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3 years ago

How to describe an inequality in your own words

1 answer:

8 0

An inequality: a number sentence with ≤, ≥, <, >, = or ≠
≤ means: "less than or equal to"
≥ means: "greater than or equal to"
< means: "less than"
> means: "greater than"
≠ means: "not equal to"
= means: "equals"

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If tñ=2ñ+3, find S10

Allisa [31]

Answer:

$S_{10}=280$

Step-by-step explanation:

Given that,

$t_n=2n+3$ ...(1)

We need to find the value of $S_{10}$ .

Put n = 1 to find the first term.

$t_1=2(1)+3=5$

Put n = 2 to find the second term.

$t_2=2(2)+3=7$

Put n = 3 to find the third term.

$t_3=2(3)+3=9$

Put n = 10 to find the tenth term.

$t_{10}=2(10)+3=23$

It means we need to find the sum of 5,7,9,.....,23.

The formula for the sum of n terms is given by :

$S_=\dfrac{n}{2}(a+a_n)$

We have, n = 10, a = 5 and $a_n=23$

So,

$S=\dfrac{10}{2}(5+23)\\\\S_{10}=10\times 28\\\\=280$

So, the value of $S_{10}$ is equal to 280.

3 0

3 years ago

I need help 1 through 5 for now

bazaltina [42]

1. 3x
2. x
3. 6x
4. 3x
5. 6x

6 0

3 years ago

Tera buys 10 pencils for $1.99. About how much $ does each pencil cost?

True [87]

Answer:

19 cents or 0.199

Step-by-step explanation:

Hope it helped!

8 0

2 years ago

Read 2 more answers

Solve the equation. 12=2+z/-6

Bogdan [553]

Answer:

$\boxed{\bold{z=-60}}$

Step-by-step explanation:

Switch Sides

$\bold{2+\frac{z}{-6}=12}$

Subtract 2 From Both Sides

$\bold{2+\frac{z}{-6}-2=12-2}$

Simplify

$\bold{\frac{z}{-6}=10}$

Multiply Both Sides By -6

$\bold{\frac{z\left(-6\right)}{-6}=10\left(-6\right)}$

Simplify

$\bold{z=-60}$

3 0

3 years ago

Read 2 more answers

Jessica has an account with a credit union. Her account earns 2.5% simple interest yearly. Exactly a year and a half ago, she op

Vlad [161]

Ans: I = P*r*t = 900*0.023*1.5 = $31.50

I hope this help

5 0

3 years ago