Unit 4, Lesson 4 Cool-down 4.4 Mis-Steps

Lin solved the equation 8( x - 3 ) + 7 = 2x( 4 - 17 ) incorrectly.
Find the errors in her solution. What should her answer have been?

Lin's solution:

8( x - 3 ) + 7 = 2x( 4 - 17 )

8( x - 3 ) + 7 = 2x(13 )

8x - 24 + 7 = 26x

8x - 17 = 26x

-17 = 34x

-½ = x

Answer:

cos A = 12/13 = 0.9231

(angle A = 22.62°)

Step-by-step explanation:

cos A = 12/13 = 0.9231

ANSWER=

cos A = 12/13 = 0.9231

(angle A = 22.62°)

EXPLANTION=

cos A = 12/13 = 0.9231

Answer:

48

Step-by-step explanation:

180=x+90+42 (sum of angles of triangle)

180=x+132

180-132=x

48=x

Answer:

12 quarters

Step-by-step explanation:

number of quarters ---------x

number of dimes ------------y

therefore, x + y = 37---------------times 10 both sides --------10x + 10y = 370-------equation 1

              0.25x + 0.1y = 5.5 -----times 100 both sides -------25x + 10y = 550 ------equation 2

equation 2 minus equation 1 is 25x + 10y - 10x - 10y = 550 - 370 ------ 15x = 180 -------x = 12

there are 12 quarters

Answer:

The annual interest rate is 6%

Step-by-step explanation:

Use the formula for simple interest:  i = prt.

Set i = prt equal to $30:  $30 = prt

Solve this for r:

         $30

r = -------------- = ($30) / ($500)  = 0.06

      $250(2)

The annual interest rate is 6%

Answer:

n=7

Step-by-step explanation:

6(n-3) - 2n=10

Distribute

6n - 18 -2n = 10

Combine like terms

4n -18 = 10

Add 18 to each side

4n-18+18 = 10+18

4n = 28

Divide by 4

4n/4 = 28/4

n = 7

Answer:

80%

Step-by-step explanation:

Step 1: Add the given data

588 + 147 = 735

Step 2: Divide the number of students who bought a school shirt by the total number of students

588 ÷ 735

= [tex]\frac{735}{588}[/tex]

= 0.8

Step 3: Convert the decimal to fraction

0.8 = 80% (Move the zero 1 place behind the number and remove the ".")

Or

0.8 × 100 = 80%

Therefore, 80% of students bought a school shirt.

Answer:

all are functions except  the graph because if u use a ruler it touches the lines more than once at one time

Step-by-step explanation:

mrk me brainliest plz

Answer:

For "I have a Dream", it is focused on America as a whole and to one day have people of all races to be treated equally. Letter from a Birmingham Jail was focused more on a group of white clergy.

Answer:

The answer is -5/24.

Step-by-step explanation:

Answer:

A = -5/24

Step-by-step explanation:

1/2 (1/4 - 2/3)

1/2 (3/12 - 8/12)

1/2 (-5/12)

= -5/24

Answer:

for number 5 Subtract 18 from both sides of the equation

4+18−18=30−18

for number 1 Subtract 7 from both sides of the equation

so number 3 subtract 3 from each side and so on hope it helps

im not sure how to explain it but--

for example.. the first one

1) y + 7 = 12

first, you subtract 7 from both sides

so-- you'll subtract 7-7 on the left and 12-7 from the right

now, you have y by itself since 7-7 = 0

y = 12-7, or y = 5

also its important to note that when the equation is like 2) and uses subtraction (x-4) instead of addition (y +7)-- then you add to both sides

so for 2)-- you'd add 4 to both sides for 4 to cancel out to equal 0

your goal is always to isolate the variable on one side

Answer:

Midpoint is[tex](-25.15,10.2)[/tex]

Step-by-step explanation:

A line segment refers to line that has two endpoints.

Let [tex](a,b),(c,d)[/tex] be the endpoints of a line segment.

Midpoint of the line segment is given by [tex](\frac{a+c}{2} ,\frac{b+d}{2})[/tex]

Take the given points as follows:

[tex](a,b)=(-24.6,38.1)\\(c,d)=(-25.7,-17.7)[/tex]

Midpoint of a line segment [tex]=(\frac{-24.6-25.7}{2},\frac{28.1-17.7}{2})[/tex]

[tex]=(\frac{-50.3}{2} ,\frac{20.4}{2} )\\=(-25.15,10.2)[/tex]

Answer:

2 and 3 i guess hope this helps

Answer:

for seven no questions and is 12 and for 8 no question is 5

Answer:

Hi, there your answer will be C. y=33/2x+425

Step-by-step explanation:

I tired uploading the picture on how I got my answer, but it keep saying inaapriate words which I didn't even said anything bad, but yeah trust me the answer is right.

Answer:

C. The data are skewed to the left, so the median height is greater than the mean height.

Step-by-step explanation:

The answer is C because the mean is typically less than the median when the data is skewed left.

Answer:

y = -2/5 x + 4

Answer:

See explanation for answer.

Step-by-step explanation:

Slop intercept formula:  y = mx + b

Slope of this graph: 4

I hope this helps!

Have a lovely day!

Answer:

i saw someone else ask  this question i'm trying to remember the answer

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

[tex]\frac{1}{9^{2} }[/tex]=1/81

[tex]9^{\frac{1}{2} }[/tex] =3

[tex]\frac{1^{2} }{9}[/tex]=[tex]\frac{1}{9}[/tex]

[tex]9^{-2}[/tex]=1/81

Answer:

2/12

Step-by-step explanation:

Answer:

28√3

Step-by-step explanation:

√12 + √12 + 4√27 + 4√27 = 28√3

Answer:

/ 3=/ 5 { alternate anglea}

/ 5+/6 =180° {straight angle}

/ 6=180-26

/ 6=154°

hope it helps

Answer: 3, 4, 6

Step-by-step explanation: equilateral triangle, square, regular hexagon

In a regular tessellation 3,4,6 sides can be tessellating regular

polygon.

A normal tessellation is one made the use of only one regular polygon. A semi-normal tessellation uses or extra ordinary polygons. Triangles and squares, for example, shape ordinary tessellations and octagons and squares for a semi-normal tessellation.

First of all, there are handiest 3 normal tessellations which can be triangles, squares, and hexagons. To make a ordinary tessellation, the inner angle of the polygon has to be a diviser. that is due to the fact the angles need to be introduced as much as so it does now not leave any gaps.

A polygon having identical facets of identical lengths are known as everyday polygons. A ordinary polygon is a polygon that is equiangular i.e. all the angles are equal in measure and equilateral i.e. all facets have the equal length.

A line of symmetry is a line that can be attracted to divide a parent into same halves. A determine has line symmetry or reflection symmetry while it could be divided into identical halves that match. A discern has mirrored image symmetry if it could be meditated throughout a line and look exactly the same as it did earlier than the reflection.

Learn more about regular polygon here:-https://brainly.com/question/1592456

#SPJ2

Answer:

45g² + 30g

Step-by-step explanation:

5g(8g+6)

Distribute 45g² + 30g

Answer:

[tex]\huge{\boxed{\boxed{\tt { Answer :-}}}} \ [/tex]

[tex]5g(8g + 6) \\ =( 5g \times 8g) + (5g \times 6) \\ = 40g {}^{2} + 30g[/tex]

➟ Answer :- 40g² + 30g

Answer:

257+259+261+263 = 1040

Step-by-step explanation:

Answer:

B)

Step-by-step explanation:

we are given a logarithmic expression

we want to expand it

in order to do so we can consider using

recall that,

[tex] \displaystyle \sqrt{x} = {x}^{ \frac{1}{2} } [/tex]

thus rewrite

[tex] \displaystyle \log_{ \sigma} \bigg( \frac{57}{74} \bigg) ^{ \large\frac{1}{2} } [/tex]

use division logarithm property

[tex] \displaystyle \log_{ \sigma}(57) ^{ \large\frac{1}{2} } - \log_{ \sigma}(74)^{ \large \frac{1}{2} } [/tex]

use exponent logarithm property:

[tex] \displaystyle \frac{1}{2} \log_{ \sigma}(57) ^{ \large } - \frac{1}{2} \log_{ \sigma}(74)^{ \large } [/tex]

and we are done!

[tex]\Large{\underline{\mathcal{ Given: }}}[/tex]

ᴇǫᴜᴀᴛɪᴏɴ: 12x - 30 = 6

[tex]\Large{\underline{\mathcal{ To Find : }}}[/tex]

value of x .

[tex]\Large{\underline{\mathcal{ Solution: }}}[/tex]

➦ 12x - 30 = 6

➦ 12x = 30 +6

➦ 12x = 36

➦ x = 36 /12

[tex]\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\underline{\boxed{\sf{ x = \frak{\blue{ 3 }}}}}[/tex]

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1. Which value of x will make the equation 12x - 30 = 6 true?

Answer:

D.

Step-by-step explanation:

Answer:

50π or 157.07963267949 plus whatever it is in (inches, feet)

Step-by-step explanation:

Answer:

The answer is "2.4 units "

Step-by-step explanation:

Please find the complete question:

[tex]EC = x\\\\\frac{5}{3} = \frac{4}{x}\\\\5x = 4(3)\\\\5x = 12\\\\x = \frac{12}{5}\\\\x = 2.4[/tex]

Answer:

B. 2.4

Step-by-step explanation:

5/3 = 4/EC

EC = 4 (3/5) = 12/5 = 2.4

Answer:

-1

Step-by-step explanation:

The change in y between x=-1 and x=2 is -3 and -3/3=-1 so the slope is -1

Answer:

-1

Step-by-step explanation:

Use any 2 points on the line.

Let's use (10, -6) and (2, 2).

slope = (difference in y)/(difference in x)

slope = (-6 - 2)/(10 - 2)

slope = -8/8

slope = -1