Show all of your work. Simplify the expression: - 3a + 7 + 5a​

Answer:

im not good with math sorry :(

Step-by-step explanation:

Answer:

d

Step-by-step explanation:

[tex]x 1= \frac{ - b + \sqrt{ {b}^{2} - 4ac} }{2a} \\ x2 = \frac{ - b - \sqrt{ {b}^{2} - 4ac} }{2a} \\ x1 = \frac{ - 2 + \sqrt{ {2}^{2} - 4\times 1 \times ( - 3)} }{2} = 1 \\ x2 = \frac{ - 2 - \sqrt{ {2}^{2} - 4 \times 1 \times ( - 3)} }{2} = - 3[/tex]

Answer:

d

Step-by-step explanation:

Solving by factorising

Given

x² + 2x - 3 = 0 ← in standard form

(x + 3)(x - 1) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 3 = 0 ⇒ x = - 3

x - 1 = 0 ⇒ x = 1

Answer:

34.1 is the answer by Pythagoras thereom

angle TS = 74°

Straight line is 180°, so add PT and SR

(64+42 = 106)

Subtract 180 from 106, you get 74 :)

Answer:

I might not be right but try following the steps in the screen shot

Also the answer is in the screenshot

Step-by-step explanation:

I tried my best. :>

Answer:

B

Step-by-step explanation:

26x82=2132

2132/2=1066

Answer:

1st question:  C

2nd question: Increasing (the slope)

3rd question:  don't understand what's being asked

Step-by-step explanation:

Answer:

the answers are

Step-bythe answers are -step explanation:

1.C

2.a

3.B

Answer:

392in

Step-by-step explanation:

find the areas of all the sides of this shape. Of one you might have to split it into two shpaes.

Answer:

(33 - 5)/7 = 4

Step-by-step explanation:

Answer:

1 is 105°

2 is 75°

Step-by-step explanation:

75° and angle 2 are corresponding angles(equal)

angles on straight line sum up to 180°

let x be angle 1

x+ 75= 180

x =180-75

x= 105°

Answer:

1. is 105

2. 75 degrees

Step-by-step explanation:

Answer:

The answer is 44 cm .

which is (B)

Answer:

3 -14x =17

-14x = 17 - 3

-14x = 14

x = 14/-14 = 1/-1 = -1

∴ answer = -1

hope this answer helps you.....

please mark as brainliest... thank you!

Answer:62.5%

Step-by-step explanation:

Answer:

The rocket will hit the ground after about 8.20 seconds.

Step-by-step explanation:

The height of the rocket y, in feet, x seconds after launch is modeled by the equation:

[tex]y=-16x^2+121x+83[/tex]

We want to find the time at which the rocket will hit the ground.

If it hits the ground, the height of the rocket y will be 0. Thus:

[tex]0=-16x^2+121x+83[/tex]

We can solve for x. Factoring (if possible at all) or completing the square can be tedious, so we can use the quadratic formula:

[tex]\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]

In this case, a = -16, b = 121, and c = 83. Substitute:

[tex]\displaystyle x=\frac{-(121)\pm\sqrt{(121)^2-4(-16)(83)}}{2(-16)}[/tex]

Simplify:

[tex]\displaystyle x=\frac{-121\pm\sqrt{19953}}{-32}[/tex]

Divide everything by -1 and simplify the square root. The plus/minus will remain unchanged:

[tex]\displaystyle x=\frac{121\pm3\sqrt{2217}}{32}[/tex]

Therefore, our two solutions are:

[tex]\displaystyle x=\frac{121+3\sqrt{2217}}{32}\approx 8.20\text{ or } x=\frac{121-3\sqrt{2217}}{32}\approx -0.63[/tex]

Since time cannot be negative, we can ignore the second solution.

Therefore, the rocket will hit the ground after about 8.20 seconds.

Answer:

4

Step-by-step explanation:

-4x +6x +12 = 20

2x + 12 = 20

2x = 8

x = 4

Answer:

X=4

Step-by-step explanation:

-4x+6x+12=29

2x=8

x=4

Good luck .

Answer: 4 + 2w

Step-by-step explanation:

The height of the tomato plant in inches after w weeks will be the value of the current height plus the weekly growth pee week. This can be represented in an equation as:

h = 4 + 2(w)

h = 4 + 2w

For example, the height of the tomato plant in inches after 5 weeks will be:

h = 4 + 2w

h = 4 + 2(5)

h = 4 + 10

h = 14 inches

Answer: x=3

Step-by-step explanation:

Answer:

-18

Step-by-step explanation:

[tex]-4(-2)+\frac{(-12)}{+3}-20+(+4)+(-6)=8-\frac{12}{3}-20+4-6=8-4-20+4-6=-18[/tex]

Answer:

Step-by-step explanation:

-4(-2)+(-12)÷(+3)+-20+(+4)+(-6). [B.E.D.M.A.S rule] (First bracket)

= 8 - 12 ÷ 3 - 20 + 4 - 6. (Then division)

= 8 - 4 - 20 + 4 - 6. (Then after addition)

= 8 + 4 - 4 - 20 - 6

= 12 - 30. (At last subtraction)

= -18 (Ans)

To find the percent of something, turn the percent into a decimal and multiply (move the decimal place 2 places left, e.g. 53% = .53)

Answer: The third choice.

Step-by-step explanation: To find the first output, start with your first input. In this case, it's -2, so your equation would be g(-2)= -1/2(4(-2)+6). Start by solving inside the parenthesis. 4x-2=-8 and -8+6=-2. -1/2x-2= 1, so your first output should be 1. The only choice that has this is the third one, so that is your answer. Hope I could help :)

Answer:

your answer is...

Step-by-step explanation:

50.265482457437

I used my calculator

Answer:

15 (C)

//msg added cus it was short//

Answer:

x = 5

Step-by-step explanation:

Given

- 3x - 2 = - 17 ( add 2 to both sides )

- 3x = - 15 ( divide both sides by - 3 )

x = 5

Answer:  C.

brainliest plz

Step-by-step explanation:

y=2x+3

substitute in x

y=(2*0)+3

y=0+3

y=3

Answer:

In rational numbers, both numerator and denominator are whole numbers, where the denominator is not equal to zero. A irrational number is a number which cannot be expressed in a ratio of two integers

Step-by-step explanation:

Answer: reflection over the y axis

Step-by-step explanation:

Answer:

The Foster–Greer–Thorbecke indices are a family of poverty metrics. The most commonly used index from the family, FGT2, puts higher weight on the poverty of the poorest individuals, making it a combined measure of poverty and income inequality and a popular choice within development economics.

Step-by-step explanation:

0000000

Answer:

Here's a calculator  link hope it helps : )

Step-by-step explanation:

https://www.mathpapa.com/algebra-calculator.html

Answer:

R y-axis (x,y) to (-x,y)

Step-by-step explanation:

The  rule for reflection is [tex]r_y[/tex] axis (x, y) -> (-x, y).

A transformation is a broad phrase covering four distinct methods of changing the shape and/or position of a point, line, or geometric figure.

The original shape of the object is known as the Pre-Image, and the final shape and location of the object is known as the Image during the transformation.

As per the figure. the coordinates of Triangle LMN are

L(-6, 2),

M(-5, 4)

N(-3, 2)

and, the coordinates of Triangle L'M'N' are

L'(6, 2),

M'(5, 4)

N'(3, 2)

Here, the y coordinate is same only the sign of x coordinate change.

So, the rule for reflection is r y- axis (x, y) -> (-x, y).

Learn more about Transformation here:

https://brainly.com/question/13801312

#SPJ7