Find the value of 2x+y when x=4 and y=3

Find the value of a^2 + b when a= -2 and b=5

Answers

Answer 1

Answer:

2x +  y = 11

a² + b = 9

Step-by-step explanation:

I solved these by using order of operations and subsitution.


Related Questions

what is 186 over 31​

Answers

Use Photomath it’s a good app for math

Answer:

6

Step-by-step explanation:

g(x) = x² + 4x-1
Solve

Answers

Answer:

Using the quadratic formula:

x = [-4 +- sqr root (16 - 4 * 1 * -1)] / 2 *1

x = [-4 +- sqr root (20)] / 2

x1  = [-4 + sqr root (20)] / 2

x2 = [-4 - sqr root (20)] / 2

x1 = 0.23607

x2 = -4.2361

Step-by-step explanation:

Answer:

x = - 2 ± [tex]\sqrt{5}[/tex]

Step-by-step explanation:

Given

g(x) = x² + 4x - 1

To solve for x let g(x) = 0, that is

x² + 4x - 1 = 0 ( add 1 to both sides )

x² + 4x = 1

Using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(2)x + 4 = 1 + 4

(x + 2)² = 5 ( take the square root of both sides )

x + 2 = ± [tex]\sqrt{5}[/tex] ( subtract 2 from both sides )

x = - 2 ± [tex]\sqrt{5}[/tex]

Thus solutions in exact form are

x = - 2 - [tex]\sqrt{5}[/tex] , x = - 2 + [tex]\sqrt{5}[/tex]

The population of a South America country is about 17,400,000. Which expression shows this number in scientific notation?

Answers

Answer:

1.74x10^7

Step-by-step explanation:

you count how many times you moved the decimal to the right

can i have brainliest? i only need 2 more

Answer:

1.74x10^7

Step-by-step explanation:

if f(x) = 3x +2, g(x) = 4x, what is f(g(x)?

Answers

Answer:12x+2

Step-by-step explanation: the first step is to put g of x in f of x like this

3(4x)+2

Solve problem step by step 3(2x-4)=8

Answers

Answer:

x = 10/3

Step-by-step explanation:

3(2x-4) = 8

3*2x + 3*-4 = 8

6x - 12 = 8

6x = 8 + 12

6x = 20

x = 20/6

x = 10/3

Check:

3((2*10/3) - 4) = 8

3(20/3 - 4) = 8

20 - 3*4 = 8

20 - 12 = 8

1. Calculate the simple interest over an amount of N$ 2500 that is invested for 3 years and 6 months at a rate of 7% pa.​

Answers

Answer:

N$  612.5

Step by step explaination:

Given,

Principal or'P'=N$2500

Time or'n'=3 years & 6 months or 3.5 years

Rate of profit or 'r'=7% or 7/100

Profit or 'I'=?

_____________________________________

We know,

I=P*n*r

I=2500*3.5*7/100

I=612.5

So,simple interest is N$  612.5.

Out of these numbers which ones are multiples of 7 {−7, −4, 2, 14, 21, 34, 42}

Answers

Answer:

-7, 14, 21, and 42

Step-by-step explanation:

7•-1=-7

7•2=14

7•3=21

7•6=42

Evaluate k ^5 · m If k=2 and k=5

Answers

Answer:

32, 3125

Step-by-step explanation:

2^5=32 and 5^5=3125

A water ballon shaped like a sphere is filled with water.The water ballon has a diameter of 3 inches.Which measurement is closest to the volume of water in the water ballon in cubic inches?
A. 14.13 cu. in.
B. 3.53 cu. in.
C. 113.04 cu. in.
D. 3.33 cu. in.

Answers

Answer:

the answer is (A) 14.13 cu. in

Step-by-step explanation:

Is A 14.13

explanation divide by to get radius then use the formula   4/3πr to the third

When registering their cars, owners must identify the color that covers the largest portion of the vehicle. In one region, the probability that car was mainly white was 0.24, the probability that it was mainly silver was 0.22 and the probability that it was mainly black was 0.19. In this region, are the events "silver" and "black" mutually exclusive? Find the probability that a randomly selected car from this region is mainly silver OR mainly black.

Answers

Answer:

0.41 probability

Step-by-step explanation:

0.22 + 0.19 = 0.41

Answer:Yes they are mutually exclusive!

0.22 + 0.19 = 0.41

A car travels 200 ft before stopping.How many meters is this?

Answers

Answer:

the answer is 60.96

Step-by-step explanation:

*please give me brainliest, i only need four more*

HELPPPPPPP URGENT AGAIN.!!!! The coordinates of which point are (–3, –6)? point A point B point C point D

Answers

Answer:

Point C

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

Evaluate f(x) = 12 for the function f(x) = 5(x - 3) + 17

Answers

Answer:

62

Step-by-step explanation:

12-3=9

5x9=45

45+17=62

Answer:

f(12)= 62

Step-by-step explanation:

Plug 12 into x.

5(12-3)+17

45+17

= 62

what times what times what times what equals -5/24 i need two different ways please help

Answers

Answer:

;fjk;rofkfk;;fkslgl;fkfls'rfi;,dfei;se;feieirjeiljlaejre

sfe;jflejflseleijflskfeselselehf

Step-by-step explanation:

ueufaepfsfjseuefkeou;oiwrrsdkuijksgukuisdjyfekefaehkf

A statistics professor wants to know the average GPA of the students enrolled in their class. They look up information on Canvas about the students enrolled in the class and compute the average GPA as 3.29.a) trueb) false

Answers

Complete question :

A statistics professor wants to know the average GPA of the students enrolled in their class. They look up information on Canvas about the students enrolled in the class and compute the average GPA as 3.29

a. State whether the following statement is true or false. The population is all students enrolled in the accounting class.

b. Does the value 3.29 represent the population parameter or the sample statistic?

Answer:

True ; population parameter

Step-by-step explanation: The population comprises of all sets or participants relating to a study or experiment. For example, a population of male adults in the United States refers to the entire pool of adult population in the country. Hence, in the scenario above, the population refers to the entire student in the accounting class since the accounting class represents the entire pool of students.

B.) population parameter

Statistical estimates derived from a population is called the a parameter, since 3.29 represent the average score of the entire class.

Same statistic represents estimates derived from a sample (subset of the entire population).

Clear parentheses and combine like terms:​

Answers

Answer:

A. 14uv+7uv^2

Step-by-step explanation:

9uv+3u^2+5uv+4u^2

9uv+5uv+3u^2+4u^2

14uv+7uv^2

Hope this helps ;) ❤❤❤

The diameter of the Sun is 1.4 x 10⁶ km. The diameter of the planet mars is about 7000km. What is the approximate ratio of the diameter of the Sun to the diameter of Mars?

Answers

Answer:

200 : 1

Step-by-step explanation:

Given that,

The diameter of the Sun is 1.4 x 10⁶ km and the diameter of the planet mars is 7000 km.

We need to find the ratio of the diameter of the Sun to the diameter of Mars. Let the ratio is R. So,

[tex]R=\dfrac{\text{diameter of the Sun}}{\text{diameter of Mars}}\\\\R=\dfrac{1.4\times 10^6\ km}{7000\ km}\\\\R=\dfrac{200}{1}[/tex]

Hence, the ratio is 200:1.

Someone please help! :(

Answers

Answer:

See below.

Step-by-step explanation:

Start with triangle ABC with side BC lying on line n.

Draw a line through point A parallel to line n, and call it line m.

Angles 1 and 3 are alternate interior angle of parallel lines and are congruent.

Angle 2 and 4 are alternate interior angles of parallel lines and are congruent.

The sum of the measures of angles angles 1, BAC, and 2 is 180 since they lie on a line.

m<1 + m<BAC + m<2 = 180

Now we substitute in the angles we know are congruent by alternate interior angles (written above).

m<3 + m<BAC + m<4 = 180

Which is not a solution of 5(2x+4)[tex]\geq[/tex] 2(x+34)? pllllllzzzzzz i need this so much

Answers

I think it's help u so follow me and brainlist me if it's wrong then tell me

Write the sentence as an equation.
247 is equal to 144 more than the quantity 195 times v

Answers

Answer:

247 = 144 + (195 ⋅ v)

combine like terms: 11y-2x-10y-y+6x

Answers

Answer:1y+7x

Step-by-step explanation:

Answer:

4x

Step-by-step explanation:

11 y - 2 x - 10 y - y + 6 x . (Subtract all the y's first then the x's)

4x

2. Help with this pls

Answers

I believe the answer is A.

What is the sum1,000+2,000=

Answers

Answer:

3000

Step-by-step explanation:

1000 + 2000 = 3000

Step-by-step explanation:

sum1,000+2,000=3000.is yoir answer

x/8 = 3/4 solve for x

Answers

Answer: X= 6

Step-by-step explanation:

Answer:

x = 6

Step-by-step explanation:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other.

First, multiply 8 to both sides:

(x/8)8 = (3/4)8

x = (3 * 8)/4

First, divide 8 with 4:

x = 3 * (8/4) = 3 * 2

Finally, simplify by multiplying:

x = 3 * 2

x = 6

x = 6 is your answer.

~

(Giving Brailniest) What is 18x+20

Answers

Answer:

[tex]2(9x+10)[/tex]

Step-by-step explanation:

[tex]18x+20[/tex]

First, we have to factor. We will have to factor out 2 to get the answer(Factor out 2 from 18x+20).

Answer:

[tex]2(9x+10)[/tex]

Hope this helps!

Solve:
-8(x - 3) + 5x < 9(x + 12)
This is Algebra 1

Answers

Answer:

The answer is x > -7

Step-by-step explanation:

The starting out equation is:

-8(x - 3) + 5x < 9(x + 12)

Once you've got your equation down, you have to remove the parentheses by doing distributive property, and multiplying the -8 by x and -3, [-8(x-3)] and the 9 by x and 12, [9(x + 12)]

Once you do that, you have something like this:

-8x + 24 + 5x < 9x + 108

Then you have to add like terms. That means adding -8x to the positive 5x, and only that since thats the only possible way.

-3x + 24 < 9x + 108

When that's over, you have to move the variable(in my case, 9x) to the left-hand side and change its sign:

-3x -9x + 24 < 108

You see that instead of positive 9x, like it was, it's now negative 9x since we changed its location.

And now do the same to the constant (in my case, 24) to the right-hand side. make sure to reverse its sign aswell, so now it's a negative 24. Now it looks a bit like this:

-3x -9x < 108 -24

Collect like terms (subtracting -9x by -3x, subtracting 108 by -24)

-12x < 84

Now that we isolated the variable, we have to divide it by -12.

KEEP IN MIND!!

When doing work like this, at some point you have to divide the variable by itself, and same thing to the other side. When the variable is a positive number and you're dividing by a positive number, DONT REVERSE THE GREATER/LESS (whatever you have) SIGN!!

When you are dividing by a negative number,

REVERSE THE SIGN!!

I always forgot this and got it wrong back then!!

Back to the lesson, itll look like this when dividing

-12x < 84

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

-12x -12x

Once you divide it, you'll get this

x > -7

I hope this helped!

Which is the length of x? 1 7/9 2 1/2 1 1/4 1 3/5

Answers

Answer:

option D.  x = 1 3/5

Step-by-step explanation:

ratio and proportion

4 = x

5     2

X multiply:

5x = 4(2)

5x = 8

x = 8 / 5

x = 1 3/5

Answer:

x = 1 3/5

Step-by-step explanation:

x = 1 3/5

How many calories will Darrel burn in 1 minute while kayaking enter the answer below in the box 50/200, 100/400, 150/600, 200/800

Answers

Answer: 100/400

Step-by-step explanation:


The total rainfall for two days was 14.6 mm. The first day's total was 4.5 mm less than the second
day's. How much rain fell on each day in cm?​

Answers

Answer:

first day = 5.05mm = 0.505cm

second day = 9.55mm = 0.955cm

Step-by-step explanation:

Let x represent first day

Let y represent second day

x + y = 14.6

x = y - 4.5

(y - 4.5) + y = 14.6

2y - 4.5 = 14.6

2y = 14.6 + 4.5

2y = 19.1

Divide both sides by coefficient of y which is 2

y = 9.55

Substituting value of y in the equation x + y = 14.6

x + 9.55 = 14.6

x = 14.6 - 9.55

x = 5.05

To convert the values in mm to cm you divide them by 10 since 1cm=10mm

Which of the following could be the side lengths of a triangle?

A. 2, 3, 6

B. 9, 10, 19

C. 5, 8, 15

D. 12, 15, 25

Answers

Answer:

The answer would be D. 12, 15, and 25.

Step-by-step explanation:

The first two sides, sum must be larger than the third side.

so 12+15=27 which is larger than 25

The correct answer for  the side lengths of a triangle is D. 12, 15, 25.

What is the side lengths of a triangle rule?

The sides of a triangle rule asserts that the sum of the lengths of any two sides of a traingle has to be greater than the length of the third side.

If a,b,c are the sides of the triangle then,

a + b > c

Now in the given question let us suppose a,b,c be the length of the sides

A. 2, 3, 6

Here, a = 2, b= 3 and c = 6

Applying sides of a triangle rule,

a + b > c

⇒2 + 3=  5 which is less than 6

Here, a + b <c

Therefore , these are not the lengths of triangle.

B. 9, 10, 19

Here, a = 9, b= 10 and c = 19

Applying sides of a triangle rule,

a + b > c

⇒9 + 9=  18 which is less than 19

Here, a + b <c

Therefore , these are not the lengths of triangle.

C. 5, 8, 15

Here, a = 5, b= 8 and c = 15

Applying sides of a triangle rule,

a + b > c

⇒5 + 8 =  12 which is less than 15

Here, a + b <c

Therefore , these are not the lengths of triangle.

D. 12, 15, 25

Here, a = 12, b= 15 and c = 25

Applying sides of a triangle rule,

a + b > c

⇒12 + 15 = 27 which is greater than 25

Here, a + b > c

Therefore , these are the lengths of triangle.

Hence,The correct answer for  the side lengths of a triangle is D. 12, 15, 25.

More about length of the side of triangle rule :

https://brainly.com/question/10100449

#SPJ5

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