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2 years ago

To find 36+29+14,Joshua rewrote the expression as 36+14+29 .what property did Joshua use to rewrite

Mathematics

2 answers:

muminat2 years ago

8 0

Commutative property.

Marizza181 [45]2 years ago

4 0

Commutative property - a property that allows you to switch numbers around in a equation and still get the same answer
Therefore, Joshua is using the commutative property.

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Shelby mixes a 25% bleach solution with 5 cups of a 10% bleach solution, resulting in a 20% bleach solution. The table shows the

Tcecarenko [31]

Answer:

The value of x is 10

Step-by-step explanation:

We can use a system of equations to solve this.

Cups of 25% bleach solution used = x

Cups of 1-% bleach solution used = 5

Cups of solution we get = y

The first equation becomes:

x + 5 = y

Using the decimal forms of each percentage solution

25% solution for x cups = 0.25x

10% solution for 5 cups = 0.1(5)

20% solution for y cups = 0.2 y

The second equation becomes:

0.25x + 0.1(5) = 0.2y

So the system of equations is:

x + 5 = y

0.25x + 0.1(5) = 0.2y

Solve both equations simultaneously to find the values of x and y:

x = 10 cups

y = 15 cups

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2 years ago

Read 2 more answers

FOR 14 POINTS Thalia, a quiz show contestant, answered 20 questions. She was awarded 2 points for every correct answer that she

Svetradugi [14.3K]

Answer:

The viewer mistakenly determined that one of the equations in the system should be 2 x + y = 28. Instead modifications should have been made before applying the equation.

Step-by-step explanation:

Given

Total Questions = 20

Total Points = 28

Correct Answers = +2 points

Incorrect Answers = -1 point

Required

Spot the error in the viewer's calculation

The viewer represents the correct answers with x and the incorrect ones with y.

This implies that

$x + y = 20$

Also, for every correct answers, she gets 2 points;

This can be represented by 2x

and for every incorrect answers, she gets -1 point

This can be represented by -y

This implies that

$2x - y = 28$

This is where the viewer made a mistake

The viewer's mistake is that; instead of subtracting total incorrect points from the correct points, the viewer added them together;

Solving further

$2x - y = 28$

$x + y = 20$

Add both equations together

$2x + x + y - y = 28 + 20$

$3x = 48$

Divide both sides by 3

$\frac{3x}{3} = \frac{48}{3}$

$x = \frac{48}{3}$

$x = 16$

Substitute $x = 16$ in $x + y = 20$

$16 + y = 20$

Subtract 16 from both sides

$16 - 16 + y = 20 - 16$

$y = 20 - 16$

$y = 4$

This implies that the contestant answered 16 questions correctly and 4 questions incorrectly

7 0

1 year ago

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While her husband spent 2½ hours picking out new speakers, a statistician decided to determine whether the percent of men who en

sveticcg [70]

Answer:

Men can be concluded to enjoy shopping electronic activity more than women, but in weekend days. The case might not hold true for week working days also.

Step-by-step explanation:

To study : whether the percent of men who enjoy shopping for electronic equipment is higher than the percent of women who enjoy that.

Out of 67 men, 24 said they enjoyed the activity

So, % of men enjoying the activity = (24 / 67) x 100

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So, % of women enjoying the activity = (8 / 24) x 100

= 33.33%

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2 years ago

Which quadratic equation is equivalent to (x2 – 1)2 – 11(x2 – 1) + 24 = 0? u2 – 11u + 24 = 0 where u = (x2 – 1) (u2)2 – 11(u2) +

Vinvika [58]

u2 – 11u + 24 = 0 where u = (x2 – 1) the first awnser, a.

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2 years ago

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Is ABC~DEF? If /so, identify the similarity postulate or the theorem that applies, A. similar- AA B. similar-SSS C. similar- SAS

Mariana [72]

Answer: Similar - AA

Just took the quiz, Its Similar AA not sure why just trust me homie

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2 years ago