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Dmitriy789 [7]
3 years ago
6

The sum of three times a and four is the same as five yimes a?

Mathematics
1 answer:
Umnica [9.8K]3 years ago
7 0

\text{the sum of three times a and four}:3a+4\\\\\text{five times a}:5a\\\\The\ equation:\\\\3a+4=5a\qquad\text{subtract 3a from both sides}\\\\4=2a\qquad\text{divide both sides by 2}\\\\2=a\to\boxed{a=2}

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You can buy an 8-pack of paper towels for $8.40 or a 12-pack for $12.36. Which is the better buy?
mixas84 [53]

Answer: 12 pack

Step-by-step explanation:

4 0
3 years ago
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
75% of the children at Fisher Elementary walk to school. If there are 200 students at Fisher Elementary, how many walk to school
BlackZzzverrR [31]

Answer: 150 students walk to school

Step-by-step explanation: 75%=0.75

200 multiplied by 0.75

 200×0.75=150 students

            Or

75%=3/4

3/4 of the children walk to school

3/4×200=3/4×200/1=150

4 0
3 years ago
Is this a linear function?
Artemon [7]

Answer:

No

Step-by-step explanation:

No

Because a linear function is the form as

f(x)=ax+b

the highest exponent is one

and the graph is a line in the case of

p(x)=3x^2-4

is a parabola, not a line

8 0
3 years ago
3rs - 5cr - 15cs + 25c2
Montano1993 [528]

3rs-5cr-15cs+25c^2=r(3s-5c)-5c(3s-5c)\\\\=(3s-5c)(r-5c)\\\\Answer:\ \boxed{3rs-5cr-15cs+25c^2=(3s-5c)(r-5c)}

4 0
3 years ago
Read 2 more answers
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