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Bad White [126]
3 years ago
9

Could I have an answer ASAP

Mathematics
1 answer:
Dafna11 [192]3 years ago
8 0

Answer:

\left[\begin{array}{ccc}9\\10\\\end{array}\right]

Step-by-step explanation:

Multiply the elements in a by 3 to obtain 3a

Then add corresponding elements in both matrices for 3a + b , that is

3\left[\begin{array}{ccc}2\\4\\\end{array}\right] + \left[\begin{array}{ccc}3\\-2\\\end{array}\right]

= \left[\begin{array}{ccc}6\\12\\\end{array}\right] + \left[\begin{array}{ccc}3\\-2\\\end{array}\right]

= \left[\begin{array}{ccc}6+3\\12-2\\\end{array}\right]

= \left[\begin{array}{ccc}9\\10\\\end{array}\right]

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Min is twice as tall as her brother . If min is 5feet 3 inches tall how tall is her brother
liubo4ka [24]
5’3 is 63 inches since her brother is 1/3 larger so 63/3= 21 inches
3 0
3 years ago
If f(x)=-2x-3 what is f(r+2) ?
fiasKO [112]

Answer:

f(x) =  - 2x - 3

when x is r + 2 :

f(r + 2) =  - 2(r + 2) - 3 \\  =  - 2r - 4 - 3 \\  =  - 2r - 7 \\  \\ { \boxed{ \boxed{f(r + 2) =  - 2r - 7}}}

4 0
3 years ago
How many 3-digit even numbers are that begin with either 5 or 6?
mojhsa [17]
Answer: 100 3 digit even number that begin with either 5 or 6

Explanation:
Case 1:
A 3 digit that begin with 5 should be 500-599 so there are 100 numbers
But we are only finding even number
So 100/2 = 50 3-digit even number that begin with 5.

Case 2:
A 3 digit that begin 6 should have
600-699 and there are also 100 number including even and odd in total. Since we are only finding even number we get:
100/2 = 50 3-digit even number that begin with 6.

Plus both case together we get 50 3-digit even number that begin with 5 + 50 3-digit even number that begin with 6= 50 + 50 = 100
8 0
3 years ago
Read 2 more answers
Add 1 1/3 + (−5/6) = ?
Aleks [24]
1 1/3 = 4/3 (because (3 * 1 + 1) / 3)

We need both parts of sum to have common denominator.
Second part have denominator = 6.
When we multiply nominator and denominator of first part by 2 we get 8/6 (what is legit operation on fractions)

Now easily add:
8/6 + (- 5/6) = 8/6 - 5/6 = 3/6 (here we can divide both nominator and denominator by 3 to get "nicer" result) = 1/2 
4 0
3 years ago
2/5x=42 HELP!!!!!!!!!<br><br><br><br>pls explain i have to show my work-
ICE Princess25 [194]

Answer:

X = 105

Step-by-step explanation:

<u>2x</u> = 42

5

Multiply both sides by 5

5 × <u>2x</u> = 5×42

5

5 cancle 5

2x = 5 × 42

2x = 210

Divide both sides by 2

<u>2x</u> = <u>210</u>

2 2

x = 105

8 0
1 year ago
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