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3 years ago

Please whats the answer?

Mathematics

1 answer:

lorasvet [3.4K]3 years ago

5 0

Answer:

=93

Step-by-step explanation:

 $7 \frac{5}{6} + 5 \frac{1}{9}$ 
Then mutiply 6 x7 with will give you 42 then add 5 which will equal =47

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Given that f(x) = x^2 - 11x + 18 and g(x) = x-9, find f(x) + g(x)

liberstina [14]

Answer:

f(x) + g(x) = x² - 10x + 9

General Formulas and Concepts:

Algebra I

Combining Like Terms

Step-by-step explanation:

Step 1: Define

f(x) = x² - 11x + 18

g(x) = x - 9

Step 2: Find f(x) + g(x)

Substitute: f(x) + g(x) = x² - 11x + 18 + x - 9
Combine like terms (x): f(x) + g(x) = x² - 10x + 9

3 0

3 years ago

The ratio of boys to girls in a group is 2:1. If there are 18 more boys than girls, work out how many girls there are.

Alborosie

Answer:

I think its 18, because if there's 2 boys to 1 girl then if there's 18 girls then there is an equivalent 18 boys to match, plus another 18, which would put the ratio of boy to girl at 2:1

Step-by-step explanation:

4 0

3 years ago

Solve by completing a square r^2-8r+9

Tanzania [10]

Solving $r^2-8r+9$ by completing a square gives $(r+4)^2-7$

Step-by-step explanation:

We need to solve the equation $r^2-8r+9$ by completing a square

The completing a square method requires: $a^2\pm 2ab +b^2=(a\pm b)^2$

Solving:

$r^2-8r+9\\=(r)^2-2(r)(?)+(?)^2+9$

We need to add and subtract (4)^2=16 to make the equation a complete square

$=(r)^2-2(r)(4)+(4)^2-(4)^2+9\\=(r)^2-2(r)(4)+(4)^2-16+9\\=(r)^2-2(r)(4)+(4)^2-7\\=(r+4)^2-7$

So, Solving $r^2-8r+9$ by completing a square gives $(r+4)^2-7$

Keywords: Solve by completing a square

Learn more about Solve by completing a square at:

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7 0

3 years ago

A newspaper subscription costs $60. Mary Ellen can get a discount of 25% off through her work. How much will Mary Ellen pay for

AysviL [449]

Answer:

$45

Step-by-step explanation:

6 0

4 years ago

Read 2 more answers

Can you order these please?

Nadusha1986 [10]

By making each of these a decimal, it's easier to see which are bigger or smaller

2.1, 2 2/5, 2 1/2, 2.6, 2.95

2 2/5 = 2.4
2 1/2 = 2.5

4 0

3 years ago

Read 2 more answers