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3 years ago

5TH GIVEAWAY! 5 GIVEAWAYS LEFT! EA SPORTS!

Mathematics

2 answers:

erastovalidia [21]3 years ago

7 0

Answer: thank you appreciate it

jeka943 years ago

7 0

Answer:

Step-by-step explanation:TYSM!

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How do I find the average rate of change?

Alenkasestr [34]

Answer:

add them all up together and then divide by the number of items

Step-by-step explanation:

8 0

3 years ago

How many ml of a 20% acid mixture and a 80% acid mixture should be mixed to get 120ml of a 35% acid mixture?

shutvik [7]

Answer:

Volume of Mixture A =90 ml

Volume of Mixture B =30 ml

Step-by-step explanation:

Let say, Mixture A + Mixture B = Mixture C

Volume of Mixture A is x

Volume of Mixture B is y

So, Volume of Mixture C is x+y = 120 ml

Now, Acid contain in Mixture A is 20% =0.2x

Acid contain in Mixture B is 80% =0.8y

Also, Acid contain in Mixture C is 35% =(0.35)(x+y) = 0.35×120=42

Now, we know that,

Acid contain of Mixture A + Acid contain of Mixture B=Acid contain of Mixture C

∴ 0.2x+0.8y=42

∴ 2x+8y=420

We get two linear equations

2x+8y=420 and x+y = 120

Solving above equation...

∴ x=120-y

Replacing x value in 2x+8y=420

∴ 2(120-y)+8y=420

∴ 240-2y+8y=420

∴ 6y=180

∴ y=30

Replacing y value in any equation

∴ x=120-y=120-30=90

∴ x=90

Thus,

Volume of Mixture A is x=90 ml

Volume of Mixture B is y=30 ml

3 0

3 years ago

What is the value of p?

maks197457 [2]

Can you show all the answer choices, so I know if I am correct or not?

7 0

3 years ago

In your biology class, your final grade is based on several things: a lab score, scores on two major tests, and your score on th

Serggg [28]

Answer:

The weighted average is of 69.94.

Step-by-step explanation:

Weighted average:

The weighed average is found multiplying each grade by its respective weight.

The grades, and weights are:

67 on the lab, with a weight of 23% = 0.23

69 on the first major test, with a weight is 21.5% = 0.215

85 on the second major test, with a weight is 21.5% = 0.215.

63 on the final exam, with a weight of 34% = 0.34.

Weighted average:

$A = 0.23*67 + 0.215*69 + 0.215*85 + 0.34*63 = 69.94$

The weighted average is of 69.94.

8 0

3 years ago

If f(x) = x^2 -5x +1 and g(x) =5x+4 what is the value of g•f (-2)

Arlecino [84]

Answer:

The value of $gof (-2)=79$

Step-by-step explanation:

We have

$f(x) = x^2 -5x +1 \\\\f(-2) = (-2)^2 -5\times-2 +1 \\\\=15$

Now we need to find

$gof (-2)=g(15)$

$g(15) =5\times15+4\\\\=79$

5 0

2 years ago