Ethans solution and reasoning for solving an equation are shown below:
Given: 4/2x - 10 = 30
Which reason is incorrect?
(9th grade math Algebra 1)
Answers
Answer:
Reason 4 is wrong in Ethan's solution.
Step-by-step explanation:
Reason 4 is incorrect because at this step in the answer we already have one variable which is unknown on the left side and then one constant which can be seen on the right. So, instead of multiplying the fractions the way Ethan is doing, all you need to do now is just simplify the expression instead of complicating the step.
Related Questions
Amy owes her mother $76. She pays her mother $14 on Sunday and $24 on Monday. Use an expression to describe the situation.
Answers
Answer:
$38
Step-by-step explanation:
$14+24=38 Amy pays her mom 38 dollars. :)
ok how do you add pictures
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Does anyone know what math topic this is?
Answers
Answer:
If you're talking about things like Algebra and Geometry, its Geometry
If you're not, can you be more specific ? :D
Answer:
Geometry (trigonometry)
Step-by-step explanation:
Trigonometry is the branch of mathematics concerned with specific functions of angles and their application to calculations. There are six functions of an angle commonly used in trigonometry which I believe is the problem you are on.
Hope this helps <3
17. A rectangle has perimeter
40 in. If the width is 7 in, find the
area.
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Area= 91
Step-by-step explanation:
if the width is 7 then the length is 13
13 times 7 is 91
|x|-5 what does the vertical bar means?
Answers
Answer:
it means absolute valuen so anything inside becomes a positve.
Step-by-step explanation:
If two triangles are congruent corresponding angle measures are the same/different and corresponding side
lengths are the same/different.
Answers
Answer:
Corresponding angles for similar triangles are equal
Corresponding angles and sides are equal for congruent triangles (they may be superimposed)
Ju Chan solved the previous question by finding the expression 4(-15).
Which problem would give the same result? Select two options.
Answers
Answer:
-15(4) or -4(15) or 15(-4)
Step-by-step explanation:
As long as you stick with the same variables, you can change their position in the equation or change both of their signs. This should give you the same answer.
Let's say your equation was -2(6). This means you must multiply -2 and 6. This should give you -12. You could also phrase it as 2(-6) or -6(2) or 6(-2). They all give you -12 as a result.
Answer:
(-1)(15+15+15+15)
(-15)+ (-15)+ (-15)+ (-15)
Step-by-step explanation:
help asap please, forgot how to do math :)
Answers
Answer:
x = 8
Step-by-step explanation:
A common pythagorean triplet is 7, 8, 9
Answer:
11.4
Step-by-step explanation:
Pythagorean theorem
[tex]7^{2}[/tex] + [tex]9^{2}[/tex] = [tex]x^{2}[/tex]
49 + 81 = [tex]x^{2}[/tex]
130 = [tex]x^{2}[/tex]
11.4 = x
Marking brainliest
Don’t know what to write for the last 2
Answers
Answer:
Business, management, marketing and technology.
Engineering, manufacturing and industrial technology.
i am not sure but i hope it will help you.
please mark me as brainlest.
Evaluate k + 3 when: *
4 points
51 13 15 43 9 45 37
k = 12
k = 48
k = 10
k = 40
k = 12
k = 48
k = 10
k = 40
Answers
Step-by-step explanation:
12 + 3=15
48+ 3=51
10 + 3=13
40 + 3=43
12 + 3=15
48 + 3=51
10 + 3=13
40+ 3=43
What is the slope of the line for BOTH graphs? Are the slopes the same or different?
PLS HELP MEEE
Answers
Answer:
both are -10
Step-by-step explanation:
#1
x1 y1 x2 y2
1.5 180 6 135
(Y2-Y1) (135)-(180)= -45 ΔY -45
(X2-X1) (6)-(1.5)= 4.5 ΔX 4.5
slope= -10
B= 195
Y =-10X +195
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#2
x1 y1 x2 y2
1 175 8 105
(Y2-Y1) (105)-(175)= -70 ΔY -70
(X2-X1) (8)-(1)= 7 ΔX 7
slope= -10
B= 185
Y =-10X +185
|2x+9|>10=5 Please help ASAP
Answers
Simplifying
2x + 9 + -10 = -5
Reorder the terms:
9 + -10 + 2x = -5
Combine like terms: 9 + -10 = -1
-1 + 2x = -5
Solving
-1 + 2x = -5
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '1' to each side of the equation.
-1 + 1 + 2x = -5 + 1
Combine like terms: -1 + 1 = 0
0 + 2x = -5 + 1
2x = -5 + 1
Combine like terms: -5 + 1 = -4
2x = -4
Divide each side by '2'.
x = -2
Simplifying
x = -2
I hope it helps you
please help asap show work and dont put links
Answers
Answer:
add two tiles per figure until u get to eight.
Step-by-step explanation:
SOMEONE HELP PLEASE IT'S DUE IN A FEW MINUTES
if f(x)=3x and g(x)=x+2 find (f-g) (x)
Answers
= (3x) - (x+2)
= 3x - x - 2
= 2x - 2
i need help on 39 please help me!
Answers
Answer:
,hjdjhihdihhubxhjx,❤️❤️❤️♥️♥️Evaluate 3yz +20 -xy if x =2, y = -3, and z = 4
Answers
Answer:
Ans. is -10. Explanation is in the attachment.
You are trying to make a hole in one on the miniature golf green
3
3
5
7
9 X
a. Write an absolute value function that represents the path of the golf ball.
3
$ (z) = – 31x/+6
b. Write the function in part (a) as a piecewise function.
f(x) =
if x < 6
if x26
Answers
b. f(x) = 2x/3 if x < 6
f(x) = 8 - 2x/3 if 6 <= x <= 9
To the person trying to hlp me here :D
Answers
Answer:
47. n = -3
48. n = -15
49. n = -13/3
50. n = -17/3
Step-by-step explanation:
47.
6n + 4n = -30, so 10n = -30. Dividing by 10 on both sides, we get that n = -3.
48.
6n - 4n = -30, so 2n = -30. Dividing by 2 on both sides, we get that n = -15.
49.
6n - 4 = -30, so 6n = -26. Dividing by 6 on both sides, we get that n = -13/3.
50.
6n + 4 = -30, so 6n = -34. Dividing by 6 on both sides, we get that n = -17/3.
find 6x+y when x=5 and y=7
Answers
Answer:
37
Step-by-step explanation:
6x+y
Let x = 5 and y = 7
6*5+ 7
Multiply
30 +7
Add
37
Need awnsers please
Answers
Answer:
<C+83=90 [ sum of complementary angles ]
<C=90-83
<C=7
Now,
<C+83=180 [ sum of supplementary angles ]
<C=180-83
<C=97
can any one solve this please....I kinda need this
Answers
9514 1404 393
Answer:
t₂ = 2t₃ = 2Step-by-step explanation:
The given expression says ...
[tex]t_n+1=3\\\\t_n=2\qquad\text{for any value of n}\\\\t_2=2\\\\t_3=2[/tex]
Answer:
[tex]here \: tn + 1 = 3 \\ tn = 2 \\ put \: n = 1 \\ t1 = 2 \\ n = 2 \\ t2 = 2 \\ n = 3 \\ t3 = 2 \\ for \: all \: n \: values \: = 2 \\ thank \: you[/tex]
ATTENDING TO PRECISION The diagram shows an insect called a walking stick Use the ruler to estimate the length of the abdomen and the length of the thorax to the nearest inch. How much longer is the walking stick's abdomen than its thorax? How many times longer is its abdomen than its thorax?
Answers
Estimation and precision are used when the actual value cannot be easily determined or calculated.
The length of the abdomen is [tex]2\frac 14[/tex] inchesThe length of the thorax is [tex]1\frac 34[/tex] inchesThe abdomen is longer than the thorax [tex]1\frac 27[/tex] timesGiven that, the length is to be measured to the nearest [tex]\frac 14\ inch[/tex], we have the following observations
The length of the abdomen starts at the 0 mark and ends after the 2-mark. The length ends before [tex]2\frac{1}{2}[/tex]. So, the length of the abdomen can be estimated to [tex]2\frac{1}{4}[/tex] --- to the nearest [tex]\frac{1}{4}[/tex].Similarly, the length of the thorax starts at the [tex]2\frac{1}{4}[/tex] mark and ends before [tex]4\frac{1}{4}[/tex]. The end of the thorax length can be estimated to: [tex]4[/tex] --- to the nearest [tex]\frac{1}{4}[/tex].So, we have:
[tex]L_1 = 2\frac 14[/tex] --- the length of the abdomen
[tex]L_2 = 4 - 2\frac 14[/tex]
Express as improper fraction
[tex]L_2 = 4 - \frac{9}{4}[/tex]
Take LCM
[tex]L_2 = \frac{16 - 9}{4}[/tex]
[tex]L_2 = \frac{7}{4}[/tex]
Express as proper fraction
[tex]L_2 = 1\frac{3}{4}[/tex] --- the length of the thorax
The number of times (n) the abdomen is longer than the thorax is calculated as follows:
[tex]n = L_1 \div L_2[/tex]
So, we have:
[tex]n = 2\frac 14 \div 1\frac 34[/tex]
Express as improper fractions
[tex]n = \frac 94 \div \frac 74[/tex]
Rewrite as:
[tex]n = \frac 94 \times \frac 47[/tex]
[tex]n = \frac 97[/tex]
Express as proper fractions
[tex]n = 1\frac 27[/tex]
Hence, the abdomen is [tex]1\frac 27[/tex] times longer than the thorax
Read more about estimation and precision at:
https://brainly.com/question/509148
each day for several days, the charge in the price of a share of socks was -3$. The total charge in price during those days was -36$. Over how many days did the price decline
Answers
Answer: 12 days
Step-by-step explanation:
if the price is declining by -3$ then you just divide -36$by the -3$ and you get the amount of days it declined
Select the correct answer.
Which statement correctly describes the strongest classification for quadrilateral ABCD with vertices A(-3, 1), B(1, 3), C(2, 1), and D(-2, -1)?
A.
Quadrilateral ABCD is a rectangle because adjacent sides have slopes that are negative reciprocals.
B.
Quadrilateral ABCD is a parallelogram because adjacent sides have slopes that are negative reciprocals.
C.
Quadrilateral ABCD is a rectangle because adjacent sides have slopes that are not negative reciprocals.
D.
Quadrilateral ABCD is a parallelogram because adjacent sides have slopes that are not negative reciprocals.
Answers
Answer:
I think C is the correct answer
Answer:
C
Step-by-step explanation:
Jaulas father throws Kayla a graduation party that costs $773. He pays the DJ $250, $75 for the cake, and $4 per party guest for food. How many guests were at the party?
Answers
Answer:
112 guests
Step-by-step explanation:
I. If her total cost is 773$
When Total = DJ + Cake + Guest
773 = 250 + 75 + 4(x)
773 = 325 + 4(x)
773 - 325 = 4(x)
448 = 4x
x = 448/4
x = 112
That makes guests are 112
7k -2(3k + 1) - 9
Y’all I need help.
Answers
Answer:
k - 11
Step-by-step explanation:
7k - 2(3k +1) - 9
So first we start by multiplying out the brackets. Multiply 2 by 3k and 1 then it becomes:
7k - 6k + 2 - 9
Then collect like terms subtract 6k from 7k and 9 from 2:
k - 11
HOPE THIS HELPED
Marcus is tying two bows for birthday gifts. He uses 3 3/8 feet of ribbon for Crystal's gift and 2 3/4 feet for Tim's gift. If he has an 8-foot roll of ribbon, how much will Marcus have left over?
Answers
Marcus will have [tex]1\frac{7}{8}[/tex] feet as left-over.
It is important we understand that foot refers to single unit of measurement while feet is the plural of foot.
Marcus needs to tie two bows for birthday gifts and he has an 8-foot roll of ribbon.
• He uses 3 3/8 (27/8 as a fraction) feet of ribbon for Crystal's gift.
• He uses 2 3/4 (11/4 as a fraction) feet for Tim's gift.
The left-over computation is as follows:
= [tex]8 - \frac{27}{8} - \frac{11}4}[/tex]
= [tex]\frac{256-108-88}{32}[/tex]
= [tex]\frac{60}{32}[/tex]
= [tex]\frac{15}{8}[/tex] or [tex]1\frac{7}{8}[/tex] feet
Marcus will have [tex]1\frac{7}{8}[/tex] feet as left-over.
See related question here brainly.com/question/14702678
solve for w 3w + 6w - 19 = -91
please
Answers
Hi ;-)
[tex]3w+6w-19=-91\\\\3w+6w=-91+19\\\\9w=-72 \ \ /:9\\\\\huge\boxed{x=-8}[/tex]
Answer:
w = -8Step-by-step explanation:
Given:
3w + 6w - 19 = -91Isolate w, add 19 to both sides:
3w + 6w = -91 + 19Simplify both sides:
9w = -72Divide both sides by 9:
w = -72/9w = -8Enter an inequality that represents the graph in the box.
Answers
Answer:
It will be -8≤×≤8
If a is a negative number and ab is a positive number, then:
(A) b is positive
(B) b is negative
(C) a is greater than b
(D) b is greater than a
(E) b may be zero
