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DedPeter [7]
3 years ago
6

What am I doing wrong?

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
3 0
You didn't put x in !

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I need help on this. An answer and an explanation would be great!!
charle [14.2K]

Answer:

60 & 55

Step-by-step explanation:

1. the sum of the angles 1; 2 and 3 is 180°, then

m∠1=m∠2=m∠3; ⇒m∠3=60°;

2. m∠3=m∠r; ⇒ m∠r=60°;

3. m∠α= 180-(m∠r+65°)°; ⇒ m∠α=55°

all the details are in the picture.

4 0
3 years ago
A botanist wishes to estimate the typical number of seeds for a certain fruit. She samples 41 specimens and counts the number of
e-lub [12.9K]

Answer:

(53.3; 56.1)

Step-by-step explanation:

Given that:

Sample size, n = 41

Mean, xbar = 54.7

Standard deviation, s = 5.3

Confidence level, Zcritical at 90% = 1.645

Confidence interval :

Xbar ± Margin of error

Margin of Error = Zcritical * s/sqrt(n)

Margin of Error = 1.645 * 5.3/sqrt(41)

Margin of Error = 1.362

Lower boundary = 54.7 - 1.362 = 53.338

Upper boundary = 54.7 + 1.362 = 56.062

(53.3 ; 56.1)

6 0
3 years ago
Find the value of A that makes the following equation true for all values of x. (1/7)^x = A^-9x.
elena-14-01-66 [18.8K]

Answer:

D

Step-by-step explanation:

(1/7)^(x)=A^(-9x)

(1/7)^(x)=(A^(-9))^x

A^(-9)=1/7

A=(1/7)^9

3 0
3 years ago
10x - 4.5 + 3x = 12x - 1.1<br><br>x=​
Yanka [14]

Answer:

x=3.4

Step-by-step explanation:

I could be wrong but I'm pretty sure this is the answer.

5 0
2 years ago
A lot is 60 m by 41 m. A house 33 m by<br>9 m is built on the lot. How much area is left over?​
Ainat [17]

Answer:

There is 2163 m^2 left

Step-by-step explanation:

(60*41)-(33*9)=2163

6 0
3 years ago
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