3 years ago

What formula can you use to find the nth triangular number

Mathematics

1 answer:

Ray Of Light [21]3 years ago

6 0

Answer:

xn = n·(n + 1)/2

Step-by-step explanation:

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Robin earned $4,320 in 9 weeks and worked 40 hours in each week. How much did he earn per hour? $ per hour

lys-0071 [83]

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3 years ago

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Un padre tiene actualmente cuatro veces la edad de su hijo. Cuando pasen 5 años, su edad será solo tres veces superior. ¿Qué eda

julsineya [31]

Answer:

I. Hijo, h = 10 años

II. Padre, P = 40 años

Step-by-step explanation:

Sea la edad del padre P.
Sea la edad del hijo h.

Traduciendo el problema verbal a una expresión algebraica, tenemos;

P = 4h .....ecuación 1.

P + 5 = 3(h + 5) ........ecuación 2.

Simplificando aún más, tenemos;

P + 5 = 3h + 15

P = 3h + 15 - 5

F = 3h + 10 ......ecuación 3.

Sustituyendo la ecuación 1 en la ecuación 3;

4h = 3h + 10

4h - 3h = 10

A continuación, encontraríamos la edad del padre;

P = 4h

P = 4 * 10

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2 years ago

Create a model to show 2 × 5.

Sliva [168]

Answer:

The model is shown in the attached picture. The solution is 10.

Step-by-step explanation:

There are two way of showing a model for 2×5

The tape diagram has 2 equal-sized parts of 5
The tape diagram has 5 equal-sized parts of 2

Both models give the same solution:

5+5=10
2+2+2+2+2=10

In the attached picture we can show two types of diagram.

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3 years ago

What is (4/5)x (2/3)please help me out

Vikentia [17]

Answer:

$\frac{8}{15}$

Step-by-step explanation:

$\frac{4}{5}$ × $\frac{2}{3}$ ( multiply values on numerators/ denominators together )

= $\frac{4(2)}{5(3)}$ = $\frac{8}{15}$

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2 years ago

Asap

adoni [48]

Lower Quartile-21
Upper Quartile-52
Interquartile Range- 31

Hope this helps !!

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3 years ago

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