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3 years ago

How do you know whether an ecuation is an identity? How many solutions does an identity have? Explain

1 answer:

6 0

Answer: D. An equation is an identity if it can be rewritten as 0 =0. Such an equation has an infinite number of solutions because it reduces to a true statement regardless of the value of the variable.

Step-by-step explanation:

For an identity equation ; The value on the right and left hand side of the equation are equal :

Left hand side = Right hand side

The solution to an identity solution is infinite because the equation holds true for every value substituted for the variable.

Hence, for every value substituted in for the variable in the equation, the equation is a true statement.

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A political pollster wants to know what proportion of voters are planning to vote for the incumbent candidate in an upcoming ele

balandron [24]

Answer:

$1.\ \ np\geq 10\\\\2.\ \ n\geq 10x$

Step-by-step explanation:

-Let x be the sample size and n the population size

-The conditions for a one-sample proportion z-test are:

-The sample is randomly selected from the population.

-The sample size is greater than or equal to ten times the population size:

$n\geq 10x\\\\n=2000\\x=150\\10x=1500\\\therefore n\geq 10x$

-The expectation np is greater than or equal to 10:

$np\geq 10\\n=2000, p=0.6\\np=1200\\\\Hence, np\geq 10$

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3 years ago

Which of these is an equation?

Hatshy [7]

Answer:

now please make me brainliest ok

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2 years ago

Angie’s Bake Shop makes birthday chocolate chip cookies that cost $2 each. Angie expects that 7% of the cookies will crack and b

soldi70 [24.7K]

Answer:

I kept coming up with $3.56

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

Write an equation parallel to y=3x−1 and goes through the point (-2, -13)

solong [7]

Answer:

y=3x-7

Step-by-step explanation:

we use the equation of the line:

y=mx+b

if the line is parallel, then the slope(m) of the line stays the same:

y=3x+b

we then substitute the ordered pair into the equation and solve for b:

-13 = 3(-2)+b

-13 = -6+b

-13+6 = b

-7 = b

now we substitute the b value into the original equation and the answer:

y=3x-7

Hope this helps :)

4 0

2 years ago

What’s equivalent to -5/20

Andrej [43]

$-\frac{1}{4}$
Just simplify the 5/20 and keep the negative

6 0

2 years ago