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sergeinik [125]
2 years ago
11

Help me please i don’t get it

Mathematics
1 answer:
Fofino [41]2 years ago
7 0

Answer:

4

Step-by-step explanation:

Both triangles are the same shape, just to different scales. In order to find out the length of side AB in triangle ABC, you have to find out the length of side PQ in triangle PQR and how much bigger than side AB is.

You can tell that sides AC and PR are similar, and 30/5 is 6. You see also that sides BC and QR are similar, and 42/7 is also 6. We have now discovered that triangle PQR is 6 times bigger than triangle ABC.

So now, to find the length of the missing side, we have to shrink side PQ by 6.  24/6 is 4. Therefore, the length of side AB is 4.

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Determine the values of a, b, and c for the quadratic equation<br><br> 3x2−5x+6=0
sweet-ann [11.9K]

Answer:

The values of a, b, and c for the quadratic equation

a=3

b=-5

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7 0
3 years ago
Read 2 more answers
The mean of 10 values is 19. If further 5 values are
Leokris [45]

Answer:

22

Step-by-step explanation:

Pretend the 10 values in the first sentence are a,b,c,d,e,f,g,h,i,j

Pretend the addition 5 values is k,l,m,n,o

So the mean of all the 15 data is (a+b+c+d+e+f+g+h+i+j+k+l+m+n+o)/15=20

So the sum of all 15 data is  a+b+c+d+e+f+g+h+i+j+k+l+m+n+o=300                since 15(20)=300

Now let's look at the first 10:  We have their mean so we can write:

(a+b+c+d+e+f+g+h+i+j)/10=19

so a+b+c+d+e+f+g+h+i+j=190                               since 10(19)=190

So that means using our first sum equation and our equation sum equation we have

190+k+l+m+n+o=300

      k+l+m+n+o=300-190

      k+l+m+n+o= 110

So the average of those 5 numbers mentioned in your problem is 110/5=22

3 0
3 years ago
How much would you need to deposit in an account now in order to have $3000 in the account in 15 years? Assume the account earns
Rzqust [24]

Answer:

Principal = Total ÷ (1 + Rate)^years

That formula is found here: http://www.1728.org/compint2.htm

Principal = 3.000 / (1.03) ^ 15

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Principal = $1,925.59

Step-by-step explanation:

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kompoz [17]
Whereas the basic formula for the area shape is length x width the basic formula for volume is length x width c height
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A dollar bill is about 0.00011 meter thick. What is this thickness in scientific notation?​
inn [45]

Answer:

1.1×10^-4

Step-by-step explanation:

we move the point from where to in between 1.1 and counts the number of numbers it has crossed..in this case it 4...which should be -4

6 0
3 years ago
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