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2 years ago

If brad is x years old and Julie is five years younger than brad how old is Julie

Mathematics

1 answer:

zlopas [31]2 years ago

4 0

Using algebraic expression, we can state that Julie is (x - 5) years old.

<h3>How to Express a Word Problem in Algebraic Expressions?</h3>

Algebraic expressions can be defined as a mathematical expression which helps to simplify a given statement or word problem. Variables, operation sign, and numbers are used.

Given the following:

The age of brad is x years old

We are told that Julie is five (5) years younger than brad. This means that Julie's age is 5 less than the age of Brad. This can be expressed in algebraic expression as:

x - 5

Therefore, we can state that Julie is (x - 5) years old.

Learn more about algebraic expression on:

brainly.com/question/12470265

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HELP PLZ 30 POINTS UwU

polet [3.4K]

Angle 1 = 130°

Angle 2 = 124°

Angle 3 = 56°

Angle 4 = 52°

Angle 5 = 72°

Angle 6 = 94°

I primarily used the triangles to get my answers. Remember the angles in a triangle add up to 180°.

3 0

3 years ago

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A pan of warm water (46∘ Celsius) was put in a refrigerator. After 15 minutes, the water's temperature was 27∘ C; 15 minutes aft

Cloud [144]

Answer:

The refrigerator was at around 13 ∘C

Step-by-step explanation:

Newton's Law of Cooling:

The rate of change of a body temperature (amount of heat loss/time of loss) is directly proportional to the difference between its own temperature and the surroundings.

$\frac{T(t2)-T(t1)}{t2-t1} = -h (T(t2) - Tenv)$

T ⇒ temperature

t ⇒ time

Tenv ⇒refrigerator temperature

$\frac{T(t2)-T(t1)}{t2-t1}$ ⇒ rate of change of he temperature

-h ⇒ constant of proportionality (negative because the temperature is decreasing inside the refrigerator)

We have 3 points:

time (minutes) - Temperature (∘ C)

0 (when the pan was put in the refrigerator) - 46

15 (after 15 minutes) - 27

30 (15 minutes after the first 15 minutes) - 19

$\frac{27 - 46}{15 - 0}$ = -h (27 - Tenv)

$\frac{19 - 27}{15 - 0}$ = -h (19 - Tenv)

Now we have a system of two equations and two variables

$\frac{-19}{15} = -h (27 - Tenv)\\ \frac{19}{15} = h (27 - Tenv)\\ \frac{19}{15(27 - Tenv)} = h$

$\frac{19 - 27}{15 - 0} = -h (19 - Tenv)\\\frac{-8}{15} = -h (19 - Tenv)\\\frac{8}{15} = h (19 - Tenv)\\\frac{8}{15} = \frac{19}{15(27 - Tenv)} (19 - Tenv)\\8(27 - Tenv) = 19 (19 - Tenv)\\216 - 8 Tenv = 361 - 19 Tenv\\19 Tenv - 8 Tenv = 361 - 216\\11 Tenv = 145 \\Tenv = 145/ 11\\Tenv = 13. 18$

The refrigerator was at around 13 ∘C

6 0

3 years ago

The floor of Cara's living room is 10 feet by 14 feet. What is the area, in square feet, of the largest circular rug that can fi

Rus_ich [418]

Answer:

$78.5\ ft^{2}$

Step-by-step explanation:

we know that

If the floor of Cara's living room is 10 feet by 14 feet

then

the diameter of the larger circular rug that can fit in Cara's living room is equal to 10 feet

<em>Find the area of the circular rug</em>

The area of the circle is equal to

$A=\pi r^{2}$

we have

$r=10/2=5\ ft$ ----> the radius is half the diameter

$\pi=3.14$

substitute the values

$A=(3.14)(5)^{2}=78.5\ ft^{2}$

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3 years ago

How long can a cat live ?

PSYCHO15rus [73]

Step-by-step explanation:

I think 10-15years

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2 years ago

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There are 12 girls and 18 boys in a class. Teacher wants to form groups with the same

Stells [14]

Answer:

6 groups

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Step-by-step explanation:

To find the answer, first find the Greatest Common Factor or the GCF. The GCF in this case is 6. So, the amount of groups is 6. Then divide each number by 6, so there will be 2 girls in each group and 3 boys in each group.

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3 years ago