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3 years ago

It takes violet 3/5 hour to paint a chair. How much of the chair will be finished after 1/3 hour? Plz answer this plzzzzz!!

Mathematics

1 answer:

Anon25 [30]3 years ago

5 0

The anwser is c your welcome

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Find (3a2 - 2a + 4) - (a2 - 3a + 7) .

melisa1 [442]

<span>(3a^2 - 2a + 4) - (a^2 - 3a + 7) = (distribute the negative sign)
3a^2 - 2a +4 - a^2 + 3a - 7 = (add like terms)
2a^2 + a - 3
So, the answer is A!

</span>

6 0

3 years ago

Two of the steps in the derivation of the quadratic formula are shown below.

Alexeev081 [22]

Taking the square root of both sides of the equation. on e2020

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3 years ago

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Calculate the unit price ($/g) of a 20g jar of sugar. The cost of a jar is $5.00.

BlackZzzverrR [31]

Answer:

$0.25/g

Step-by-step explanation:

20g --- $5.00

1g --- $\frac{1}{20}$ × $5.00 = $0.25

7 0

3 years ago

A medical device company knows that 11% of patients experience injection-site reactions with the current needle. If 4 people rec

Orlov [11]

Answer: 0.6274

Step-by-step explanation:

Given: The proportion of patients experience injection-site reactions with the current needle : p=0.11

Sample size : n= 4

Let x be a binomial random variable that represents the people get an injection-site reaction.

Binomial probability formula: $P(X=x)= ^nC_x p^x(1-p)^{n-x}$

The required probability : P(x=0)

$=\ ^4C_0(0.11)^0(1-0.11)^4\\\\=(1)(1)(0.89)^4\\\\=0.62742241\\\approx0.6274$

Hence, the probability that none of the 4 people get an injection-site reaction = 0.6274

6 0

4 years ago

A bicycle tire is 28 inches in diameter.

Andrej [43]

Answer:

Option A.) 88 inches

Step-by-step explanation:

step 1

Find the circumference of the wheel

we know that

The circumference of a circle is equal to

$C=\pi D$

we have

$D=28\ in$

$\pi =\frac{22}{7}$

substitute

$C=(\frac{22}{7})(28)=88\ in$

8 0

3 years ago