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2 years ago

Use combining like terms to simplify the expression: 7x+2−5x+4

Mathematics

1 answer:

Artyom0805 [142]2 years ago

6 0

Answer:

2x+6

Step-by-step explanation:

add the numbers:7x+6-5x

combine the like terms:7x+6-5x

2x+6

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100 POINTS WILL MARK BRAINLIEST x^2 − 8x + 13 = 0 Which of the following is the first correct step to write the above equation i

Fed [463]

Answer:

We will add 3 to each side of the equation

Step-by-step explanation:

x^2 − 8x + 13 = 0

We want to complete the square

We will subtract 13 from each side of the equation

x^2 -8x +13 -13 = 0 -13

x^2 -8x = -13

Then take the coefficient of x

-8

Divide by 2

-8/2 = -4

Square it

(-4)^2 = 16

Add this to each side

x^2 -8x +16 = -13+16

( x-4) ^2 = 3

The sum of subtracting 13 and adding 16 is adding 3

7 0

3 years ago

Read 2 more answers

Need help in solving this problem. Section is under limits at infinity, horizontal asymptotes...

mojhsa [17]

<span>(a) you can show the concentration by:

amount of salt / amount of water

amount of salt

= 30g / L

= [ 30 * 25g ] / [ 25L ] , 25L = 1 min

= [ 30 * 25g ] / min

amount of water

= 5000 + 25t

[ 30 * 25t ] / [ 5000 + 25t ]

= [ 30 * 25t ] / 25*[ 200 + t ]

= 30t / [ 200 + t ] yeah

(b)

lim t->∞ [ 30t / ( 200 + t ) ]

= lim t->∞ [ ( (1 / t) * 30t ) / ( (1 / t) * ( 200 + t ) ) ]

= lim t->∞ [ 30 / ( (200 / t) + 1 ) ]

= 30 / ( (200 / ∞) + 1 )

= 30 / 1

= 30

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8 0

3 years ago

Therefore, the formula for the volume of the sphere can be derived by writing an expression that represents the volume of

torisob [31]

Step-by-step explanation:

The volume of a cone can be derived by writing an expression that represents the volume of one cone within the cylinder.

the expression for the volume of a cylinder is

$volume-of-cylinder= \pi r^2h$

the volume of a cone is a part of the volume of a cylinder

$volume-of-cone= \frac{1}{3} \pi r^2h$

Hence the volume of a cone can be derived by dividing the volume of a cylinder by 3

6 0

3 years ago

LabTech is a company that manufactures microscopes and other laboratory instruments . On occasion, one of the microscopes is def

Scrat [10]

Answer:

0.0782 (7.82%)

Step-by-step explanation:

The required probability will be found by using the Binomial Distribution which fits the case of n independent events each with a probability of success equal to p with k successes.

The PMF (Probability Mass Function) is

$f(k,n,p)=\binom{n}{k}p^kq^{n-k}$

Where $q = 1-p$

LabTech states that the probability that a microscope is defective is 0.17%, p=0.0017, q=0.9983. We need to know the probability that k=1 microscope is defective out of a set of n=50 of them. We now apply the formula

$f(1,50,0.0017)=\binom{50}{1}0.0017^10.9983^{49}=0,0782$

Which means that there is a 7.82% of probability to get 1 defective microscope out of the first 50

5 0

3 years ago

If 90 is 30% of a number, what is 200% of the number.

KATRIN_1 [288]

600 becuase 90/.30= 300 and 300*2 =600

6 0

3 years ago