Evaluate a2 − 2b for a = 2 and b = −4.

Answers

Answer 1
a^2 - 2b
2^2 - 2(-4)
4 + 8
12

Hope this helps!!!!

Related Questions

Simplify (use only positive exponents) : (3y^10)(2y^2)/8y^5

please explain how you did it so that I can understand what I'm doing <3

Answers

When multiplying variables with exponents, all you have to do is to add the exponents and that’s the ‘product.’

So;

(3y^10)(2y^2) is equal to (3)(2)(y^10+2).

6y^12/8y^5


When dividing exponents, you do the opposite and subtract the exponents. And you divide the whole number by half.


6y^12/8y^5 = 3y^7/4

How are sedimentary rocks changed into metamorphic rocks?

A.
weathering and erosion

B.
melting

C.
cooling

D.
heat and pressure

Answers

Answer:

D. : Heat and Pressure

Step-by-step explanation:

(Before I explain, I think this question belongs to Science category, and not Mathematics. :)

3 factors turn sedimentary to metamorphic rocks. Heat, Pressure, and Chemical Active Fluids which formed.

for this graph, mark the statements that are true​

Answers

A and b


Hope this helps!!!!!


Brainliest plzzzz

Use the Distributive Property to simplify the expression.
3(x+10)

Answers

Answer:

[tex]3x + 30[/tex]

3 times x +3 times 10

Hi, let me help you out!

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

In order to simplify this expression, we will use the Distributive Property:

—> a(b+c)=ab+ac

Simplify:

3(x+10)

Multiply 3 times x and 10:

3x+30

Hence, we conclude that the answer is: 3x+30.

I hope it helps you! Have an awesome day.

Which shows the mixed number for 13/3?
4 1/3 or
1 3/3 or
4 2/3

Answers

Answer:

Answer vary :

4 1/3

Step-by-step explanation:

Which number is located between 1.2 and 1.4 on the number line

A) 1.19
B) 1.44
C) 1.22
D) 1.03​

Answers

Answer:

D) 1.03 (is the answer)

Step-by-step explanation:

A. ■(1.19) is not in between 1.2 and 1.4 this is wrong. B. ■(1.44) is not in between 1.2 and 1.4 this is wrong. C. ■(1.22) is not in between 1.2 and 1.4 this is wrong.D. ■(1.03) is between 1.2band 1.4 this is correct

A refrigerator costs $429 to buy and its label says that estimated energy costs are $43 per year. Another brand costs $399, but its energy costs are $48 per year. If x is the years of ownership and y is the total dollars spent, write the ordered pair (x,y) that shows at what point the owner would have spent the same amount of money on either brand.

Answers

Answer:

(6, 687)

Step-by-step explanation:

Express answer in exact form.

A segment of a circle has a 120° arc and a chord of 8√3in. Find the area of the segment.

Answers

3749.4 838.638 the answer is

Which of the following is a verbal
description of this expression?
2 – 3
B
А
Three less
than a number
An unknown
quantity less
than three.

Answers

Answer:  Three less than a number

Step-by-step explanation: z-3 means the three is subtracted from the unknown number.

An unknown quantity less than three. would be 3 - z or  z < 3

Answer:

A.) Three less than a number

Step-by-step explanation:

Which of these equations is correct when x = -2?
A
x + 8 = 5
B
3x - 1 = -10
C
2x - 7 = -11
D
-95x = -190

Answers

Answer:

C

Step-by-step explanation:

just plug it into a calc

Answer:

C: 2x - 7 = - 11

Step-by-step explanation:

If you insert -2 into the place of "x", you will have 2(-2) - 7.

2(-2) = -4, and -4 - 7 = -11.

i need help!!!!!!!!!!!! whats 100x200x100x300x000*1333x3000

Answers

Answer:

the awnser is zero

Step-by-step explanation: i am 100% sure

Just put it in a Calculator

Solve for a.
a
3
9
a =
= ✓ [?]
Pythagorean Theorem: a2 + b2 = c2
Enter

Answers

Answer:[tex]\sqrt{72}[/tex]

Step-by-step explanation:

[tex]a^2+b^2=c^2\\a^2+3^2=9^2\\a^2+9=81\\a^2=72\\a=\sqrt{72}[/tex]


Express (81^1/4)^3
in simplest radical form.

Answers

Your answer in simplest radical form would be 531441/64

50 POINTS IF YOU CAN ANSWER.

What is the product of 1/4x-1/2 and 5x^(2) - 2x + 6? Write your answer in standard form. Show your work. Please this is due by tomorrow :c

Answers

Solution:

(4x2 - 2x) - (-5x2 - 8x)

= 4x2 - 2x + 5x2 + 8x.

= 4x2 + 5x2 - 2x + 8x.

= 9x2 + 6x.

= 3x(3x + 2).

Answer: 3x(3x + 2)

Solution:

(4x2 - 2x) - (-5x2 - 8x)

= 4x2 - 2x + 5x2 + 8x.

= 4x2 + 5x2 - 2x + 8x.

= 9x2 + 6x.

= 3x(3x + 2).

Answer: 3x(3x + 2)

Solution:

(4x2 - 2x) - (-5x2 - 8x)

= 4x2 - 2x + 5x2 + 8x.

= 4x2 + 5x2 - 2x + 8x.

= 9x2 + 6x.

= 3x(3x + 2).

Answer: 3x(3x + 2)

(Please I will mark BRAINLIEST, not lie)Use this equation to solve for the missing variable:
y = 8x + 12


If x = -6, y = _____

If y = 13, x = _____

Answers

y = 8x + 12

if x = -6

y = 8(-6) + 12

y = -48 + 12

y = - 36


if y = 13

13 = 8x + 12

13-12 = 8x

8x = 1

x = ¹/₈ ≈ 0.125

Answer:

If x = -6, y = -36

If y = 13, x = [tex]\frac{1}{8}[/tex]

Step-by-step explanation:

There is one equation and are asked to find x and y if there is a certain value to substitute either x or y.

Let's start with x, we know that x = -6. Meaning that we need to subtitute x for -6. Do as followed :

y = 8(-6) + 12

y = -48 + 12

y = -36

Now do y, we know that y is 13. Meaning that we need to substitute y for 13. Do as followed :

8x + 12 = 13

We need to isolate x alone, so do as followed :

Subtract 12 from both sides to get 8x alone :

8x = 1

Divide 8 from both sides to get x alone :

x = 1/8

A figure is shown.

What is the measure, in degrees, of PLEASE HELP ME

Answers

the answer is 121 degrees

explanation: 59+4x=180
4x=121
121 would be that angle and the other side as well because 59+121=180



hey so don’t trust me on this but i’m like 95 percent sure it’s right

Solve the equation for all real solutions in simplest form.
3z^2+17z+16=0

Answers

Answer:

[tex]x=\frac{-17+\sqrt{97}}{6}[/tex], [tex]x=\frac{-17-\sqrt{97}}{6}[/tex]

Step-by-step explanation:

Use the quadratic formula to solve for all real solutions.

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

Plug in and solve:

[tex]x=\frac{-17\pm\sqrt{17^2-4(3)(16)}}{2(3)}\\\\x=\frac{-17\pm\sqrt{289-4(3)(16)}}{2(3)}\\\\x=\frac{-17\pm\sqrt{289-12(16)}}{2(3)}\\\\x=\frac{-17\pm\sqrt{289-192}}{2(3)}\\\\x=\frac{-17\pm\sqrt{97}}{6}\\[/tex]

Since that's the farthest we can simplify to, your answers would be the positive and negative versions of the expression:

[tex]x=\frac{-17+\sqrt{97}}{6}[/tex]

and

[tex]x=\frac{-17-\sqrt{97}}{6}[/tex]

Which quadrilateral is a trapezoid?

Quadrilateral A B C D is shown. Sides A B and D C are parallel. Sides A D and B C have different length measures. Angles A and D are right angles.
Quadrilateral E F G H is shown. Sides F E and G H are congruent. Angles E and H have different measures.
Quadrilateral J K L M is shown. Sides J K and L M are parallel. Sides K L and J M are parallel.
Quadrilateral N O P Q is shown. Sides O N and N Q are congruent. Sides O P and P Q are congruent.

Answers

Answer:

A.   Quadrilateral A B C D is shown. Sides A B and D C are parallel. Sides A D and B C have different length measures. Angles A and D are right angles.

Step-by-step explanation:

Edge 2021

Answer:

its a

Step-by-step explanation:

100% on edge 2021

The perimeter of a rectangle is 36 feet. The length is 2 less than 3 times the width. What is the length? What is the width?

Answers

Width = x
Length = 3x-2

(3x-2)*2+2x= 36
6x-4+2x = 36
8x-4 = 36
8x/8 = 40/8
x = 5

Width = 5
Length = 3*5-2 = 13


Find A, B so that y = A sin(2) + B cos(2) is a solution to the differential equation
4y'' +y' + 5y = 2 cos(x).
A=
BE
Submit Question

Answers

If y = A sin(x) + B cos(x), then

y' = A cos(x) - B sin(x)

y'' = -A sin(x) - B cos(x)

Substitute these into the ODE:

4y'' + y' + 5y = 2 cos(x)

4 (-A sin(x) - B cos(x)) + (A cos(x) - B sin(x)) + 5(A sin(x) + B cos(x)) = 2 cos(x)

(-4A - B + 5A) sin(x) + (-4B + A + 5B) cos(x) = 2 cos(x)

(A - B) sin(x) + (A + B) cos(x) = 2 cos(x)

Then

A - B = 0

A + B = 2

Adding these equation gives

(A - B) + (A + B) = 0 + 2

2A = 2

A = 1   →   B = 1

| -11|>2 true or false

Answers

Answer:

Step-by-step explanation:

niet waar -11 is negatief

Can someone please help

Answers

the answer would be 3,2,4,1

8(-3/2x+6)=-9(4/3x-8)

Answers

the answer is 0=24 hope this helped

I need this please help me

Answers

Answer:

-14 beacuse thats what it all adds up to

what is 295 cents in dollars???​

Answers

Answer:

$2.95

Step-by-step explanation:

Reuben invested his savings in two investment funds. The $18,000 that he invested in Fund A returned a 5% profit. The amount that he invested in Fund B returned a 1% profit. How much did he invest in Fund B, if both funds together returned a 4% profit?

Answers

Answer:

He invested $13500 in fund A, and $4500 in Fund B

Step-by-step explanation:

maths

What is the sum of 13.75 and -11.25 ? Show your
work

Answers

Here goes the answer. Hope it helps you.

Answer:

Step-by-step explanation:

2.5

True or false?

The length of the intercepted arc is equal to the circumference of the circle.

Answers

Answer:

True

Step-by-step explanation:

i’m sure the arc is just a piece of the circumference so false

3. Con la finalidad de contar con un alimento para animales con un valor nutritivo
más alto que el maíz común, un grupo de expertos comparan dos nuevas varie-
dades de maiz con un contenido de aminoácidos modificado llamadas opaca-2
y harinoso-2, con maíz común. Los investigadores mezclan maíz y soya para ali-
mentar animales, con 12%, 16% y un 20% de proteina. Suministran diariamente
este alimento compuesto a 10 pollos machos y anotan su aumento de peso al
cabo de 21 días. El aumento de peso de los pollos es una medida de valor nutri-
tivo del contenido del alimento, que se suministra. De acuerdo a lo anterior iden-
tifica ¿Cuál es la variable dependiente?. ¿Cuál es la variable independiente?, y
el aumento de peso que sería?
13
on qué conocimientos cuento?

Answers

What I don’t speak that language im sorry

PLEASE HELP ASAP DUE VERY SOON

Answers

Answer:

your answer will be A'B'/AB=3/1=3

Step-by-step explanation:

i hope this helps you

Answer:

3 is the correct answer......

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