4 years ago

Which of the following is an arithmetic sequence?

Mathematics

1 answer:

solong [7]4 years ago

6 0

Answer:

Step-by-step explanation:

It's adding 7 every time.

So, it's an arithmetic sequence.

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If x varies jointly as y and z,and x=8 when y=4 and a=9,find z when x=16 and y=6

Luda [366]

Answer:

z=12

Step-by-step explanation:

It is given that x varies jointly as y and z, it means

$x\propto yz$

$x=kyz$

$x(y,z)=kyz$

where, k is the constant of proportionality.

It is given that x=8 when y=4 and z=9

$(8)=k(4)(9)$

$8=36k$

Divide both sides by 36.

$\frac{8}{36}=k$

$\frac{2}{9}=k$

The value of k is 2/9.

$x=\frac{2}{9}yz$

We need to find the value of z when x=16 and y=6.

Substitute x=16 and y=6 in the above equation.

$16=\frac{2}{9}(6)z$

$16=\frac{4}{3}z$

Multiply both sides by 3.

$48=4z$

Divide both sides by 4.

$12=z$

Therefore, the value of z is 12.

7 0

4 years ago

Figure ABCD is plotted on a coordinate plane. The figure transforms to create figure A'B'CD'. Which transformation took place?

bulgar [2K]

Answer: A(3,4) A'(-3,4)

B(5,4) B'(-5,4)

C(4,2) C'(-4,2)

D(2,2) D'(-2,2)

Step-by-step explanation:

5 0

4 years ago

Multiplication

mote1985 [20]

Answer:

A. 710

B. 21000

C. ?

D. ?

E.?

F.?

G. 0

H. 110000

Step-by-step explanation:

I can't understand the questions on some of them

8 0

3 years ago

Jack bought a stereo on sale for $231 . The original price was $385 . What was the percent of decrease in a price

Alenkinab [10]

231 / 385 = 0.6 diving the price it is by the price is was gives the answer
= 60%

8 0

3 years ago

Sarah drove 40 miles per hour. In 3 hours, Sarah drove 120 miles. Which is a valid proportion to represent the problem?

olga55 [171]

D=rt 120=40mph*3hours

6 0

3 years ago

Read 2 more answers