PLEASE HELP ME I REALLY NEED IT

Answer:

3x^2 +8x -10=-8

Step-by-step explanation:

A quadratic equation is

ax^2 + bx +c=0

has a formula

-b ± sqrt( b^2 -4ac)

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

  2a

We know a = 3   b = 8 and c = -2

3x^2 +8x -2=0

Subtract 8 from each side

3x^2 +8x -2 -8=0-8

3x^2 +8x -10=-8

That is choice C

Answer:

C.

Step-by-step explanation:

Consider equation C:

3x^2 + 8x - 10 = -8

3x^2 + 8x - 2 = 0

Here a = 3, b = 8 and c = -2

Applying the quadratic formula:

x  = [-b +/-  √(b^2 - 4ac)] / 2a

x = [-8 +/- √(4(3)(-2)] / 2(3)

- which is the one in the question.

So it is equation C.

Answer:

y=2x+8

Step-by-step explanation:

All of the choices are in slope-intercept, or y=mx+b form where m is the slope and b is the y intercept. Therefore if the slope is 2, and the y intercept is 8 the equation should be y=2x+8.

Answer:

Step-by-step explanation:

C

Answer:

C

Step-by-step explanation:

2/10 1/9

Answer:

Step-by-step explanation:

surface area of cylinder=2πrh

SA=1/2×2×π×3×25+2 ×(1/2×π×3²)=75π+9π=84π≈84×3.14≈263.76 cm²

if lowerside is also counted  then area of lower side=25×6=150

total surface area=263.76+150=413.76 cm²

if we take π=22/7

84 π=84×22/7=12×22=264 cm²

if base is also counted then area=264+150=414 cm²

Answer:equal

Step-by-step explanation:

Answer equal

Step-by-step explanation:

Answer:

-35.0

Step-by-step explanation:

Answer:

-.35

Step-by-step explanation:

Answer:

w+5=7

Step-by-step explanation:

Answer:

Result at time x = 4 seconds the soccer ball hit the ground.

Step-by-step explanation:

At the moment just before the ball is kicked, it is on the ground and so the height f(x) is zero meters. After the kick, the ball goes through the air and it's path can be described by a (mountain) parabola.

So lets see after how many second (x) the height = 0 once again.

f(x) = 8x-2x^2

f(x) = 0

8x - 2x^2 = 0

Try to write the formula in two terms

-2x * (x - 4) = 0

When a product of two or more terms equals zero, then at least one of the terms must be zero.

Now solve each term = 0 separately, meaning, solve as many equations as there are terms in the product.

Any solution of term = 0 solves product = 0.

Solve the first term:

-2x = 0

Multiply left an right from the = singn with the factor -1 gives this outcome:

2x = 0

x = 0

Solve the second term:

x-4 = 0

x = 4

Result at time x = 4 seconds the soccer ball hit the ground.

x = 4

x = 0

Answer:

314.961

Step-by-step explanation:

Answer:

9.5

Step-by-step explanation:

Well the constant proportionality is 9.5 because that is what makes p directly proportional to a, because when h increases, a increases, and when h decreases, a decreases.

Answer:

X= 4 or -4. Brainliest would be appreciated if it’s correct :-)

Step-by-step explanation:

Answer: it’s -8

Step-by-step explanation:

hope this helps please award brainly

Answer: (-3,5),(3,2),(5,1)

Step-by-step explanation:

Answer:

ade

Step-by-step explanation:

the expression is 7 + (1/2)x which represents the phrase “seven more than half of a number option (C) is correct.

It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.

If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.

We have:

The algebraic expression represents the phrase:

“seven more than half of a number”

As we know, expression can be defined as the combination of constants and variables with mathematical operators.

Let y be the number:

y = 7 + (1/2)x

The above equation represents the linear equation.

Thus, the expression is 7 + (1/2)x which represents the phrase “seven more than half of a number option (C) is correct.

Learn more about the linear equation here:

brainly.com/question/11897796

#SPJ6

Answer:

16[tex]\pi[/tex]

Step-by-step explanation:

area of a circle is pi x r x r

since it is a quarter

1/4 x pi x 8 x 8 = 16 x pi

Answer:

formula = pi× r²× 1/4

Step-by-step explanation:

since radius = 8

3.14×8×8 = 3.14×16

4

therefore the answer is pi × 16

Answer:

The angle for the top of the triangle is 79. For the right corner would be 56. Then going to the bottom of the blue triangle vertice would be 75. The missing angle next to that one would be 55/

Step-by-step explanation:

Answer: The answer is 9

Step-by-step explanation:

It is 9 because 3x3x3x3 is basically 9x9 and 9x9 is 81, so 81 is the numerator. Then we gat to the denominator, which is 3x3 and 3x3 is 9. So the new fraction you get is 81/9, which is basically 81 divided by 9. 81 divided by 9 is 9.

Answer:

9

Step-by-step explanation:

Subtract 2 from the 4 exponents on the numeral, then multiply that exponent, which would be 3×3=9 .

Answer:

Step-by-step explanation:

[tex]-2\frac{1}{4}=\frac{-9}{4}\\\\-1\frac{1}{2}=\frac{-3}{2}\\\\[/tex]

-2 1/4  ÷ -1 1/2 =

[tex]\frac{-9}{4}*\frac{-2}{3}=\frac{3}{2}*\frac{1}{1}\\\\=\frac{3}{2}\\\\=1\frac{1}{2}[/tex]

Answer:

type the question picture isnt showing up

Step-by-step explanation:

Answer:

X = 50

Step-by-step explanation:

180-80=100. 100/2=50

50+50+80=180

All angles add,up to 180

Answer:

Answer 1: 15

Answer 2: 11.55

Answer 3: 1985

Step-by-step explanation:

its the answers on edge 2020

Answer:

First step will be option D.

Diameter of the smaller coin will be 2.45 cm

Step-by-step explanation:

Circumference of one coin = 8.03 cm

Circumference of the smaller coin = Circumference of the larger coin - 0.33

                                                         = 8.03 - 0.33

                                                         = 7.7 cm

Circumference of the smaller coin = 2πr = 7.7

r = [tex]\frac{7.7}{2\pi }[/tex]

r = [tex]\frac{7.7\times 7}{2\times 22}[/tex]

r = 1.225 cm

Diameter of the smaller coin = 2 × radius of the smaller coin

                                                = 2 × 1.225

                                                = 2.45 cm

Therefore, first step will be option D.

Diameter of the smaller coin will be 2.45 cm

Answer:

Think of it as the perimeter of the circle 

Answer:

the enclosing boundary of a curved geometric figure, especially a circle.

The circumference of a circle is related to one of the most important mathematical constants. This constant, pi

Step-by-step explanation:

Answer 190 square inches

Step-by-step explanation:

If there wasn't a piece cut off of the rectangle, you would multiply 22 by 15 because those are the side lengths. However, there is a piece missing so it will not have a great of an area. On the left side, it says that the width is 8 because part of the side is cut off. On the other side, it says 22. This shows that 14 inches is cut off. So width of the missing piece is 14. Then you need to find the length. On the bottom. It says the length is 5 where the top says 15. That shows that 10 inches are missing. That means the missing side is 14x10 which is 140 square inches. If the rectangle was a whole, it would be 330. You subtract 140 from that and it makes 190 square inches.

Answer:

190 square inches.

Step-by-step explanation:

here is my work to follow to figure out a problem like this.

Answer:

(x-2)(3x)+(x-2)(4)

When distributing you just break up the second parentheses and put the first parentheses infront of both of them, as it is shown in this answer.

Answer:

39

Step-by-step explanation:

To find the intervals you will need to find the lowest and highest numbers, in this case, it would be 1 and 35.  A general rule would be 5-7 intervals, I will use 5.

Here are the intervals with the number of people that were in each:

1-7 (9)

8-14 (14)

15-21 (8)

22-28 (3)

29-35 (5)

14+9+8+3+5=39

Answer: Choice A) the total number of atoms cannot change during a reaction

Matter cannot be created or destroyed. Instead, matter can be rearranged from one form to another. For example, boiling water turns the liquid into gas (steam) when it evaporates. The H2O molecules haven't been created or destroyed.

Answer:

12.6 = RU

Step-by-step explanation:

Using trig functions

Sin theta = opp/ hyp

sin 37 = RU/ RN

sin 37 = RU / 21

21 sin 37 = RU

12.63811549 = RU

To the nearest tenth

12.6 = RU