All categories

3 years ago

I need to know the answer for my math class

Mathematics

1 answer:

KatRina [158]3 years ago

3 0

Subtract 18 from each side of the equation. Then you'll see b=0 . Zero is the only thing you can add to 18 and still have 18.

You might be interested in

Which is bigger? 30% or 1/3?

aalyn [17]

Convert them to comparable thingummys

convert to fraction

percent means parts out of 100
30%=30/100=3/10

3/10 vvs 1/3
make bottom number 30

3/10 times 3/3=9/30

1/3 times 10/10=10/30
10/30>9/30

1/3 is bigger

8 0

3 years ago

What's the simplified form of 2x + 3 – X + 5?<br> A.X-2<br> B.X-8<br> C. x+8<br> D. 3x + 8

allochka39001 [22]

Answer:

Step-by-step explanation:

Group like terms

= 2x - x +3 +5

Add the similar 'elements'

= x + 3 + 5

Add the numbers

3 + 5 = 8 + x

= x+8

8 0

2 years ago

Which is the simplified form of r^-7 + s^-12

makkiz [27]

Answer:

The simplified form of r^-7 + s^-12 is ----> 1/r^7 + 1/s^12

Step-by-step explanation:

3 0

2 years ago

A shipment of 50 inexpensive digital watches, including 10 that are defective, is sent to a department store. The receiving de

ddd [48]

Answer: 0.8926

Step-by-step explanation:

Given : A shipment of 50 inexpensive digital watches, including 10 that are defective.

The probability that a digital watch is defective $: p=\dfrac{10}{50}=0.2$

Sample size : n=10

Also, they reject the whole shipment if 1 or more in the sample are found defective.

Using the binomial probability formula :

$P(x)=^nC_xp^x(1-p)^{n-x}$

Let x be the random variable that represents the number of defective watches.

The probability that the shipment will be rejected :-

$P(x\geq1)=1-P(0)\\\\=1-^{10}C_0(0.2)^0(0.8)^{10}\\\\=1-(0.8)^{10}=0.8926258176\approx0.8926$

Hence, the probability that the shipment will be rejected = 0.8926

6 0

2 years ago

Could somebody please explain to me the process of multiplying polynomial fractions?

o-na [289]

I don’t know too can someone help me as welll???

6 0

2 years ago