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devlian [24]
4 years ago
11

Select the correct answer from the drop-down menu. Fill in the missing number in the equation.

Mathematics
1 answer:
noname [10]4 years ago
7 0

Answer:

8

Step-by-step explanation:

a A + b A where A is a matrix and a and b are scalars

( a+b) A

3+5 \left[\begin{array}{cc}-1&2\\4&-5\end{array}\right] = 8\left[\begin{array}{cc}-1&2\\4&-5\end{array}\right]

         

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In converting 20 inches to centimeters, what unit (omit the number) would
Liono4ka [1.6K]

Answer:

you would put inches in the denominator of the second term and centimeters in the denominator in the first term.

Step-by-step explanation:

the equation would be 20in / 1cm x 2.54 / 1 in.

5 0
3 years ago
Read 2 more answers
Find the root of the equation below x^2-6x+12=0
Alla [95]

Answer:

Step-by-step explanation:

another word for root are x int.

x^2-6x+12

ac method will not work because there are no real number solutions

you will need to complete the square or use the quadratic formula.

(x-3-sqrt(3i))   (x-3+sqrt(3i))

6 0
3 years ago
Find the height of the cylinder if the radius is 3 and the volume is 340
mr Goodwill [35]

Answer:

12.025

Step-by-step explanation:

h=v/(π*r square)

divide the volume of a cylinder by the amount of the radius squared multiplied by π(pi)

340÷(π×3square)

giving you 12.025

(original in calculator=12.02504014)

but it is 12.025

4 0
2 years ago
Given: 15+6(y−2)=21 Prove: y = 3 Drag and drop the reasons into the boxes to correctly complete the proof. Statement Reason 15+6
olchik [2.2K]

Answer:

Given:  15+6(y-2)=21

Distributive Property tells us that we multiply each term inside the parentheses with the term outside of the parentheses.

a\cdot(b-c) =a\cdot b -a\cdot c

Using distributive property on expression 6(y-2) to solve the further expression as:

15+6\cdot y - 6\cdot 2=21

Simplify:

15+6y-12 =21

Subtract the number 12 from 15 we get 3;

therefore, the expression become:

6y+3=21

Subtraction property of equality tells us that subtract the same number from both sides of an equation.

Now, subtract 3 from both the sides we get;

6y+3-3=21-3

Simplify:

6y=18

Now, divide by 6 on both the sides we get;

\frac{6y}{6}= \frac{18}{6}

On simplify we get;

y =3           Hence Proved!





7 0
4 years ago
What fraction of 7 2/5 is 49 1/3?
Digiron [165]

Answer:

8 1/6 / 1 7/8 = 196/45 = 4 16/45 ≅ 4.3555556

Step-by-step explanation:

Conversion a mixed number 8 1/6

to a improper fraction: 8 1/6 = 8 1/6 = 8 · 6 + 1/6= 48 + 1/6 = 49/6

To find new numerator:

a) Multiply the whole number 8 by the denominator 6. Whole number 8 equally 8 * 6/6 = 48/6

b) Add the answer from previous step 48 to the numerator 1. New numerator is 48 + 1 = 49

c) Write a previous answer (new numerator 49) over the denominator 6.

Eight and one sixth is forty-nine sixths

Conversion a mixed number 1 7/8

to a improper fraction: 1 7/8 = 1 7/8 = 1 · 8 + 7/8 = 8 + 7/8= 15/8

To find new numerator:

a) Multiply the whole number 1 by the denominator 8. Whole number 1 equally 1 * 8/8 = 8/8

b) Add the answer from previous step 8 to the numerator 7. New numerator is 8 + 7 = 15

c) Write a previous answer (new numerator 15) over the denominator 8.

One and seven eighths is fifteen eighths

Divide: 49/6 : 15/8 = 49/6 · 8/15 = 49 · 8/6 · 15 = 392/90 = 2 · 196 /2 · 45 = 196/45

Dividing two fractions is the same as multiplying the first fraction by the reciprocal value of the second fraction. The first sub-step is to find the reciprocal (reverse the numerator and denominator, reciprocal of 15/

8 is 8/15

) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. In the next intermediate step , cancel by a common factor of 2 gives 196/45

.

In words - forty-nine sixths divided by fifteen eighths = one hundred ninety-six forty-fifths.

8 0
3 years ago
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