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3 years ago

3. HELPPP asaaaaaapppppp

Mathematics

1 answer:

mars1129 [50]3 years ago

3 0

Answer:

$\left[\begin{array}{ccc}7\\4\\2\end{array}\right]$

Step-by-step explanation:

To find the product of two matrices we need to multiply the elements of each row of the first matrix by the elements of each column in the second matrix. Then we should add the products. Then:

$\left[\begin{array}{ccc}3&6&1\\2&4&0\\0&6&2\end{array}\right] \\$ × $\left[\begin{array}{ccc}2\\0\\1\end{array}\right]$ = $\left[\begin{array}{ccc}3x2+6x0+1x1\\2x2+4x0+0x1\\0x2+6x0+2x1\end{array}\right]$ = $\left[\begin{array}{ccc}7\\4\\2\end{array}\right]$

The term "x" refers to the multiplication sign.

Then, the solution is $\left[\begin{array}{ccc}7\\4\\2\end{array}\right]$

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What is four and half minus two three fourths?

Lady bird [3.3K]

Answer:

$1\frac{3}{4}$

Step-by-step explanation:

$4\frac{1}{2} -2\frac{3}{4}$

The way you want to do this is to make all the numbers into a fraction. You do that by multiplying the whole number by the denominator, or the bottom of the fraction, then adding that to the numerator, or the top of the fraction.

So, $4\frac{1}{2}$ becomes $\frac{9}{2}$ , and $2\frac{3}{4}$ becomes $\frac{11}{4}$ .

Then, you find the least common denominator. The least common denominator (LCD) is the smallest number that can be a common denominator for a set of fractions. In our case, that would be 4, since 2 can multiply into 4.

So, $\frac{9}{2}$ is multiplied by 2, and becomes $\frac{18}{4}$ . $\frac{11}{4}$ stays the same.

And finally, you subtract. When subtracting or adding fractions, you leave the denominator alone, and only work with the top number.

So, $\frac{18}{4}-\frac{11}{4}$ , which equals $\frac{7}{4}$ .

Now, you could technically stop there. However, most teachers ask that you put it back into whole number form. To do that, divide the numerator by the denominator, and whatever remains goes back into the fraction.

So, $\frac{7}{4}=1\frac{3}{4}$

That's your answer! Hope this helps.

8 0

3 years ago

angle 0 is in quadrant 1 with sin0 = 2/5. Use the Pythagorean identity, sin^2 0 + cos^2 0 = 1, to calculate the value of cos0 as

Gwar [14]

We know that
sin²x+cos²x=1
so
clear cos x
cos x=(+/-)√[1-sin²x]

in this problem
<span>Angle 0 is in quadrant 1 -----> cos o and sin o are positive
</span>sin o=2/5
cos x=√[1-(2/5)²]----> cos o=√[1-4/25]----> cos o=√[21/25]---> cos o=√21/5

the answer is
cos o=√21/5

7 0

3 years ago

Monster Multiplication Masters

klemol [59]

Answer:

1.) 20,160 cookies, 2.) 37,600 Letters to students in a different country 3.) 252.36 Exact form, Approximate form: 252

Step-by-step explanation:

The first question is written in standard form like this:

Standard Form: 315 x 64 = 20,160

Algebraically/Logical: 315 Packages x 64 Cookies = 20,160 Cookies in All

Therefore, Kenneth bought 20,160 Cookies

The second question is written like this:

Standard Form: 940 x 40 = 37,600

Algebraically/Logical Reasoning: 940 students x 40 letters = 37,600 letters written to students in a different country.

Note: This question has a random P 240, That will be erased so that is why the equation is 940 x 40

The third question is written like this:

Standard Form: 36 x 7.01 = 252.36

Approximate form: 36 x 7 = 252

Algebraically/Logical Reasoning: The standard form would explain it all but if I was answering this question I would round 7.01 to the one's place because there is no way you would get a decimal when trying to solve an even amount of cloths. So there are 36 squares in one table cloth, times that by 7 which is equal to 252 approximently.

7 0

3 years ago

A basketball player participates in a one-and-one free throw situation. The player has a 80% free throw average. What is the pro

jekas [21]

Answer:

80%

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Dam has been asked to post a parcel for a family member. He has been told that the parcel weighs 12 lbs 8 oz.

ira [324]

Answer:

The weight of the parcel is approximately 6 kilograms.

Step-by-step explanation:

The weight of the parcel is 12 lbs and 8 oz.

1 lb = 16 oz

So, 8 oz = lb.

That means, 12 lbs and 8 oz = (12 + 0.5) lbs = 12.5 lbs

Now, 1 lb = 454 g

So, 12.5 lbs = (12.5 × 454) g = 5675 g

As, 1 kilogram = 1000 g

That means, 1 g = 0.001 kilogram

So, 5675 g kilograms. (Rounded to the nearest whole kilogram)

Thus, the weight of the parcel is approximately 6 kilograms.

8 0

3 years ago