Mathematics College

1) Twice a number decreased by four is 32.
What is the number?
Equation:
Ans. 6
I
Step by step please because I don’t understand it

Answers

Answer 1

Answer:

x = 18

Step-by-step explanation:

Twice a number becomes 2x, decreased by 4 becomes -4, and combined those terms equal 32.

2x - 4 = 32

2x - 4 + 4 = 32 + 4  (isolate the variable)

2x = 36

x = 18

Related Questions

Solve the following system of equations. x + y + 8z = 16
2x + 7z = 19
4x - 4y + 4z = 4

a. x = 1,y = 2,z = 2
b. x= 2,y = 2,z = 1
c. x = 6,y = 2,z = 1
d. x = 13,y = 11,z = -1​

Answers

By substitution, we will see that the solution of the system is:

x = 13, y = 11, z = -1

The correct option is D.

How to solve the system of equations?

Here we have a system of 3 equations:

x + y + 8z = 16

2x + 7z = 19

4x - 4y + 4z = 4

I will solve it by substitution, first, let's simplify the equations. Here we can divide the third equation by 4 so we remove all the common factors, then the system becomes:

x + y + 8z = 16

2x + 7z = 19

x - y + z = 1

Now, I will isolate x on the second equation:

x = (19 - 7z)/2 = (19/2) - (7/2)*z = 9.5 - 3.5*z

Now we can replace that on the other two equations:

(9.5 - 3.5*z) + y + 8z = 16

(9.5 - 3.5*z) - y + z = 1

Rewriting the system we get:

y + 4.5z = 6.5

-y - 2.5z = -8.5

Now we can isolate y on the first equation:

y = 6.5 - 4.5z

Replacing that on the other equation we get:

-(  6.5 - 4.5z) - 2.5z = -8.5

-6.5 + 4.5z - 2.5z = -8.5

2z = -8.5 + 6.5 = -2

z = -2/2 = -1

Then the value of y is:

y = 6.5 - 4.5z = 6.5 - 4.5*(-1) = 11

And the value of x is:

x = 9.5 - 3.5*z = 9.5 - 3.5*(-1) = 13

So the solution of the system is:

x = 13, y = 11, z = -1

The correct option is D.

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A deposit of $225 as an integer

Answers

Answer:

225

Step-by-step explanation:

A deposit is positive, so a deposit of $225 as an integer (number) would be 225

I hope this helps!

Find the volume of this right rectangular prism. [Type your answer as a number.]

Answers

Answer:

200m

Step-by-step explanation:

To find volume you multiply each side, length, width, and height. 5 times 4 is 20, and 20 times 10 is 200

WILL MARK BRAINLIEST!!

Answers

Answer:

only p(x)

Step-by-step explanation:

The others have a restricter domain

Bart read 3,432 pages of books last year! That's 1,544 fewer pages than he read the year before. How many pages did Bart read in the two years combined?​

Answers

Answer:

5,320 pages

Step-by-step explanation:

Last year: 3,432 pages

Last year: 3,432-1,544= 1,888

3,432+1,888= 5,320

Select two ratios that are equivalent to 2:9

Choose 2 correct answers

Answers

Answer:

4:18 and 6:27

Step-by-step explanation:

Please answer ASAP I have 15 min help

Answers

she did not follow PUMAS...

this means she added before multiplying or dividing

Answer:

32

Step-by-step explanation:

she was supposed to divide and multiply first and then add those answers

6+6+20=32

Mark and a friend went out for dinner the bill was $23.40 they leave a 20% tip how much of a tip will they leave ? ​

Answers

Answer:

answer is 4.68$

Step-by-step explanation:

23.40×20/100=4.68

4.68$ is 20% of 23.40$

4.68$

True or False: The Commutative Property of Addition states that for all expressions a and b , ab = ba.

Answers

According to the Commutative Property of Addition, ab = ba for all expressions a and b: FALSE

What is the Commutative Property of Addition?According to the commutative property of addition, altering the order of addends has no impact on the sum. Here's an illustration: 4 + 2 = 2 + 4 4 + 2 = 2 + 4 4+2=2+4. The addition and multiplication arithmetic operations are covered by the commutative property. This implies that the outcome of adding or multiplying two numbers remains unchanged if the order or position of the numbers is changed. For instance, 4 + 5 equals 9, and 5 + 4 equals 9.

According to the Commutative Property of Addition, rearranging the addends has no impact on the sum.

a+b=b+a

Therefore, the statement "according to the Commutative Property of Addition, ab = ba for all expressions a and b" is FALSE

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x
y
-3
6
-1
4.
0
3
1
3
3
4
3
6

Answers

it’s not good to solve

What is the distance between the points (2, 1) and (14, 6) on a coordinate
plane?

Answers

9514 1404 393

Answer:

  13 units

Step-by-step explanation:

The distance is found using the distance formula:

  d = √((x2 -x1)² +(y2 -y1)²)

  d = √((14 -2)² +(6 -1)²) = √(144 +25) = 13

The distance between the two points is 13 units.

What type of relationship does this equation represent?

y = 9x -7
Proportional
Nonproportional

Answers

Answer:

Nonproportional

Step-by-step explanation:

hope it helps.

Answer:

non proportional is your answer

Is (yx1)+2 equal to y+2

Answers

(yx1) + 2
y + 2
yes you’re right !
correct! (yx1)+2 = y+2

Jace and his children went into a bakery and he bought $9 worth of cookies and brownies. Each cookie costs $0.75 and each brownie costs $3. He bought twice as many cookies as brownies. Graphically solve a system of equations in order to determine the number of cookies, x,x, and the number of brownies, y,y, that Jace bought.

Answers

Answer:

(9, 18) (3, 6) Plz correct me if wrong

Step-by-step explanation:

Jace bought 4 cookies and 2 brownies from the bakery.

Let x represent the number of cookies and y represent the number of brownies.

Since he bought $9 worth of cookies and brownies. Each cookie costs $0.75 and each brownie costs $3. hence:

0.75x + 3y = 9      (1)

Also, he bought twice as many cookies as brownies, hence:

x = 2y

x - 2y = 0     (2)

Solving equation 1 and 2 simultaneously gives x = 4, y = 2

Hence Jace bought 4 cookies and 2 brownies from the bakery.

Find out more at: https://brainly.com/question/16763389

1/2^-2 2^-3 -4^5
What is the value of
for x = 2 and y=-4?

Answers

value of x=2 is-8 and y=-4 is -1024

Please help!
Write an equation of the line in slope-intercept form.

Answers

Answer:

y=4/2m-3 OR y=2m-3

Step-by-step explanation:

y=Mx+b

Slope = m = rise / run = 15/3 = 5

b is found by plugging a point in the equation (I tried both points)

Y=Mx + b
7=(5)(2) + b
b=-3

So your equation is

y=5x-3

The deer population is estimated to be 17,600 in northern Illinois, but an actual count was 21,300. What is the percent error? 1 point 82.6% 21% 20% 17.4% Last week, you finished Hurry

Answers

Answer:67

Step-by-step explanation: 82.6% is over 49

Solve the equation.
8 (2-6v) +19=-61

Answers

Answer:

v = 2

Explanation:

8(2 − 6v) + 19 = −61

[ Simplify both sides of the equation ]

8(2 − 6v) + 19 = −61

(8)(2) + (8)(−6v) + 19 = −61 (Distribute)

16 + −48v + 19 = −61

(−48v) + (16 + 19) = −61 (Combine Like Terms)

−48v + 35 = −61

−48v + 35 = −61

[ Subtract 35 from both sides ]

−48v + 35 − 35 = −61 − 35

−48v = −96

[ Divide both sides by -48 ]

−48v / -48 = −96 / -48

v = 2

- PNW

Find X HELP ME please!!

Answers

Answer:

The answer is A) 3 Hope this helped

A transformation is given by the rule (x,y) → (x +3, y - 8). Which of the following describes the effect of this transformation on an object
A a translation by 8 units left and 3 units up
B a rotation by 90 counterclockwise about the origin
C a translation by 3 units right and 8 units down
D a reflection across the line 2 = 3

Answers

Answer:

3

Step-by-step explanation:

Answer:

C a translation by 3 units right and 8 units down

Step-by-step explanation: This answers the Unit 3 summative assessment N-gen Math

I need to know the answer lol

Answers

the orange one , 5/12

hope this helps! please mark brainliest :)

Answer:

5/12

Step-by-step explanation:

given the function f(x)= 3^ - 2 what is the value of f (3)

Answers

I am assuming you meant to write f(x) = 3^x -2

f(3) = 3^3 - 2 <=>

f(3) = 27 - 2 <=>

f(3) = 25

what is the percent increase from 70 to 84

Answers

Answer:

20%

Step-by-step explanation:

find the answer in simplest form 3/7x2/3

Answers

Answer:

7 6/7 or 7.8571429

Step-by-step explanation:

The simplest form of the given expression (3/7) x (2/3) is 2/7.

The expression is given as:

(3/7) x (2/3)

The numerator will be 3 x 2 = 6, and the denominator will be 7 x 3 = 21.

So, the simplified form of (3/7) x (2/3) is 6/21.

However, we can further simplify this fraction by dividing both the numerator and denominator by their greatest common divisor (GCD), which is 3.

Dividing 6 and 21 by 3 gives us 2 and 7 respectively.

Therefore, the simplest form of (3/7) x (2/3) is 2/7.

Learn more about the fraction here:

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A flagpole casts a shadow that is 24 ft long at the same time you cast a shadow that is
4.5 ft long. If you are 6 ft tall, how tall is the flagpole?

Answers

Answer:

32 ft tall

Step-by-step explanation:

24 divided by 4.5 is 5.3 repeating. 6 times 5.3 is around 32

If you have 2 pieces of spaghetti that have lengths 4 cm and 10 cm, what could be the possible length of a third piece of spaghetti to complete the triangle? cm < x < cm

Answers

Answer:

  6  <   third side    <   14

Third side must be greater than 6 and less than 14

Step-by-step explanation:

A triangle can be formed from 2 sides of any length.

The third side must be longer than the difference of the other 2 sides and

the third side must be less than the sum of the other 2 sides.

(if this question is from k12 lesson check)

what is 8x+6 simplified?

Answers

Answer:

4x+3

Step-by-step explanation:

8 and 6 are multiple of 2 so divide 8 /2 = 4 and divide 6/2=3

Jana ran the first 312 miles of a 5-mile race in 13 hours. What was her average rate, in miles per hour, for this first part of the race? Explain how you solved the problem.

Answers

Answer:

speed = distance / time

Jana's speed is

  speed = (3.5 mi)/(1/3 h) = 3*3.5 mi/h = 10.5 mi/h

Select all the equations below that have a slope of -5.

A
y=2x−5

B
y=−5x+2

C
y=10−5x

D
y=10x−5

Answers

B. y=-5x+2 has a slope of -5.

Write the linear
equation in slope
intercept form:
6x+3y=0

Answers

Answer:

y=-6x/3

Step-by-step explanation:

6x+3y=0

3y=-6x

y=(-6/3)x

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