3 years ago

The first square number is 1, and the sum of the first 20 square numbers is 2870.

Mathematics

1 answer:

musickatia [10]3 years ago

7 0

21²=21×21
21×21=441

2,870+441=3,221

You might be interested in

Write the equation for a line in standard form (Ax+By+C) that is perpendicular to y = 3x -

salantis [7]

Answer:

x+3y-6=0

Step-by-step explanation:

given eqn is y=3x-2 which is 3x-y-2=0

the eqn of line perpendicular to given eqn is -x+3y+k=0

it passes through (6,4)

-6+3*4+k=0

or,. -6+12+k=0

or, k= -6

therefore, the eqn of line perpendicular to given eqn is x+3y-6=0

8 0

3 years ago

Which of the following best describes the technique used to graph the equation y = 9x + 4using the slope and y-intercept? Mark a

marissa [1.9K]

Answer:

is d

Step-by-step explanation:

4 0

3 years ago

Alan averages 10 hits out of 25 shots at the target. What is the chance that he will hit his next two attempts?

Sveta_85 [38]

The answer is that he has a 40% chance 10*100=1000 1000/25=40 Making it a 40% chance

6 0

2 years ago

Ten times a number, x, is one-half the sum of the number and three.

kirill [66]

Answer:

10x=1/2(x+3)

Step-by-step explanation:

Hope it helps :)

Brainliest pls? Have a good day/night

4 0

3 years ago

NO LINKS I will give brainliest, it’s a graph pls answer if you know how. Where are the smart people

Nataly_w [17]

Answer:

The answer for (a) is at the picture

(b) The vertex is (-2,7)

(d) -(x+2)^2+7 the turning point is at (-2,7) since it is where the group curves

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers