3 years ago

Find the 21st term of the arithmetic sequence with a first term

Mathematics

1 answer:

larisa86 [58]3 years ago

7 0

At this case it could be calculated like this: 7+5*20=107

You might be interested in

What's an expression that can be used to multiply 6 x 198 mentally

disa [49]

Sense it is metal math you do 6 x 200

3 0

3 years ago

Read 2 more answers

What is the volume of this sphere?

photoshop1234 [79]

Answer:

3052.08

Step-by-step explanation:

We use the volume formula for spheres

$\frac{4}{3}$ πr³

Plug in 9cm for radius and evaluate

$\frac{4}{3}$ π(9)³

$\frac{4}{3}$ π*729

3052.08

6 0

2 years ago

(x-4) (2x+5)(x+7) (x+7)(3x-4)(2x-5) simplify it pls

Nataly_w [17]

Answer: 12x^6+104x^5-319x^4-2890x^3+4661x^2+14000x-19600 sorry I don't have enough time to explain I got to go hope that helps tell me if I was right or not bye!

Step-by-step explanation:

3 0

2 years ago

I will give multiple brainlist to people who help me with these slides!

lesantik [10]

Answer:

A)6

B)ST

Step-by-step explanation:

A if u turn it, 15 is equal to the 10

15/9=10/x

x=90/15

x=6

B) Turn it so #2 is facing up.

ST is the same.

Hope this helps plz hit the crown :D

4 0

2 years ago

Read 2 more answers

A hovercraft takes off from a platform. Its height (in meters), xx seconds after takeoff, is modeled by: h(x)=-2x^2+20x+48h(x)=?

tangare [24]

Answer: 5 seconds

Step-by-step explanation:

Maximum height is the y-value of the vertex. The number of seconds at maximum height is the x-value (aka axis of symmetry).

h(x) = -2x² + 20x + 48

a=-2 b=20 c=48

Axis of symmetry: x = $\frac{-b}{2a}$

= $\frac{-20}{2(-2)}$

= $\frac{-20}{-4}$

= 5

8 0

3 years ago

Read 2 more answers