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3 years ago

Mr. Gilliam is 3 years younger than his wife. The sum of their ages is 95. How old is Mr Gilliam?

Mathematics

2 answers:

Elina [12.6K]3 years ago

6 0

Answer: spaced it out to make it more clear lol ‍♀️

Step-by-step explanation:

Explanation:

Let's make Mr Gilliam's age

and his wife's age

From your question, we can understand that

is 3 less than

In equation form, this can be written as:

−

So far so clear?

Next, we know that the sum of

and

is 95.

In equation form, this will be written as:

Now, here's the trick. You need a change in perspective.

We know that

and

, right?

Therefore,

can also be written as

(

)

Does that make sense?

If it does, then the equation will become:

(because you had two

After shifting the numbers around a little as below, you will arrive at the answer:

−

Therefore, Mr. Gilliam is 46 years old. I hope this helps!

Luba_88 [7]3 years ago

3 0

Answer:

Mr. Gilliam is 49 years old

Step-by-step explanation:

Let Ms. Gilliam = w

Let Mr. Gilliam = w + 3

w + w + 3 =95

2w +3 =95

2w = 95 -3

2w = 92

w = 92/2

w = 46

Mr. Gilliam = 46 + 3

Mr. Gilliam is 49 years old

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What is the greatest perimeter of a rectangle with an area of 39 ft.²

Ulleksa [173]

The area is 39*1=39, and the perimeter would be 39+39+1+1=80. !

3 0

3 years ago

-3=k+3 How do I solve this and can u leave instructions so I can understand what u did

Tamiku [17]

Answer:

k = 6

Step-by-step explanation:

-3=k+3

1) you must isolate the variable (k)

2) subtract each side by 3, to get k=-6

> -3-3=k+3-3

-6=k

now your variable is isolated, so you have your answer.

7 0

4 years ago

Lisa buys a television for $4185. if the sales tax is $292.95. what percent is sales tax?

Romashka-Z-Leto [24]

Answer:

Sales tax = 7%.

Step-by-step explanation:

Let x be the percent of sales tax.

We have been given that Lisa buys a television for $4185. The sales tax is $292.95.

We need to figure out x such that x percent of 4185 equals to 292.95. Let us represent this information in an equation.

$\frac{x}{100}*4185=292.95$

Let us multiply both sides of equation by 100.

$100*\frac{x}{100}*4185=100*292.95$

$x*4185=29295$

$x=\frac{29295}{4185}$

$x=7$

Therefore, sales tax is 7%.

Let us cross check our answer by calculating 7% of 4185.

$7\%\text{ of } 4185=\frac{7}{100}\times 4185$

$7\%\text{ of } 4185=0.07\times 4185$

$7\%\text{ of } 4185=292.95$

We can see that 7% of 4185 is 292.95. Hence, sales tax is 7%.

5 0

3 years ago

Help!!! I will mark the person who answers with an actual answer brainliest Due soon

Gwar [14]

Answer:

Im not entirely sure but i think that either a or d is correct

Step-by-step explanation:

hope this helps!

3 0

3 years ago

Read 2 more answers

4. IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. In a

borishaifa [10]

675 people will have score between 85 and 120

Step-by-step explanation:

Given

Mean = 100

SD = 15

If we have to find percentage of score between two values we have to find the z-score for both values and then area under the curve for both values

z-score is given by:

for a value x:

$z-score = \frac{x-mean}{SD}$

So,

For 85:

$z-score = z_1 = \frac{85-mean}{SD}\\ = \frac{85-100}{15}\\=\frac{-15}{15}\\=-1$

$z-score = z_2 = \frac{120-mean}{SD}\\ = \frac{120-100}{15}\\=\frac{20}{15}\\=1.3333$

Now we have to find the area under the curve for both values of z-score. z-score tables are used for this purpose.

So,

For z1 : 0.1587

For z2: 0.9082

The area between z11 and z2:

$z_2-z_1 = 0.9082-0.1587=0.7495$

So the probability of score between 85 and 120 is 0.7495

As the sample is of 900 people, the people with scores between 85 and 120 will be:

900*0.7495 = 674.55 people

Rounding off to nearest whole number

675 people will have score between 85 and 120

Keywords: Probability, SD

Learn more about probability at:

#LearnwithBrainly

4 0

4 years ago