help please, find the solution(s) for x In the equation below.
x2 + 7x = 8
OA. x = -1; x = 8
ОВ. x = 1; x = 8
OC. x = 1; x = 8
OD. x = -1; x = -8

Answer:

37.68 yards

Step-by-step explanation:

Circumference = π x diameter

So if you pull in the numbers to the formula...

circumference = 12 x 3.14

37.68 = 12 x 3.14

Solution:

Note that:

Simplify the equation to find x.

Add 10 both sides.

Subtract 3x both sides.

Divide 3 both sides.

Answer:

Step-by-step explanation:

opposite angles = equal angles

we solve with a proportion

3x + 50 = 6x - 10

50 + 10 = 6x - 3x

60 = 3x

x = 60 : 3

x = 20

Answer:

D. Knowing that 5^2 + 9^2 < 12^2, draw the 5 cm side and the 9 cm side

with a right angle between them. The 12 cm side will fit to form a

right triangle

Step-by-step explanation: mark me brainliest!!

Hypotenuse = h

Altitude = lBase = bl²+b²=h²

Here 6²=369²=8112²=14415²=225

From the above it is clear that81+144=225⇒9²+12²=15²

Answer:

80 cm

Step-by-step explanation:

perimeter = Side × 4 = 20 × 4 = 80 cm

I hope you understand...

Answer:

√384 esa es la respuesta ayudame a mi porfa

Answer:

3

Step-by-step explanation:

1(8)+2(16)+3(24)+4(32) ÷ 8+16+24+32

8+32+72+128÷ 8+16+24+32 = 240÷80 = 3

Answer:

28687.5

Step-by-step explanation:

Un gramo equivale a $38,25, por lo que si tenemos 750 de esos gramos, tendríamos que multiplicarlos para obtener el costo total.

Answer:

B

Step-by-step explanation:

because 4 plates multiplied by 9 equals 56 and 5x9=45. Therefore you need to multiply both 6 and 7 by 9 to get your answer. I hope I'm right. :)

Answer:

Its A

Step-by-step explanation:

Answer:

10

Step-by-step explanation:

g(f(x)) = g(3x² - 4) = 2(3x² - 4) - 6

so

g(f(2) = 2(3*2² - 4) - 6 = 2*8 - 6 = 16 - 6 = 10

Answer:

22

Step-by-step explanation:

We are given the expression:—

[tex]\displaystyle \large{5n-3}[/tex]

When n = 5, substitute/change n to 5:—

[tex]\displaystyle \large{5(5)-3}[/tex]

Evaluate:—

[tex]\displaystyle \large{25-3=\boxed{22}}[/tex]

__________________________________________________________

Summary

  Substitution

Changing or replacing from a term to another terms/expression is called substitution.

Examples:—

If we are given the expression [tex]\displaystyle \large{2y-1}[/tex] and we want to find the value when y = 4, simply replace y-term to 4.

[tex]\displaystyle \large{2(4)-1=8-1=\boxed{7}}[/tex]

__________________________________________________________

If you have any doubts regarding my answer/explanation, do not hesitate to ask in comment!

Answer : 4 Degrees Celsis​

Explanation : Use The Absolute Value

I  -4  I = 4

◊ YusuCr ◊

Answer: 4 degrees Celsius

Hope this helps!

Answer:

D. (2, -1)

Step-by-step explanation:

Answer:

20 miles per gallon

Step-by-step explanation:

We want a unit rate where

1 is in the denominator

so we divide top and bottom by 20

[tex]\frac{400 miles/20}{20 gallons/20}[/tex]  = [tex]\frac{20 miles}{1 gallon}[/tex] = 20 miles a gallon

Answer:

The answer is 234

Step-by-step explanation:

Hope it helps

Given :

[tex]{\qquad \sf \dashrightarrow y= 4x + 1 \: –––– \sf \: (i)}[/tex]

[tex]{\qquad \sf \dashrightarrow 3x + 2y = 13 \: –––– \sf \: (ii)}[/tex]

Now, Substituing the value of y in equation (ii) :

[tex]{\qquad \sf \dashrightarrow \: 3x + 2y = 13 }[/tex]

[tex]{\qquad \sf \dashrightarrow \: 3x + 2(4x + 1) = 13 }[/tex]

[tex]{\qquad \sf \dashrightarrow \: 3x + 8x + 2 = 13 }[/tex]

[tex]{\qquad \sf \dashrightarrow \: 11x + 2 = 13 }[/tex]

[tex]{\qquad \sf \dashrightarrow \: 11x = 13 - 2 }[/tex]

[tex]{\qquad \sf \dashrightarrow \: 11x = 11 }[/tex]

[tex]{\qquad \sf \dashrightarrow \: x = \dfrac{11}{11} }[/tex]

[tex]{\qquad \sf \dashrightarrow \bf \: x = 1 }[/tex]

Now, substituting the value of x in equation (i) :

[tex]{\qquad \sf \dashrightarrow y= 4x + 1}[/tex]

[tex]{\qquad \sf \dashrightarrow y= 4(1) + 1}[/tex]

[tex]{\qquad \sf \dashrightarrow y= 4 + 1}[/tex]

[tex]{\qquad \bf \dashrightarrow y= 5}[/tex]

Answer:

300 rxc icz ugv ddhhbs hhjo

Step-by-step explanation:

Thr solution to a system of equations when graphing is the point of intersection of teh lines

Solution:

It should be noted:

We can tell that:

This clearly tells us that the inequality is x > -1

In conclusion:

Option C is correct.

Answer:

The answer would be 20 because 2x2=4 right so 10x2=20

Step-by-step explanation:

Answer:

[tex]Please\ see\ attached\ photo[/tex]

Step-by-step explanation:

[tex]1.Plane\ is\ usually\ painted\ as\ a\ parallelogram,\ and\ the\ plane\ has\ infinite\ ductility.[/tex]

[tex]2.\ A\ line\ has\ no\ endpoints\ at\ both\ ends\ and\ can\ extend\ infinitely\ to\ both\ ends.[/tex]

[tex]3.\ Points\ are\ usually\ represented\ by\ dots[/tex]

[tex]4.\ Same\ as\ 3[/tex]

[tex]5.\ Same\ as\ 2[/tex]

I hope this helps you

:)

By comparing the figure with simpler shapes (rectangles and triangles) we will see that its area is 30ft^2.

The area of the figure will be equal to the difference between the area of a 5ft by 10 ft rectangle, and the area of the 3 triangles that can be formed.

The area of a 5ft by 10ft rectangle is:

A = 5ft*10ft = 50ft^2

For the 3 triangles we have:

2 triangles with a base of 5ft - 3ft = 2ft, and a height of 10ft/2 = 5ft.

(these are the two left triangles).

Remember that for a triangle of base b and height h, the area:

A = b*h/2

Then for each of these triangles, the area is:

A' = (2ft*5ft)/2 = 5ft^2

And we have two of these, so the areas add up to 10ft^2.

For the right triangle, we can see that its base measures 10 ft, and its height is of 2 ft, then its area is:

A'' = (10ft*2ft)/2 = 10ft^2

Then the area of the figure is:

Area = A - 2A' - A'' = 50ft^2 - 2*(5ft^2) - 10ft^2 = 30ft^2

If you want to learn more about areas, you can read:

https://brainly.com/question/24487155

Answer:

y=x-40

Step-by-step explanation:

adding 2 on both sides....maybe

Answer:

8

Step-by-step explanation:

I simplified the fraction into a decimal (2.5) then proceeded to multiply it by 8 to compensate for each bag of chips.

Solution:

Note that:

Finding the area of the square.

Finding the area of the 2 triangles.

Since there are two triangles with the same base and height, we will multiply the area by 2 to cover the other triangle.

Finding the area of the trapezoid.

Answer:

a for the fist c  for 2 d for 3 and idontknow

4

Step-by-step explanation:

===================================================

Explanations:

Problem 1

v = 9i - 4j means we move 9 units to the right and 4 units down.

Another way to write this is v = <9, -4>

----------------------

Problem 2

R = (-19, 6)

S = (-35, 13)

Subtract x coordinates:  xS - xR = -35 - (-19) = -16

Subtract y coordinates: yS - yR = 13 - 6 = 7

Those results form the vector v = -16i + 7j

This vector indicates we move 16 units left and 7 units up when going from point R(-19,6) to point S(-35,13).

----------------------

Problem 3

t = -5i + 12j

||t|| = sqrt( (-5)^2 + (12)^2 )

||t|| = 13

theta = arctan(12/(-5))

theta = -67.38

Add on 180 to get to the proper quadrant Q2

-67.38 + 180 = 112.62

Therefore,

[tex]t = 13\bigg\langle \cos(112.62^{\circ}), \ \sin(112.62^{\circ})\bigg\rangle[/tex]

----------------------

Problem 4

The x, y components are the coefficients of the linear form.

This allows us to go immediately from <-39,16> to -39i + 16j

----------------------

Problem 5

P = (-5,11)

Q = (-16,4)

Subtract x coords: xQ - xP = -16 - (-5) = -11

Subtract y coords: yQ - yP = 4 - 11 = -7

The component form of vector t is <-11, -7> and this vector is in Q3.

r = sqrt(a^2 + b^2)

r = sqrt( (-11)^2 + (-7)^2 )

r = 13.038 is the approximate length of the vector.

theta = arctan(b/a)

theta = arctan(-7/(-11))

theta = 32.471

Add on 180 so we get to Q3

32.471+180 = 212.471

Therefore, we have

[tex]x = r\cos(\theta) = 13.038\cos(212.471^{\circ})\\\\y = r\sin(\theta) = 13.038\sin(212.471^{\circ})\\\\t = xi + yj\\\\t = 13.038\cos(212.471^{\circ})*i + 13.038\sin(212.471^{\circ})*j\\\\[/tex]

in which you could write into this slightly more compact form

[tex]t = 13.038\bigg\langle\cos(212.471^{\circ}),\sin(212.471^{\circ})\bigg\rangle\\\\[/tex]

For more info, check out polar to cartesian conversion formulas.