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2 years ago

I dont know what it is and its for ten pointsss

Mathematics

2 answers:

labwork [276]2 years ago

7 0

Answer:

Step-by-step explanation:

anything with a power of 0 is 1

pochemuha2 years ago

3 0

Answer:

Step-by-step explanation:

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Please see the question and solve plz

Korolek [52]

Answer:

Step-by-step explanation:

sin²β + sin²β×tan²β = tan²β

sin²β( 1 + tan²β ) = tan²β

~~~~~~~~~~~~~~~~

sin²β + cos²β = 1

$\frac{sin^2\beta }{cos^2\beta }$ + $\frac{cos^2\beta }{cos^2\beta }$ = $\frac{1}{cos^2\beta }$ ⇒ tan²β + 1 = sec²β ⇔ 1 + tan²β = sec²β

~~~~~~~~~~~~~~

1 + tan²β = $\frac{1}{cos^2 \beta }$

L.H. = sin²β ( $\frac{1}{cos^2 \beta }$ ) = tan²β

R.H. = tan²β

7 0

3 years ago

A sample of 100 people is classified by gender (male/female) and by whether they are registered voters. The sample consists of 8

uysha [10]

Answer:

Step-by-step explanation:

Given :

Male Female Total

Registered 60

Non registered 40

Total 20 80

Solution :

N= 100

Formula of expected frequency = $E_{ij}=\frac{T_i \times T_j}{N}$

$E_{ij}$ = expected frequency for the ith row/jth columm.

$T_i$ = total in the ith row

$T_j$ = total in the jth column

N = table grand total.

So, using formula $E_{11}=\frac{T_1 \times T_1}{100}$

$E_{11}=\frac{60 \times 20}{100}$

$E_{11}=12$

$E_{12}=\frac{T_1 \times T_2}{100}$

$E_{12}=\frac{60 \times 80}{100}$

$E_{12}=48$

$E_{21}=\frac{T_2 \times T_1}{100}$

$E_{21}=\frac{40 \times 20}{100}$

$E_{21}=8$

$E_{22}=\frac{T_2 \times T_2}{100}$

$E_{22]=\frac{80 \times 40}{100}$

$E_{22}=32$

Expected frequency table

Male Female Total

Registered 12 48 60

Non registered 8 32 40

Total 20 80

So, the expected frequency for males who are registered voters are $E_{11}=12$

5 0

3 years ago

2x + 25x9 +3 What would x be for it to be equal

andrey2020 [161]

Answer:

X=144

Step-by-step explanation:

2X+25×9+3=0

2X+288

2X= -288

X= -144

8 0

2 years ago

In this equation, is (1, 5) a solution? *

monitta

Answer:

No (1,5) is not a solution

Step-by-step explanation:

if you try to solve this equation with the (1,5), you lay it out like 5 = 1/4 * 1 - 7. It turns into 5 = 1/4 - 7, because 1 times anything is that same number. Then you have to add 7 to both sides so that it cancels out on the right and you get 12 on the left. So you end up with the equation 12 = 1/4. This equation is not true, so therefore (1,5) is not a solution. Hope this helps :)

8 0

3 years ago

Please Help! Best gets Brainlest

Len [333]

Answer:

A. g=11

Step-by-step explanation:

We want to find which choice makes the equation true. Let's plug in each answer choice.

A. g=11

26=7(11-9)+12

26= 7(2)+12 Solve inside the parentheses.

26= 14+12 Multiply 7 and 2.

26= 26 Add 14 and 12.

This answer must be correct, but let's check the other choices .

B. g=12

26=7(12-9)+12

26= 7(3)+12 Solve inside the parentheses.

26= 21+12 Multiply 7 and 3.

26≠33 Add 14 and 12.

This choice is not correct.

C. g= 13

26=7(13-9)+12

26= 7(4)+12 Solve inside the parentheses.

26= 28+12 Multiply 7 and 4.

26≠40 Add 28 and 12.

This is also not correct.

D. g= 14

26=7(14-9)+12

26= 7(5)+12 Solve inside the parentheses.

26= 35+12 Multiply 7 and 5.

26≠47 Add 35 and 12.

This choice is not correct either.

The value of g that make the expression 26=7(g-9)+12 a true statement is A. g=11.

5 0

3 years ago