3 years ago

What two numbers multiply to 50 and add up to -15

Mathematics

1 answer:

Deffense [45]3 years ago

6 0

Answer:

-10 and -5

- have a great day

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A chemist needs 90 milliliters of a 25% solution but has only 16% and 43% solutions available

Stels [109]

Let f be amount of 43% and s be amount of 16%...

s+f=90, f=90-s

(.16s+.43f)/90=.25 using f found above we get:

(.16s+.43(90-s))/90=.25

.16s+38.7-.43s=22.5

-.27s=-16.2

s=60, and since f=90-s, f=30

So the chemist will need to mix 60ml of 16% solution with 30ml of 43% solution to create 90ml of a 25% solution.

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3 years ago

Given: is a diameter m 1 = 100° m BC= 30° m AD= 50 80 100

olganol [36]

Answer:

100

Step-by-step explanation:

1=ad=100

and I need more characters so don't mind me.

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4 years ago

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What’s 21.84 divided by 8

Lady_Fox [76]

Answer:

2.73

Step-by-step explanation:

You could use a calculator if your teacher/instructor lets you! :)

OR you could do long division.

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3 years ago

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You are determining the mass of an object using a triple beam balance. When the pointer is lined up with the zero mark, the ride

Molodets [167]

328 grams is the mass.

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3 years ago

g Disco Fever is randomly found in one half of one percent of the general population. Testing a swatch of clothing for the prese

Marizza181 [45]

Answer:

The probability that the result is positive is P=0.04475=4.475%.

Step-by-step explanation:

We have the events:

D: disease present

ND: disease not present

P: test positive

F: test false

Then, the information we have is:

P(D)=0.005

P(P | D)=0.99

P(P | ND)=0.04

The total amount of positive test are the sum of the positive when the disease is present and the false positives (positive tests when the disease is not present).

$P(P)=P(P | D)*P(D)+P(P | ND)*(1-P(D))\\\\P(P)=0.99*0.005+0.04*0.995\\\\P(P)=0.00495+0.0398=0.04475$

The probability that the result is positive is P=0.04475.

5 0

4 years ago