}(102-21x^2)=0$

$102-21x^2=0$

$102=21x^2$

$x^2=\frac{102}{21}=4.85$

$x=\sqrt{4.85}=2.2$

It takes positive because side length cannot be negative.

Again differentiate w.r. t x

$V''(x)=\frac{1}{8}(-42x)$

Substitute the value

$V''(2.2)=-\frac{42}{8}(2.2)=-11.55$

Hence, the volume of box is maximum at x=2.2 ft

Substitute the value of x

$y=\frac{102-7(2.2)^2}{8(2.2)}=3.87 ft$

Greatest volume of box= $x^2y=(2.2)^2\times 3.87=18.73 ft^3$

5 0

3 years ago

Solve for the unknown x-5=6

frosja888 [35]

Answer:

Step-by-step explanation:

x-5+5=6+5

x=11

so answer is 11

8 0

3 years ago

Read 2 more answers

Guys plz help me with a few problems

trasher [3.6K]

It probably gos like this here's my answer for number 1 6/8 and 9/12. for number 3, 10/12 and 15/18.

4 0

3 years ago