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djverab [1.8K]
2 years ago
9

Which expression is equivalent to 9–2?

Mathematics
2 answers:
Dennis_Churaev [7]2 years ago
7 0
6+1
8-1
10-3
14-7
Theses are also equal to ur answer
Montano1993 [528]2 years ago
4 0

Answer:

1/81

Step-by-step explanation:

You might be interested in
14k²+49k+21 factorise<br>​
irina [24]

Answer:

(2k+1)(k+3)

Step-by-step explanation:

14k²+49k+21

simplify by dividing the whole equation by 7

2k²+7k+3

factorise

(2k+1)(k+3)

6 0
3 years ago
A 2 by 3 rectangle contains 8 squares. A 3 by 4 rectangle contains 20 squares. A 4 by 6 rectangle contains 50 squares. What size
scZoUnD [109]

Answer:

The rectangles that have exactly 100 squares are 1 by 100  4 by 11 and 5 by 8

Step-by-step explanation:

The given parameters are;

A 2 by 3 rectangle contains 8 squares

A 3 by 4 rectangle contains 20 squares

A 4 by 6 rectangle contains 50 squares  

We note that the number of squares varies proportionately to the increase in the dimension of the rectangle, that is we have;

2 by  3 rectangle contains 8 squares

3 by 4 rectangle contains 20 squares increase by 12 = 3 × 4

4 by 5 rectangle contains 40 squares increase by 20 = 4 × 5

The number of squares formed can therefore be arranged in a matrix as follows(please see attached matrix);

Column,     1,       2,     3,      4,       5,     6,        7,       8,         9,           10,         11

Row

1

2

3

4

5

6

7

8

9

10

11

It will be observed that after reaching a point where the row and column are equal, (x, x) the rate of increase in the number of squares become constant and equal to x × ((x - 1) × 0.5) + 1) = x × (x + 1)/2

From the matrix, the rectangles that have exactly 100 squares are 1 by 100  4 by 11 and 5 by 8 and there are no more as presented in the attached matrix, the number of squares formed keeps increasing for each column and row added.

4 0
3 years ago
What's the answer -5+ 8x - 9 = 3x+3)​
Vika [28.1K]
We collect like terms
8x - 3x = 3 + 5 + 9
This is bcos if a (-) sign crosses the equals sign it becomes a (+), and if a (+) sign crosses the equals sign it becomes (-)
We the have
5x = 17
Divide both sides by 5
x = 17/5
x = 3.4
5 0
2 years ago
Graph y=sin^-1 (1/4 x) on the interval -5≤x≤5.
GaryK [48]

Answer:

D

Step-by-step explanation:

The arcsine (\sin^{-1}) function of x is defined as the inverse sine function of x when -1≤x≤1.

So, when

-4\le x\le 4,

we have that

-1\le \dfrac{1}{4}x\le 1.

This gives us the domain -4\le x\le 4 of the function y=\sin^{-1}\left(\dfrac{1}{4}x\right).

The range of the function y=\sin^{-1}x is -\dfrac{\pi }{2}\le x\le \dfrac{\pi }{2}, so the range of the function y=\sin^{-1}\left(\dfrac{1}{4}x\right) is the same (options A and C are false).

When x=-4,

y=\sin^{-1}\left(\dfrac{1}{4}\cdot (-4)\right)=\sin^{-1}(-1)=-\dfrac{\pi}{2}.

So, option B is false and option D is true.

4 0
2 years ago
If 9p-36=-18 what is the value of p
zaharov [31]

Answer:

P=2

Step-by-step explanation:

9p-36+36=-18+36

9p=18

9p\9 = 18/9

P=2

4 0
3 years ago
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