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2 years ago

Whats this problem i need help

Mathematics

1 answer:

Eva8 [605]2 years ago

6 0

Answer:

perimeter of triangle=sum of all sides

perimeter of triangle = 3/10ft + 3/10ft + 1/10ft

perimeter of triangle =7/10ft

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If you add Natalie's age and Fred's age, the result is 41. If you add Fred's age to 4 times Natalie's age, the result is 86.

max2010maxim [7]

Answer:

Fred = 26, Natalie = 15

Step-by-step explanation:

N + F= 41 // N = 41 - F (eqn 1)

4N + F = 86 (eqn 2)

sub eqn 1 into eqn 2

4(41 - F) + F = 86

164 - 4F + F = 86

-3F = - 78

F = 26

sub F = 26 into eqn 1

N = 41 - F

N = 41 - 26

N = 15

3 0

3 years ago

In a fruit cocktail, for every 15 ml of orange juice you need 25 ml of apple juice and 10 ml of coconut milk. What proportion of

stepladder [879]

If you sum the amounts of each ingredient, you have a total of

$15+25+10 = 50$

So, the whole cocktail is 50ml. Of these, 10 are coconut milk. So, the ratio coconut : total is

$\dfrac{10}{50} = \dfrac{1}{5}$

5 0

3 years ago

Read 2 more answers

In apirl is rained 1/4 of a inch on 15 diffret day how many inches of rain fell

Ne4ueva [31]

In $15$ diffret days $15/4$ inches of rain fell in April month if every day rained $1/4$ of a inch .

How to find the rain fell in $15$ diffret days ?

We know that rain in every day is $1/4$ of a inch

So for $15$ days

$1/4+1/4+1/4+......15times\\=15/4$

So in $15$ diffret days in April rain fell is $15/4$ inches.

Learn more about the rain fall is here :

brainly.com/question/28049911

#SPJ4

8 0

1 year ago

When making a fruit salad, a chef chooses 7 fruits from 10 that are in season. how many different fruit salads can the chef crea

Furkat [3]

For this example, we must combine not permutate; this because a salad in which you first use apple then tomato is the same as the one in which you use first tomato then apple, so order does not matter.

Me must do "10 combine 7" which is written by the binomial coefficient $(_{7} ^{10})$ ; in general a binomial coefficient is written by:
$(_{k} ^{n})= \frac{n!}{k!(n-k)!}$

In which $n$ and $k$ are positive integers, such that $n\ \textgreater \ k$ .

So, for this problem:
$(_{7} ^{10})= \frac{10!}{7!(10-7)!}=\frac{10!}{7!3!}= \frac{10*9*8}{3*2}=10*3*4=120$

Hence, there are 120 different ways to make the fruit salad.

5 0

2 years ago

A cup of coffee contains about 100 mg of caffeine. Caffeine is metabolized and leaves the body at a continuous rate of about 12%

Mamont248 [21]

Answer:

a. $A = C_{0}(1-x)^t\\x: percentage\ of \ caffeine\ metabolized\\$

b. $\frac{dA}{dt}= -11.25 \frac{mg}{h}$

Step-by-step explanation:

First, we need tot find a general expression for the amount of caffeine remaining in the body after certain time. As the problem states that every hour x percent of caffeine leaves the body, we must substract that percentage from the initial quantity of caffeine, by each hour passing. That expression would be:

$A= C_{0}(1-x)^t\\t: time \ in \ hours\\x: percentage \ of \ caffeine\ metabolized\\$

Then, to find the amount of caffeine metabolized per hour, we need to differentiate the previous equation. Following the differentiation rules we get:

$\frac{dA}{dt} =C_{0}(1-x)^t \ln (1-x)\\\frac{dA}{dt} =100*0.88\ln(0.88)\\\frac{dA}{dt} =-11.25 \frac{mg}{h}$

The rate is negative as it represents the amount of caffeine leaving the body at certain time.

3 0

3 years ago