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3 years ago

Error analysis- MULTIPLY AND DIVIDE DECIMALS

Mathematics

2 answers:

Angelina_Jolie [31]3 years ago

6 0

Answer:

The correct answer is 4.48 feet long.

Step-by-step explanation:

The error is that you accidentally added instead of multiplying 3.2 and 1.4.

Maslowich3 years ago

4 0

4.48 feet, you added instead of multiplying

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chubhunter [2.5K]

Answer:

Step-by-step explanation:

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3 years ago

If pq = 23 and uv = 1/23, find the value of u×q×v×p. Explain which properties you used

zhannawk [14.2K]

Remember that multiplication is commutative, which means the order in which we multiply things doesn't matter.

The order of u × q × v × p (which we can abbreviate uqvp) isn't as important as the fact that we're multiplying all four values together. We could just as easily rewrite the expression as pquv, and it'd represent the same value.

To find this value then, we can simply multiply pq and uv - the values we already know - together.

If we start with the expression pq = 23, we can multiply either side by uv (taking advantage of the multiplication property of equality) to get

pquv = 23uv

And since we know that uv = 1/23, we can use the substitution property of equality to replace the uv on the right side with 1/23:

pquv = 23(1/23)

The inverse property of multiplication states that any number multiplied by its inverse (its reciprocal) gives us 1. 23 and 1/23 are reciprocals of each other, so 23(1/23) = 1, which means

pquv = 1

Finally, going back to the second paragraph, we can use the commutative property of multiplication to rearrange the left side of the equation, giving us the solution

uqvp = 1

3 0

3 years ago

Use the figure to find the length HJ. Assume △DEF ≅ △GHJ. *I GOT 30*

solniwko [45]

Yes, HJ = 30 ft.

It tells us that triangle DEF = triangle GHJ.

By seeing this we know without looking at the triangles that EF is going to be the same as HJ because when they say a figure is the same as another and list the letters such as 'DEF' and 'GHJ' they will list them in the same order.

So

'DEF' = 'GHJ' we get:

'DE' = 'GH'

'EF' = 'HJ'

And we can do the last and first letters:

'FD' = 'JG'

And since we know 'EF' = 'HJ' and that they already told us 'EF' was 30, we know HJ will be 30.

5 0

3 years ago

Help question below please and thank you i will give brainliest

vodomira [7]

Answer: angle V = 41 degrees (choice B)

======================================================

Explanation:

We're told that RS = ST = RT. This means triangle RST has all three sides equal to one another. This triangle is equilateral. Each interior angle is 60 degrees. This is because each angle is y, and y+y+y = 180.

Since each angle of triangle RST is 60 degrees, this means angle STR is 60 degrees.

Let z be the measure of angle UTV. Note how

(angleSTR)+(angleUTV) = 180

60+z = 180

z = 180-60

z = 120

Making angle UTV to be 120 degrees

------------------------------------

Now we can focus on triangle UTV since we have expressions for each interior angle

U = 4x-9
T = 120
V = 5x+6

Add up those angles, set the sum equal to 180, solve for x

U+T+V = 180

(4x-9)+(120)+(5x+6) = 180

9x+117 = 180

9x = 180-117

9x = 63

x = 63/9

x = 7

Use that x value to find the missing angle measures

angle U = 4x-9 = 4*7-9 = 28-9 = 19 degrees

angle V = 5x+6 = 5*7+6 = 35+6 = 41 degrees

Note how

U+T+V = 19+120+41 = 180

which helps confirm our answer.

6 0

3 years ago

Read 2 more answers

Natalie has a choice of three breads five choices of meat and four choices of cheese to make a sandwich how many different sandw

Ivahew [28]

You would have 15 types of sandwiches that she can make

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4 years ago