Mathematics Middle School

Which of these expressions is equivalent to -2(x - 5)?
a.
- 2x - 5
b.
-2x +5
C.
-2x + 10
d.
-2x - 10

Answers

Answer 1
The answer is C

-2× x＝ -2x
-2×-5＝10
Answer 2
The answer is 100% c

Related Questions

Given the graph below write the equation of the line.
y = 2 + 2
y = -2x
y = 2x + 8
y = 0x + 8

Answers

Answer:

y = 2x+8

Step-by-Step Explanation:

The equation should be in the form of y=mx+b

So you already know it's not A. Also you already know it's not D because the line goes at an angle, if "m"(slope) was 0 then the line would be straight horizontal or straight vertical. So that leaves B and C. And finally you know it's not B because the line is going in the positive direction not negative, so the slope has to be positive, also "b" in the equation is the y-intercept, and that's where the line intersects with the y-axis, and you can see that the line intersects at 8 on the graph. Therefore, the answer is C, y=2x+8

Hope this helps!! :)

y=2+2, y=-2x, y=2x+8, and y=0x+8
2x+8

Which ordered pair is a solution to the system of linear equations Negative 4 x + y = 8 and x minus 5 y = 17?
(–4, –3)
(–4, 3)
(–3, –4)
(–3, 4)

Answers

I took a photo of my work and if you don’t understand how I got something just tell me

Answer - (-3, -4)

The solution to the linear equations will be ( -3, -4 ).

What is linear equation?

The equation whose highest degree of the variable used in the equation is 1 is called linear equation.

For example 12x+5y=19 is a linear equation.

We have,

- 4x + y = 8     .....(i)

x - 5y = 17     .....(ii)

Now,

Rewrite equation (ii) ,

x - 5y = 17  

⇒ x = 5y + 17     .....(iii)

Now substitue  this value of x in equation (i) i.e. - 4x + y = 8

We get,

- 4(5y + 17) + y = 8

- 20y - 68 + y = 8

- 19y - 68 = 8

- 19y = 8 + 68

-19y = 76

⇒ y = - 4

So, we have a value of y now substitute this equation (iii),

We get,

x = 5(-4) + 17

x = - 20 + 17

x = - 3

So,

The solution to the given linear equations is ( -3, -4 ).

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BRAINILIST TO FIRST PERSON TO ANSWER AND GET IT CORRECT!!! please answer fast!

Answers

The answer would be 4 divided by 2/3 = 6 tiles
4 divided by 2/3=6 I think

Talia is going to put carpet in her new house. She measures one side of her living room and finds it measures 17 meters.Which measurement does 17 meters represent?

Area,Length, or perimeter.

Answers

Answer:

length

Step-by-step explanation:

A cellular service plan for Company A has unlimited minutes for $40/month and a text message rate of $0.10/message. A cellular service plan for Company B has unlimited minutes for $30/month and a text message rate of $0.10/message. At what number of text messages will the total monthly cost for each of the two companies be equal?

Answers

Answer:

None.

Step-by-step explanation:

None because if however many text messages you do, Plan A will be 10 more dollars than Plan B

1)The average height of 4 boys is 1.65m. One boy is 1.68m tall. Find the average height of the other 3 boys.
2) Ian, John and Juan shared a sum of money in the ratio 4:7:9. What percentage of the sum of money did John receive?
3) The usual price of a refrigerator is $800. It is sold at a discount of 15%.find the selling price.

Answers

1)
If the average height of the 4 boys is 1.65m that means the total of their heights is 6.6m

To get the average height of the other 3 boys you have to take away the one boys height from the total and divide that number by 3

6.6-1.68 = 4.92
4.92/3 = 1.64

Therefore the average height of the other three boys is 1.64m

2)
To do this you first find the total of the parts of the ratio so
4+7+9 = 20

Next you find what percentage each part is worth so
100/20 = 5
This means that each part of the ratio is worth 5% of the total sum

Because John received the 7 in the 4:7:9 ratio you times 7 by 5
7x5 = 35

Therefore John got 35% of the total sum of the money

3)
The formula for finding the discounted price using the percentage discount is
Discounted Sale price = (100% - %Discount) x Regular Sale Price

Using this formula to find the discounted sale price you do

(100% - 15%) x 800
= 85% x 800
= 680
Therefore the selling price of the refrigerator is $680

This question has three parts. Answer the parts in order.
Part 1

Sam is 8 years younger than his brother Steve. He is also half as old as Steve.

Select two equations of a system that can be solved to find both ages.

Answers

Answer:

Step-by-step explanation:

B and A

Let his sam’s age = y
And his brothers age = x
If y = x*(1/2)
And y = x - 8
x - 8 = x/2
Cross multiply
2(x - 8) = x
2x - 16 = x
Collect like terms
2x - x = 16
x = 16
Hence, if y = x/2
y = 16/2
y = 8
Check:
y = x/2
8=16/2
8 = 16

Determine the difference
34
.
7
−
(
−
8
.
6
)
.

A.
–43.3

B.
43.3

C.
26.1

D.
–26.1

Answers

Answer:

B: 43.3

Step-by-step explanation:

do not answer unless ur victora pleaseeee

Answers

Answer:

? can i be victoria?

Step-by-step explanation:

A state income tax is 9% of any amount earned over $15,000. What state income tax does a person earning $24,500 pay?
A. $1,350 B. $855 C. $2,205 D. $650

Answers

Answer:

the answer is C. $2,205

What are like terms? How do you combine them? Whats an example
I NEED HELP ASAP PLEASE

Answers

Answer:

like terms are terms that have the same variable

Step-by-step explanation:

when combining like terms we add their coefficients for example 4x + 5x = (4+5)x=9x

Examples of like terms are:
5d & 7d
3x & 2x
10 & 4
7 & -6

You combine them by simply doing what the equation tells you:
For example:
4d + 6 - 2d + 10
This would simplify to:
2d + 16

This is because I took the like terms, 4d & -2d, and 6 + 10.

4d - 2d = 2d
6 + 10 = 16

So the answer would be:
2d + 16

BRAINLIST WILL be given . look at the pictures . the first picture is the question and the other two are just context .

Answers

Answer:

d//

Step-by-step explanation:

took the test

hope this helps

Answer:

B. y = 1/2x - 2

Step-by-step explanation:

The slope-intercept form is:

y = mx + b

According to the table, point (0, -2) we see:

y-intercept is - 2

And using two points (4, 0) and (8, 2) we can find the slope:

m = (2 - 0)/(8 - 4) = 2/4 = 1/2

So the line is:

y = 1/2x - 2

Correct option is: B

Carlos opened an internet café in November. The table shows his profit or loss during his first four months in business. Use the table on the below to determine what was the overall profit or loss for the first four months the Internet café was open?

a. -$1,135.52 b. +$2,270.52 c. -$1,270.52 d. +$4,541.56

Answers

Answer:

not sure

Step-by-step explanation:

do you have a photo of the table that came with the question if so I might be able to help

Answer: is d

Step-by-step explanation:

Write the solution as an ordered pair, "No Solution" or "Infinitely Many."

9x + 2y = 27
y = -8x + 31

Answers

2y = -9x + 27
y = -4.5x + 13.5
-4.5x + 13.5 = -8x + 31
13.5 = -3.5x + 31
-17.5 = -3.5x
X = 5
There is one solution

Can someone please help me

Answers

When you add a negative, it’s basically subtracting.
25. -3 - 4 - 1 = -8
26. 12 - 5 + 3 = 10
27. 10 - 7 + 6 = 9

Find a ratio equivalent to 40/50.
Choose the correct answer below.

A. 20/25
B. 41/51
C. 20/10
D. 8/25
E. 50/40
F 39/49

Answers

Answer:

A

Step-by-step explanation:

You can divide 40 by 2.....this gives you 20.

Whatever you do to the top, do to the bottom.

Divide 50 by 2.....this gives you 25.

Your answer is 20/25

Answer:

A

Step-by-step explanation:

You can actually use simple division to help you solve this problem. The ratio given is 40/50. Well, divide the two numbers of the ratio. You will then get, 4/5 (.8 as a decimal). You can then do the same to all of the answer choices and see which one gets you the same decimal or fraction.

Hope this helped! (marking me brainliest would be great!)

Using a calculator to divide 200 by 12, you obtain a result of 16.6666667.
An answer to which question can be approximated using this result?
A.
How much does each person pay when 12 people share a meal costing $200?

B.
Pencils are sold in packs of 200. Twelve students need pencils. How many packs of pencils are needed?

C.
A bottle of shampoo costs $12.00 and contains 200 grams of shampoo. What is the cost per gram of shampoo?

D.
What is the average distance walked per day by a hiker who walks 12 miles in 200 days?

Answers

Answer:

the answer is A because it accurately represents the situation

Step-by-step explanation:

it cant be B because its asking how many packs are needed and you would only need 1 pack

it cant be C because you are dividing 12 by 200

it cant be D because you are also dividing 12 by 200

Each person cost $16.6666667 when 12 people share a meal costing $200 is the correct representation of the situation thus option (A) will be correct.

What is the arithmetic operator?

Arithmetic operators are four basic mathematical operations in which summation, subtraction, division, and multiplication involve.,

Division = eg 2/3

Multiplication = eg 2 × 4

As per the given,

200/12 = 16.6666667

In option (A) →

Meal cost = $200

Number of people = 12

Per person pay = 200/12=$16.6666667

Hence "Each person cost $16.6666667 when 12 people share a meal costing $200 is the correct representation of the situation".

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im in middle school can you help me!... Your parents took your family out to dinner.Your parents wanted to give the waiter a 15% tip.If the total amount of the dinner was $42.00.What should be paid to the waiter as a tip?

Answers

the waiter should be paid about $6.30

Did I do this right?

Answers

Answer = Yes got it correct

Answer:

Looks good :)

Step-by-step explanation:

please help i think its c but im not sure

Answers

yea i agree too with C
C. is the correct answer

{(12,6), (8,4) , (14,7), (-6, -3)} Identify the constant and equation of the ordered pair

Answers

Answer:

(8,4)

Step-by-step explanation:

(03.07A LC) The coordinate grid shows the graph of four equations: A coordinate grid is shown from negative 12 to positive 12 on the x axis and also on the y axis. Line A passes through the ordered pairs negative 3, 4 and 9, negative 2. Line B passes through the ordered pairs 2, 8 and 8, negative 8. Line C passes through the ordered pairs negative 3, negative 4 and 4, 6. Line D passes through the points 2, negative 2 and 5 and 6. Which set of equations has (3, 1) as its solution?
A and B
C and D
B and D
A and D

Answers

Answer:

A & D

Step-by-step explanation:

Answer:

D) A and D

Step-by-step explanation:

Hope I helped

Have a great day

14% of 120

Explain in detail, please!

Answers

you do 120 x .14 which gives you 16.8%. this is because you convert 14% to 0.14 so 1.00 is 100 percent. ex 28% is .28 and. 5% is .05 (remeber to put in hundredths place) and then just multiple that percent diver by the original number.
16.8
i’m to tired to explain what just went on in my head haha

Write the following as a decimal, use repeating decimals if necessary.

A. 0.5
B. 0.54
C. 0.64
D. 0.53

Answers

Answer:

How am I supposed to answer?

6/11

is the same as

6÷11

Then using

Long Division for 6 divided by 11

gives us

=0.54

B.)0.54

(Decimal) : 0.54

Step-by-step explanation:

Hope I helped

Brainliest plz

ILL GIVE BRAINLIEST

I wrote random stuff please please explain to me what linear relationships/functions are.

Answers

Answer:

Linear relationshi/functions are lines that goe up linearly

Step-by-step explanation:

I hope this helps?!

linear functions are functions that go in a straight line..
its a function if it has a constant rate of change
the picture the first two is +10 but the next one is +15 so it doesn’t have a constant rate of change
so therefore there’s no constant rate of change
btw rate of change is the same as triangleY/ triangle X
but since there’s no constant rate of change it’ll be blank

help i suck at math


A b c or d on all of them

Answers

1-D, 2-C, 3-A, 4-C, 5-B, 6-A, 7-D, 8-B
You should use phone math it helps me

Examine the following diagram:


3 lines intersect a line to form 8 angles. Angle 5 is adjacent to angle 4.


Which angle is adjacent to ∠4?

A: ∠2

B: ∠3

C: ∠5

D: ∠8

Answers

Answer:

c

Step-by-step explanation:

The required angle that is adjacent to ∠4 beside  ∠5 is given as ∠3. Option B is correct.

What is the triangle?

The triangle is a geometric shape that includes 3 sides and the sum of the interior angle should not be greater than 180°

here,
When the figure will be constructed, we will see that there will be 3 adjacent angles to ∠4, as ∠1, ∠3, and ∠5 which share the common line and are present in the adjacent positions.

Thus, the required angle that is adjacent to ∠4 beside  ∠5 is given as ∠3. Option B is correct.

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The measures of two pairs of corresponding angles of two triangles are 24 degrees and 55 degrees. Explain why the two triangles are similar.

Answers

Answer:

Are the two triangles below similar?

Triangles ABC and DEF are shown. Angle A measure 30 degrees, angle C measure 65 degrees, side AC measures 14, side AB measures

Yes, because there are two pairs of congruent corresponding angles

No, because there are not two pairs of congruent corresponding angles

Yes, because the corresponding sides are proportional

No, because the corresponding sides are not proportional

WACNFSHCAJ OKAY I NEED SERIOUS HELP

Write a procedure that explains how to use a number line to add integers and counters to subtract integers. Include diagrams and examples.

Answers

We can use the number line as a model to help us visualize adding and subtracting of signed integers. Just think of addition and subtraction as directions on the number line. There are also several rules and properties that define how to perform these basic operations.

To add integers having the same sign, keep the same sign and add the absolute value of each number.

To add integers with different signs, keep the sign of the number with the largest absolute value and subtract the smallest absolute value from the largest.

Subtract an integer by adding its opposite.

Examples:

4+(-8)=?   Add a negative interger by moving to the left. Start at 4 and move 8                                units to the left. 4+(-8)=-4

-4-(-3)=?   To subtract an integer, add its opposite. Add the opposite of -3 , or 3.   -4-(-3)= -4+3=-1

Hope this helps!  

Follow the steps to solve the equation using the algebra tiles. −4x + (−3) = –x + 3. 1. Add 4 positive x-tiles to both sides and create zero pairs. 2. Add 3 negative unit tiles to both sides and create zero pairs. 3. Divide the unit tiles evenly among the x-tiles. x =

Answers

X= negative 2

First take negative 4 and add it to both sides to get -3=3x+3
Then subtract 3 from both sides to get -6=3x
next divide -6 by 3x to get x= -2

Answer:

-2

Step-by-step explanation:

:)))

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