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astraxan [27]
3 years ago
8

Help please anyone .....

Mathematics
2 answers:
Grace [21]3 years ago
8 0

Answer:

I personally don’t know

Step-by-step explanation:

LOOK IN YOUR NOTES

Oksi-84 [34.3K]3 years ago
6 0

Answer:

D: \begin{pmatrix}10&-5\\ -4&7\end{pmatrix}

Step-by-step explanation:

\begin{pmatrix}5&0\\ 3&-5\end{pmatrix}\begin{pmatrix}2&-1\\ 2&-2\end{pmatrix}

\begin{pmatrix}5\cdot \:2+0\cdot \:2&5\left(-1\right)+0\cdot \left(-2\right)\\ 3\cdot \:2+\left(-5\right)\cdot \:2&3\left(-1\right)+\left(-5\right)\left(-2\right)\end{pmatrix}

\begin{pmatrix}10&-5\\ -4&7\end{pmatrix}

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bija089 [108]
The answer is B bc 8 time is the radius squared times pi
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3 years ago
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Ron bought a keychain for $7 and 3 t-shirts. He spent a total of $37. How much does each t-shirt cost?
White raven [17]

Answer:

$10

Step-by-step explanation:

Subtract the price of the keychain, $7, from the total to find the price of the 3 t-shirts:

$37 - $7 = $30

The 3 t-shirts cost a total of $30.

We assume all t-shirts have the same price.

price of 1 t-shirt = $30/3 = $10

Answer: $10

4 0
3 years ago
Find the prime factors of 60 by dividing by prime numbers.​
Mars2501 [29]

Let's start with the smallest prime number 2

60/2 = 30

Divide that result over 2

30/2 = 15

We can't divide this by 2 because 15/2 = 7.5 isn't a whole number

Let's move onto 3

15/3 = 5

The result is a prime number, so we stop.

The values we divided as denominators were: {2, 2, 3}

We add the result 5 to the set to completely list all of the prime factors of 60

The prime factorization would be

<h3>60 = 2*2*3*5</h3>

which is the same as saying

<h3>60 = 2^2*3*5</h3>
7 0
3 years ago
Alexis washes 10 1/2 windows in 3/4 hours. At this rate, how many windows can she wash in one hour?
Zepler [3.9K]

Alexis can wash a total of 14 windows in 1 hour

<h3><u>Solution:</u></h3>

Given that Alexis washes 10\frac{1}{2} windows in \frac{3}{4} hours

<u><em>To find: </em></u>number of windows washed in one hour

To simplify the calculations we will convert the given mixed fraction to improper fraction

\begin{array}{l}{=10 \frac{1}{2}} \\\\ {=\frac{2 \times 10+1}{2}} \\\\ {=\frac{21}{2}=10.5}\end{array}

Hence, to wash 10.5 windows, Alexis takes 0.75 hours

Let "n" be the number of windows washed in 1 hour

10.5 windows ⇒ 0.75 hours

"n" windows ⇒ 1 hour

By cross-multiplication we get,

n \times 0.75 = 10.5 \times 1

n = \frac{10.5}{0.75} \\\\n = 14

Thus Alexis can wash 14 windows in one hour

4 0
4 years ago
PLEASE ANSWER!!! I WILL GIVR U BRAINLIEST!!
Tpy6a [65]

Answer:

k = 5

Step-by-step explanation:

The standard form of an equation representing proportionality is

y = kx ← k is the constant of proportionality

y = 5x ← is in standard form

with k = 5

6 0
3 years ago
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