9+4f-7z use f=6 and z=5

Answer:

x=1.7320508075688772 or x=−1.7320508075688772

Step-by-step explanation:

(x2−3)(x2+12)=0

x4+9x2−36=0

(x2−3)(x2+12)=0

x2−3=0 or x2+12=0

x=1.7320508075688772 or x=−1.7320508075688772

Answer:

See solutions below

Step-by-step explanation:

1) Total amount of gallons = 14 gallons

If she uses up 0.75 gallons of gas each hour then;

1 hour = 0.75gallons

after driving 6 hours, amount of gallons used will be;

6 hours = x

Divide both expressions

1/6 = 0.75/x

x = 6 * 0.75

x = 4.5gallons

Amount of gas left = 14 - 4.5 = 9.5 gallons of gas

Hence 9.5 gallons of gas will be left after 6 hrs

Similarly;

1 hour = 0.75gallons

after driving t hours, amount of gallons used will be;

t hours = x

x = 0.75t

Amount of gas left after t hours = (14 - 0.75t) gallons of gas

2) We are to find the sum of -8x^2+3 and -9x^2+3x-3

-8x^2+3 + (-9x^2+3x-3)

= 8x^2+3 -9x^2+3x-3

Collect like terms

=  8x^2 -9x^2+3x + 3-3

= -x^2 + 3x

Hence the sum is -x²+3x

3) Expressing in standard form;

(-3x-5)(-x^2+x-5)

Expand

= 3x³-3x²+15x+5x²-5x+25

Collect like terms

= 3x³-3x²+5x²+15x-5x+25

= 3x³+2x² + 10x + 25

Hence the product in polynomial form is 3x³+2x² + 10x + 25

Answer:

x = (3, 4)

(I'm assuming the missing sign in the picture is a negative (-))

Answer:

x={3, 4}

Step-by-step explanation:

that may answer po

Answer:

A.) [tex]2x^2 + 13x - 7[/tex]

B.) [tex]3x^2 - 11x - 20[/tex]

C.) [tex]y^2 + 13y + 36[/tex]

D.) [tex]b^2 - 15b + 36[/tex]

Step-by-step explanation:

For all of these you want to multiply the first thingy (Ex. x) in the first parenthesis by the first in the second parenthesis (Ex. 2x) plus the first one in the first (Ex. x) times the second one in the second (Ex. -1) plus the second one in the first one (Ex. 7) times the first one in the second parenthesis (Ex. 2x)  plus the second one in the first parenthesis (Ex. 7) times the second one in the second (Ex. -1)

A.) (x + 7)(2x - 1) = (2x * x) + (-1 * x) + (7 * 2x) + (7 * -1) = 2x^2 -x + 14x - 7 = 2x^2 + 13x - 7

B.) (3x + 4)(x - 5) = (3x * x) + (3x * -5) + (4 * x) + (4 * -5) = 3x^2 - 15x + 4x - 20 = 3x^2 - 11x - 20

C.) (y + 9) (y + 4) = (y * y) + (4 * y) + (9 * y) + (9 * 4) = y^2 + 4y + 9y + 36 = y^2 + 13y + 36

D.) (b - 12)(b - 3) = (b * b) + (b * -3) + (-12 * b) + (-12 * -3) = b^2 - 3b - 12b + 36 = b^2 - 15b + 36

Answer:

FV= $2,041.29

Step-by-step explanation:

Giving the following information:

Initial investment (PV)= $1,500

Number of periods (n)= 7 years

Interest rate (i)= 4.5% = 0.045

To calculate the future value, we need to use the following formula:

FV= PV*(1+i)^n

FV= 1,500*(1.045^7)

FV= $2,041.29

Answer:

It is actually -1.

Step-by-step explanation:

((-3) / 5) + ((-2) / 5) her problem should be set up like this. She just plain out did -3/5+-2/5 and that is not what your supposed to do.

pls mark me brainliest

Answer:

-5/5= -1

Step-by-step explanation:

-3/5 + -2/5 = -5/5

when u have to add 2 minus values it shuld not be subtracted by each other but added instead and put the (-) sign infront of the final value as given above.

Answer:

I believe communist just because or there influences in world war I and world war II they were on the communist side and part of the USSR at the time

Answer:

4,400

Step-by-step explanation:

Answer:

Leena walked 5/7 miles with her friend

Step-by-step explanation:

7/7 = 1

7 +4 =11

Answer:

5/7

Step-by-step explanation:

Answer:

278

Step-by-step explanation:

139x2=278

Answer:

18.33

Step-by-step explanation:

600 -50 ÷ 30

550 ÷30 = 18.333

Answer:

35 OR 35.1666666667

Step-by-step explanation:

Answer:

the answer rounded to the nearest hundredth is 35.17

Step-by-step explanation:

Answer:

x = 21

Step-by-step explanation:

Add all the angles to get 138 + 2x = 180. Subtract 138 to get 2x = 42. x = 21

Answer:

x = 21

Step-by-step explanation:

Can I have brainliest?

Answer:

Step-by-step explanation:

x=2

a=1.25

m=3.75

tell me if u need any steps

Answer:

[tex]P(A \cup B) =0.45[/tex]

Step-by-step explanation:

From the question we are told that

Consumers seen the soap [tex]P_A=40\% =0.40[/tex]

Consumers used the soap [tex]P_B=20\% =0.2[/tex]

Consumers seen/tried the soap [tex]P_x=15\% =0.15[/tex]

Generally the probability that consumers have seen and tried the soap is

[tex]P(A \cup B=P(A)+P(B)-P(A \cap B[/tex]

[tex]P(A \cup B=0.4+0.2-0.15[/tex]

[tex]P(A \cup B) =0.45[/tex]

Answer:

0.19 = 19/100

19/100 = 19%

Step-by-step explanation:

take 0.19 x 100 = 19

that's where u get 19% and 19 over 100 from.

Answer:

0.19 = 19/100 = 19%

Step-by-step explanation:

1. Start with 0.19 (the given)

2. Read it out loud "19 hundredths"

3. Write down 19 out of 100 because that's what you said in the last step (if it were "0.3" you would write "3/10" because you read it as "three tenths"

4. Check if you can simplify. In this case you cannont

5. If the fraction is out of 100 (which in this case it is) simply write the numerator as the percent "19" is the numerator and it IS out of 100. You would write 19%

Answer:

ecb and acb

Step-by-step explanation:

Answer:

17.9140127389 FT²

Step-by-step explanation:

Circumference is found using the formula 2πr.

15=2πr

r=15/(2*3.14)

r=2.38853503185

Area is found using the formula πr²

A= πr²

=3.14( 2.38853503185²)

=17.9140127389

Answer:

[tex] x = 6\sqrt{2}[/tex]

Step-by-step explanation:

Reference angle = 45°

Adjacent side = 6

Hypotenuse = x

Applying trigonometric ratio, we have:

[tex] cos(45) = \frac{6}{x} [/tex]

Multiply both sides by x

[tex] x*cos(45) = 6 [/tex]

Divide both sides by cos(45)

[tex] x = \frac{6}{cos(45)} [/tex]

[tex] x = \frac{6}{\frac{\sqrt{2}}{2} [/tex] (cos 45 = √2/2)

[tex] x = \frac{6}*{\frac{2}{\sqrt{2}} [/tex]

[tex] x = \frac{12}{\sqrt{2}} [/tex]

Rationalize

[tex] x = \frac{12*\sqrt{2}}{\sqrt{2}*\sqrt{2} [/tex]

[tex] x = \frac{12*\sqrt{2}}{2} [/tex]

[tex] x = \frac{6*\sqrt{2}}{1} [/tex]

[tex] x = 6\sqrt{2}[/tex]

Answer:

The company will pay $43 project fee and $24 an hour.

Step-by-step explanation:

25 + 10h +18 + 14h

= 25+ 18 + 10h + 14h

=43 + 24h

Answer:

i think its a but im not sure

Answer:

For the rectangular area, we will have a length L, and a width W, such that the two sides with measure L and one with measure W will be made with the material of $4 per ft, and the other side with measure W will be made with the material that costs $13 per ft.

Then the total cost will be:

C = (L + L + W)*$4 + W*$13.

And we know that the area is equal to 240 ft^2, then:

240ft^2 = L*W

To solve this, the first step is to isolate one of the variables in the second equation. I will isolate L:

L = (240ft^2)/W

Now we can replace this in the first equation to get:

C =  ( 2*(240ft^2)/W + W)*$4 + W*$13.

C = $4*480ft^2/W + W*$17

Now we want to find the minimum of this function, then we need to look at the zero of the first derivative of C:

C' = - ($4*480 ft^2)/W + W*$17 = 0

- ($4*480 ft^2) + $17*W^2 = 0

Let's solve this for W:

$17*W^2 =  ($4*480 ft^2)

W^2 = ($4*480 ft^2)/$17 = 112.94ft^2

W = √(112.94 ft^2) = 10.63 ft.

Then the width must be 10.64 ft, and the length can be obtained with the equation:

L*W = 240 ft^2

L*10.64 ft = 240 ft^2

L = (240 ft^2)/10.64ft = 22.56 ft

The width is 10.64 ft, and the length is 22.56 ft