All categories

3 years ago

If ab means 2a + b , then what is 25 ?

Mathematics

2 answers:

rewona [7]3 years ago

5 0

To solve this problem you must apply the proccedure shown below:

If $(a)(b)=2a+b$ , you have that:

$(2)(5)=(2)(2)+5=9$

Because $a=2$ and $b=5$

Therefore, as you can see, the answer is: $9$

Soloha48 [4]3 years ago

5 0

Answer

Explanation

a*b ⇒ 2a + b

2*5 ⇒ ?

Comparing a*b and 2*5, we can say that;

a = 2 and

b = 5

So, substituting a with 2 and b with 5 in the equation 2a + b we have,

a*b ⇒ 2a + b

2*5 ⇒ 2(2) + 5

⇒ (2×2) + 5

⇒ 4 + 5

⇒ 9

You might be interested in

Meghan needs to board her cats and dogs at a kennel while she's on vacation. Pet Hotel charges $42.50 for a cat and $64.00 for a

Alex Ar [27]

Answer:

3 dogs and 2 cats.

Step-by-step explanation:

In this case we can solve it using a 2x2 system of equations, like this:

let x: number of cats

let y: number of dogs

So:

42.5 * x + 64 * y = 277

35.5 * x + 50.5 * y = 222.5 => x = (222.5 - 50.5 * y) /35.5

Replacing, we are left with that:

42.5 * (222.5 - 50.5 * y) /35.5 + 64 * y = 277

266.37- 60.45 * y + 64 * y = 277

64 * y - 60.45 * y = 277 - 266.37

3.55 * y = 10.63

y = 10.63 / 3.55

y = 2.99, about 3

Now to calculate x:

x = (222.5 - 50.5 * 3) /35.5

x = 2

Which means that it has a total of 3 dogs and 2 cats.

3 0

3 years ago

Read 2 more answers

What is the equation of this parabola in vertex form

attashe74 [19]

first off, let's notice the parabola is a vertical one, therefore the squared variable is the x, and the parabola is opening upwards, meaning the coefficient of x² is positive.

let's notice the vertex, or U-turn, is at (-2, 2)

$\bf ~~~~~~\textit{parabola vertex form} \\\\ \begin{array}{llll} \boxed{y=a(x- h)^2+ k}\\\\ x=a(y- k)^2+ h \end{array} \qquad\qquad vertex~~(\stackrel{-2}{ h},\stackrel{2}{ k}) \\\\\\ y=+1[x-(-2)]^2+2\implies y=(x+2)^2+2$