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3 years ago

8

Calcula un numero sabiendo que la suma de sus dos cifras es 10 y que si invertimos el orden de dichas cifras, el numero obtenido

es 36 unidades mayor que el inicial

1 answer:

emmainna [20.7K]3 years ago

4 0

como es eso entonses me enseñaron mal a mi o que

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Jess is 12 years less than half as old as Mac. The sum of their age is 87. How old is each person?

laila [671]

Answer:

The age of each person is:

Jess is <u>21</u> years old.
Mac is <u>66</u> years old.

Step-by-step explanation:

To solve this problem you must make two equations. First, we name Jess and Mac as variables:

j = Jess age.

m = Mac age.

Now we make the equations, the first equation has the information "Jess is 12 years less than half as old as Mac":

1. $j=(\frac{m}{2})-12$

The second equation has the information "The sum of their age is 87":

2. $j+m=87$

Now, we replace the first equation in the second one:

$(\frac{m}{2}-12) +m=87$

And we operate:

$\frac{m-24}{2} +m=87$
$\frac{m-24+2m}{2}=87$
$\frac{3m-24}{2}=87$

We clear the variable m:

$3m-24=87*2$
$3m=174+24$
$m=\frac{198}{2}$
$m=66$

How we know Mac's age is 66 years old, we can identify Jess' age with the second equation:

$j+m=87$

We replace the value of m:

$j+66=87$

And clear the variable j:

$j=87-66$
$j=21$

In the end, Jess's age is 21 years old.

4 0

3 years ago

A college track team scout watched a 100-meter dash event at a countywide school district track meet. The time in second of each

NNADVOKAT [17]

Where is the plot?????

5 0

3 years ago

jim ran 15.2 miles over the weekend . he ran 6.75 miles on saturday. how many miles did he run on sunday?

kap26 [50]

Subtract 6.75 from 15.2 to find what he did on Sunday, because supposed the number of miles he ran on Sunday was x. Therefore, the formula should be x + 6.75 = 15.2
Solve that, and you should get that Jim ran 8.45 miles on Sunday.

8 0

3 years ago

2. A package of paper towels contains 3 rolls. Each package of paper towels costs $2.79. A function, f(x), is written to represe

kolbaska11 [484]

Answer:

B

Step-by-step explanation:

Let x be the number of packages of paper towels.

Each package of paper towels costs $2.79.

Then x packages of paper towels cost $2.79x.

Hence, a function f(x) is

$f(x)=2.79x$

Practically, you can buy 0 packages, 1 package, 2 packages and so on, only whole numbers of packages, so practical domain is all whole numbers.

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3 years ago

Find the inverse function.<br> f(x) = 3x – 1<br> f-1(x) = x + [?]

tigry1 [53]

Answer:

f-1(x)=x+1/3 is yr answer.

<h3>stay safe healthy and happy .</h3>

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3 years ago