3 years ago

Help plz it easy math for people above 6th grade

2 answers:

7 0

Your coefficient is the number and your variable is the letter. So in this case your coefficients are 9 and 20 and your variables are x and y!

Lana71 [14]3 years ago

6 0

Coefficients are 9 and 20
variables are x and y

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Given that y varies jointly as x and z, and y = 13 when x = 5

seraphim [82]

Step-by-step explanation:

y=kxz

13=k x 5 x 8

13= 40k

K=13/40

a. y=13/40 x 4 x 10

y=13/40 x 40

y=13

b. 20=13/40 x x x 12

20=13/40 x 12x

20=156x

20 x 40=156x

800=156x

X=800

156

X=200

X=5 5/39

C. 15=13/40 x 6 x z

15=78z

15x40=78z

600=78z

Z=600

Z=100

Z=7 9/13

6 0

3 years ago

The length of a rectangle is 5 units more than twice its width. Find an expression for the perimeter of the rectangle.

kolezko [41]

The width would be 10
length would be 15

8 0

3 years ago

Evaluate the series 4 sigma n=1 n+4

musickatia [10]

Answer:

$\sum _{n=1}^4n+4=26$

Step-by-step explanation:

Given : $\sum _{n=1}^4\:n+4$

We have to evaluate the sum.

Consider , the given sum $\sum _{n=1}^4\:n+4$

Apply the sum rule, $\sum a_n+b_n=\sum a_n+\sum b_n$

we have,

$=\sum _{n=1}^4n+\sum _{n=1}^44$

Consider $\sum _{n=1}^4n$ first,

Applying sum formula, $\sum _{k=1}^nk=\frac{1}{2}n\left(n+1\right)$

Here, n = 4, we get,

$=\frac{1}{2}\cdot \:4\left(4+1\right)$

$\sum _{n=1}^4n=10$

Now consider $\sum _{n=1}^44$

$\mathrm{Apply\:the\:Sum\:Formula:\quad }\sum _{k=1}^n\:a\:=\:a\cdot n$

$=4\cdot \:4=16$

Therefore, $=\sum _{n=1}^4n+\sum _{n=1}^44=10+16=26$

Thus, $\sum _{n=1}^4n+4=26$

6 0

4 years ago

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The box plots show the student grades on a chapter test compared to the grades on a retest in the same class. Box plots titled C

a_sh-v [17]

Answer:

Step-by-step explanation:

8 0

3 years ago

1. What is the general form of the equation for this line y-5= -3(x + 4)?

ivanzaharov [21]

Answer:

I think its B

8 0

2 years ago

Read 2 more answers

Help plz it easy math for people above 6th grade​

Help plz it easy math for people above 6th grade