Mathematics Middle School

112=7x+7(-4x-17)
So i need help with this and a worksheet that relates to these types of problems i got a 10% on it please helpppp

Answers

Answer 1
112= 7x + 7(-4x-17)
multiply the 7 by everything in parentheses
112=7x+(7*-4x)+(7*-17)
Positive multiplied by a negative is negative
112=7x-28x-119
combine like terms
112= -21x-119
add 119 to both sides
231= -21x
divide both sides by -21
-11= x

Check:
Substitute answer in equation
112= 7x + 7(-4x-17)
112= 7(-11)+7[(-4)(-11)-17]
112= -77 + 7(44-17)
112= -77 + 7(27)
112= -77 + 189
112=112

Hope this helps! :) Good luck with math!!

Related Questions

a box of crackers has a volume of 48 cubic inches. what is the volume of a similar box that is smaller by a scale factor of 2/3

Answers

For this case what you need to know is that the original volume of the cookie box is:
 V = (w) * (l) * (h)
 Where,
 w: width
 l: long
 h: height.
 We have then:
 V = (w) * (l) * (h) = 48 in ^ 3
 The volume of a similar box is:
 V = (w * (2/3)) * (l * (2/3)) * (h * (2/3))
 We rewrite:
 V = ((w) * (l) * (h)) * ((2/3) * (2/3) * (2/3))
 V = (w) * (l) * (h) * ((2/3) ^ 3)
 V = 48 * ((2/3) ^ 3)
 V = 14.22222222 in ^ 3
 Answer:
 the volume of a similar box that is smaller by a scale factor of 2/3 is:
 V = 14.22222222 in ^ 3

What’s the ordered pairs of
y = 10x + 18? The image is down below.

Answers

Okay 2
Really
4
During
32
Square
67
First, if ordered pairs are in the form of (x,y) then the first one means plug in x with 0. If you do that, you get y= -10(0)+18. Simplify to get y=18. So, for the first one, it is (0,18). For the next one, you plug in 1 for x. So, y=-10(1)+18. Simplify to get y=-10+18. Simplify again to get y=8. So the second one is (1,8). For the last one you have only the y value, so plug in 78 for y. So, 78=-10x+18. We want to isolate x, so subtract 18 from both sides. You get 60=-10x. Now divide by -10 to get -6=x. So, the last ordered pair is (-6,78)

Rewrite 0.434343... as a fraction

Answers

Final answer:

The repeating decimal 0.434343... can be rewritten as a fraction by defining the decimal as a variable, manipulating the equation, and finally isolating the variable to find that the fraction form of 0.434343... is 43/99.

Explanation:

To rewrite the repeating decimal 0.434343... as a fraction, we first define the repeating decimal as a variable, let's call it x = 0.434343.... Then, to isolate the repeating section, we multiply x by 100, given the two-digit repeat, which gives us 100x = 43.434343.... By subtracting the original equation from this new one, we get: 99x = 43, because 100x - x = 43.434343... - 0.434343... simplifies to 99x = 43. Dividing both sides by 99 gives us x = 43/99, which is the fraction form of the repeating decimal.

To rewrite the repeating decimal 0.434343... as a fraction, we first denote it as x. Next, we can subtract the non-repeating part from the repeating part to get a new number, y. Then, we can express x and y as fractions and solve for the repeating fraction part.

Melissa’s father is 194 cm tall. He is 79 cm taller than Melissa. How tall is Melissa?

Answers

Melissa is 115cm talk
I think Melissa is 115cm, because i think u have to subtract 194 to 79 than u get ur answer

If three dozen cookies cost $9, what is the cost per cookie?

Answers

36/9
=$4 per cookie......
3 dozen = 36
9/36 (9 divided by 36) = .25

$0.25 per cookie

Fred makes 2.50 less per hour than Barney. Barney makes 15.75 per hour. How much does Fred make per hour?

1) $14.75

2) $15.00

3) $13.25

4) $12.75

Answers

The answer is C) $13.25
The answer is C 15.75-2.50

plz help me with this problem!!!! Thanks!

Answers

It’s 10 that’s the answer
The height of the overlapping area is 8 ft and the length is 10 ft, therefore we need to subtract 10×8= 80 ft of overlapping surface area

Of the following sets, which numbers in {0, 1, 2, 3, 4} make the inequality 7x + 3 < 17 true?

{0}

{0, 1}

{0, 1, 2}

{2, 3, 4}

Answers



the set that makes the inequality true is{0, 1,}

Hello,

The correct answer is B) {0, 1}

Hope this helps!!!! Happy Holidays!!!! (:

I need the right answer please

Answers

The right answer is not among those offered. The domain is
.. {-9, -6, 4, 7}

___
The 4th selection {4, 7} is the best of those offered, but it is not correct.

simplify 2y+(4+5y) expression

Answers

2y+(4+5y)
2y+4+5y
7y+4

Answer: 11y

Step-by-step explanation:

2y+(4+5y)  

2y+4+5y

7y+4

= 11y

Need help with number 13 please, thanks.

Answers

The answer is I) 103. So the temperature started at 101, then went up to 103. Going up is not negative. F and G are out of the picture, because they are negative. It is not H because the temp. is 103, not 101. It changed. I is your answer.
~Deceptiøn
I is the right answer.

in the decimals chart, the memory cue for dividing by a whole number is "up." what does that mean?

Answers

Rounding up is a rule that is used, no matter what the value is. We round numbers up to get a better estimate for our answers. The memory cue for dividing by a whole number "up" just means that you will be bringing the decimal up.

Answer:

It means that you have to put the decimal point in the quotient exactly above the decimal point in the dividend.

Step-by-step explanation:

In the picture attached, the decimals chart is shown. There you can see where you have to put the decimal point in the quotient when you are dividing a decimal number by a whole number.

On the coordinate plane below, quadrilaterals TRAP and HELP are similar to eachother.
Use the Pythagorean theorem to determine the ratio between sides RA and EL.
A. 2:1
B.5:3
C. 3:2
D. 1:1

Answers

Since HP:PT is 1:2, then the ratio will be applied to all sides. From the picture you can conclude RA is made from 2 horizontal space and 4 vertical space, so EL would be made from 1 horizontal space and 2 vertical space.
Using Pythagorean theorem, the length of RA and LE would be:


RA^2= 4^2 + 2^2 = 16 +4
RA^2= 20
RA= √20

EL^2= 2^2 +1^2 = 4+1
EL^2= 5
EL= √5

RA:EL= √20/√5
RA:EL= (√4*√5)/√5
RA:EL=√4= 2

The ratio would be A. 2:1

Answer:

The ratio would be A. 2:1

Step-by-step explanation:

Hey guys! Could someone help me with this problem? I got the wrong answer! The answer is B, but I don’t know how to get it! Could you work it out and explain?! Thank you so much! God Bless!

Answers

When it says 'which has a greater rate of change' it is referring to 'what has a greater slope.' So, let's calculate each thing's slope:

Table:
I'm going to pick the easiest values to work with, so I'll pick the points (0, -2) and (1, -9/5) - I simplified the mixed fraction. So, here we go, the slope formula is:
[tex] m =\frac{y_2-y_1}{x_2-x_1} [/tex]
[tex]m = \frac{- \frac{9}{5} - (-2)}{1-0} = \frac{- \frac{9}{5} - ( -\frac{10}{5} )}{1-0}[/tex]
[tex] m = \frac{ \frac{1}{5} }{1} = \frac{1}{5} [/tex]

So, the table's slope is -1/5.

Graph
We can, again, pick two points. I'll pick the two given: (5, 0) and (0, -3).  Let's start off with the same formula:
[tex] m =\frac{y_2-y_1}{x_2-x_1} [/tex]
[tex]m = \frac{-3-0}{0-5} = \frac{3}{5} [/tex]

The graph's slope is 3/5.

Now, we just have to decide which is bigger: -1/5 or 3/5. So, clearly:
3/5 > -1/5. 

The 3/5 slope was the graph, hence it has the greater rate of change (that's why it's B). If anything doesn't make sense, feel free to DM me or ask!

Solve the linear system of equations using addition. Graph the equations to verify your solution. -4x=y+3

Answers

In standard form the answer would be y=-4x-3

Answer:

Step-by-step explanation:

given equation,

-4 x = y + 3

y = -4 x -3........................(1)

comparing equation 1 with

 y = m x + c

m = -4 and  c = -3

now using this we can easily plot the graph where c is the y-intercept and m is the slope of line .

so, the plot is shown in the graph attached below.

A hollow crystal ball is made of glass that is 3 centimeters thick. The ball has a radius to the outside surface of 8 centimeters. What is the approximate volume of glass used to make the ball? Use 3.14 for pi.

Answers

Answer:

The approximate volume of glass is equal to [tex]1,620.24\ cm^{3}[/tex]

Step-by-step explanation:

we know that

The volume of the sphere ( crystal ball) is equal to

[tex]V=\frac{4}{3}\pi r^{3}[/tex]

the approximate volume of glass is equal to

[tex]V=\frac{4}{3}\pi (rb^{3}-ra^{3})[/tex]

[tex]rb=8\ cm[/tex]

[tex]ra=(8-3)=5\ cm[/tex]

substitute

[tex]V=\frac{4}{3}(3.14)(8^{3}-5^{3})=1,620.24\ cm^{3}[/tex]

What is the approximate volume of the cone?

Use 3.14 for π .


A. 1206 cm³

B. 2170 cm³

C. 3260 cm³

D. 6510 cm³

Answers

The formula is A 1,206. 
 
The approximate volume of the cone is 1206(A)

PLEASE HELP!!!
If g(x) = 2x4 + 3x3 - x2, find g(-1).
A) -42
B) -12
C) -10
D) -2

Answers

Answer:

The value of g(-1) is -2

Step-by-step explanation:

[tex]g(x) = 2x^4 + 3x^3 - x^2[/tex]

Now we find g(-1)

To find g(-1) plug in -1 for x  in the given g(x) equation

Replace all x by -1

[tex]g(x) = 2x^4 + 3x^3 - x^2[/tex]

[tex]g(x) = 2(-1)^4 + 3(-1)^3 - (-1)^2[/tex]

[tex]g(x) = 2-3-1=-2[/tex]

The value of g(-1) is -2

Answer:

-2

Step-by-step explanation:

g(-1) = 2(-1)4 + 3(-1)3 - (-1)2 = 2(1) + 3(-1) - 1 = 2 - 3 - 1 = -2

Dakota tiled a floor with tiles that look like this:




Here is her floor:



What is the length of? _________________


What is the length of ? ________________


What is the length of? _______________


What is the measure of ABC? ____________


What is the measure of CAB? ____________


What is the measure of ACB? _____________


What is the measure of BCE? _____________


What is the measure of CED? ______________


What is the total length of Dakota’s floor? _____________


What is the total width of Dakota’s floor? ____________

Answers

AB=8 in.
AC=6 in. 
BC=10 in.
<ABC=37 
<CAB=90
<ACB=53
<BCE=2*37=74
<CED=2*53=106
l=6*AB=6*8=48 in.
w=6*AC=6*6=36 in.


Add the two expressions.

−6.3x+4 and 1.5x−6

Enter your answer, in simplified form, in the box.

please help fast 30 points!

Answers

(-6.3x + 4) + (1.5x - 6)

-6.3x + 1.5x = -4.8x
4 + (-6) = -2

-4.8x - 2 is your answer


the correct answer is -4.8x - 2

Help me with surface area plssss

Answers

Answer:  The surface area of the given cylinder is:  " 747. 32  in² " .

______________________________________________________
Explanation:
______________________________________________________
The formula for the "Surface Area, "S. A." , of a cylinder : 

" S.A. = 2 [tex] \pi [/tex] r² + 2[tex] * \pi [/tex] * r * h " ;

in which:   [tex] \pi [/tex] = 3.14 (we shall use this approximation) ; 

                           S.A. = surface area (in "square units" ;
                                                            in our case, "square inches" ; 
                                                                 or; " in² " ) ;
                                r = radius = 7 in. 

                                h = height = 10 in. 
__________________________________________________
   Let us plug in our "known" — and/or "given" — values ; into the formula & solve for the "S.A." (surface area of this "cylinder") :
__________________________________________________

 →  S.A. = 2 [tex] \pi [/tex] r² + 2 * [tex] \pi [/tex] * r * h ; 


→  S.A.  =  2 (3.14) * (7 in.)²   +    2 * (3.14) * (7 in) * (10 in)  ; 

→  S.A.  = [ 2 * (3.14) * (7²)  * (in²) ] +  ( 2 * 3.14 * 70 *  in²) ;

              = ( 2 * 3.14 * 49 * in² ) + (439 .6 * in²) ; 

              = (307. 72 in²) + (439 .6 in²) ; 

              =  747. 32  in² ; 
______________________________________________________________
 →  Note:  This answer is already rounded to the nearest hundredth.  Apparently, the "image attached" mentioned to round the answer "to the nearest hundredth"; however, this part of the "image attached" appears to have been "cut off" .
______________________________________________________

→ This answer is already rounded to the nearest hundredth.
______________________________________________________
Answer:  The surface area of the given cylinder is:  " 747. 32  in² " .
______________________________________________________

Fifteen students were surveyed to see whether they liked the color red or blue. There were three more students who preferred blue over red. Write and solve a system of equations to find how many students preferred blue and how many preferred red.

Answers

r=students who like color red
b=students who like color blue

r+b=15
b=r+3

then, replace the b in the first equation with the b in the second:
r+(r+3)=15
2r=12
r=6

6 students like red

r+b=15
6+b=15

b=9

6 students like red 
9 students like blue

between which two consecutive whole numbers is
[tex] \sqrt{46} [/tex]

Answers

You have to find which perfect square numbers are closest to 46. The list is 1, 4, 9, 16, 25, 36, 49, 64... we can stop there. 

46 falls between 36 and 49, which is 6 and 7 squared. So the answer is 6 and 7.

jordan has a marble collection. 4/12 of the marbles are red. 2/4 are green. what fraction of her total marbles are red and green

Answers

2/4(3/3) = 6/12

6/12 + 4/12 = 10/12

10/12 or 5/6 is your answer

Hope this helps

sombody please help me fast

Answers

A because you subtract 15from 20 and it =5 or 1/4
The answer is 5, hope it helps.

What is the value of the x in this figure?

Answers

I believe its 45 because a right angle equals 90 degrees and if you multiply 45 and 2, it'll give you a right angle(90 degrees)
x=45°
180÷2=90
90÷2
=45

negative financial information (excluding bankruptcy) can stay on your credit report for:

Answers

It depends on the type of negative financial information that is on your credit report. For example, an account that has undergone the collections or delinquency process can stay on your credit report for up to 7 years. Car loans may stay on your credit report for up to 10 years. However, it really depends on the type of account, and the account company. Some accounts will report positive payments after collections within 30 days. Others may take longer. 

a gardener can plant 17 seeds in 25 minutes at that rate how long will it take him to plants 51 seeds

Answers

51 / 17 = 3
3 * 25 = 75

Answer: It will take the gardener 75 minutes to plant 51 seeds.

Hope this helps!

If the gardener plants 51 seeds, then the time taken will be 75 minutes.

What are ratio and proportion?

A ratio is a collection of ordered integers a and b represented as a/b, with b never equaling zero. A proportionate expression is one in which two items are equal.

A gardener can plant 17 seeds in 25 minutes at that rate.

We know that the ratio of time and number of seed plantations will remain the same.

Let T be the time and S be the number of seed plantations.

T / S = 25 / 17

If the gardener plants 51 seeds, then the time taken will be

T / 51 = 25 / 17

T = 1275 / 17

T = 75 minutes

If the gardener plants 51 seeds, then the time taken will be 75 minutes.

More about the ratio and the proportion link is given below.

https://brainly.com/question/14335762

#SPJ2

Let E be the point of intersection of the diagonals of a parallelogram. The lengths of the line segments from E to two of the parallelogram’s vertices are 3 meters and 4 meters. What are the lengths of the segments from E to the other two vertices of the parallelogram? Justify your answer.

Answers

The length is going to be 3m and 4m.
The diagonals of a parallelogram has the following property:

They bisect each other. Which means each diagonal divides the other diagonal in two equal halves.

So, the point of intersection of two diagonals is the midpoint of both diagonals. If the distance from that point of intersection E, to the vertices of parallelogram is 3 meters and 4 meters, the distance from E to opposite vertices will also be the same i.e. 3 meters and 4 meters respectively, because the diagonals bisect each other.

I'll give brainliest if you show your work.
Mia’s work to find the slope of a trend line through the points (3, 10) and (35, 91) is shown below.
Mia's Work
Step 1: 3-35/ 10-91
Step 2: -32/ -81
Step 3: 32/ 81
What was the first error that Mia made?
Mia simplified incorrectly and made the slope positive.
Mia subtracted in the wrong order.
Mia switched the numerator and the denominator.
Mia used subtraction instead of addition.

Answers

Its A because as you know:Step One: Identify two points on the line.Step Two: Select one to be (x1, y1) and the other to be (x2, y2).Step Three: Use the slope equation to calculate slope.PLEASE MARK BRAINLIEST

Answer:

Mia switched the numerator and the denominator.

Step-by-step explanation:

The slope formula is given by:

[tex]m=\frac{y2-y1}{x2-x1}[/tex]

Where we have two ordered pairs:

P1 = (x1, y1)

P2 = (x2, y2)

Given is : Mia’s work to find the slope of a trend line through the points (3, 10) and (35, 91)

Step 1: [tex]\frac{3-35}{10-91}[/tex]

If we compare the formula with Mia's step, we can see that she switched the numerator and the denominator.

Hence, the error made is : Mia switched the numerator and the denominator.

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