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ale4655 [162]
3 years ago
8

Exponential expression please help

Mathematics
2 answers:
Lelechka [254]3 years ago
8 0

{3}^{ - 2}  =  \frac{1}{9}
Pepsi [2]3 years ago
5 0
The answer to the question is 1/9
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Idk Help meee please
nordsb [41]

Answer:

-9 =x

Step-by-step explanation:

We know these are similar triangles

We can use ratio's to solve

Let CS = y  and XR = y+y or 2y

y           x+19

------ = ------------

2y         x+29

We can simplify the ratio on the left by dividing by y

1           x+19

------ = ------------

2         x+29

Using cross products

1(x+29) = 2(x+19)

Distribute

x+29 = 2x+38

Subtract x from each side

x-x+29 = 2x-x+38

29 = x+38

Subtract 38 from each side

29-38= x+38-38

-9 =x

8 0
3 years ago
Using a graphical method, solve the simultaneous equations x+y =4 and y=2x+1
adoni [48]

Answer:

(1, 3)

Step-by-step explanation:

Given the expression

x+y = 4 ... 1

y = 2x+1 ....2

Substitute equation 2 into 1

x + (2x+1) = 4

3x + 1 = 4

3x = 4-1

x = 3/3

x = 1

Since y = 2x + 1

y = 2(1) + 1

y = 3

Hence the solution to the equation is (1,3). This means that the coordinate point on the graph where both lines intersect will be at (1, 3)

7 0
3 years ago
Identify and explain the error made in the following:<br><br>2x + 8x = 10x^2
Step2247 [10]
It shouldn’t have ^2
8 0
3 years ago
Sam ran 3/5 of a mile in 1/6 of an hour. How far could he run in an entire hour?
Leno4ka [110]

Answer:

3

Step-by-step explanation:

3/5 x 6 = 3 3/5

4 0
3 years ago
Which of the following are NOT sufficient to prove that a quadrilateral is a parallelogram?
Ksenya-84 [330]
The answers are
<span>I. Two pairs of opposite angles congruent. 
II. A pair of adjacent angles are supplementary. </span> 
<span>VIII. The diagonals bisect each other. </span>
3 0
3 years ago
Read 2 more answers
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