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3 years ago

Write a real world problem that could be solved by using the equation 3x-25= 125. Then solve the equation

Mathematics

2 answers:

LiRa [457]3 years ago

4 0

Answer:

There can be many example for this equation like:

1. There are three friends and all have the same amount of money. Together they give $25 in a restaurant and they are left with $125. How much money did each have?

We can solve this like:

Let each friend had 'x' money so three friends had 3x money.

They gave out $25, means 3x-25 and are left with $125.

So, complete equation becomes :

$3x-25=125$

Solving for x we get;

$3x=125+25$

$3x=150$

x = 50

So, each friend had $50.

Inessa [10]3 years ago

3 0

I honestly don't know what you're talking about.

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At what point(s) does the parabola,

rjkz [21]

Answer:

Please check the formatting when posting. I'm assuming these are the equations:

y=x^2 - 2

y=−x

Step-by-step explanation:

We can either graph the equations or solve them. I use graphing - see the attachment. The lines intersect at (-2, 2) and (1,-1)

<u>1. Graphing</u>

See attached graph

(-2, 2) and (1,-1) are the intersection points

<u>2. Solving</u>

y=x^2 - 2 Use y=−x in this equation:

-x = x^2 - 2

0 = x^2 + x - 2

0 = (x+2)(x-1)

x = -2 and +1

(-2, 2) and (1,-1) are the intersection points

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2 years ago

Problem Ishaan is 2 times as old as Christopher. 35 years ago, Ishaan was 7 times as old as Christopher. How old is Ishaan now?

bekas [8.4K]

According to my math, he would be 90 years old

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3 years ago

Read 2 more answers

Algebra 2 Math question Grade 11

Paha777 [63]

Answer:

$\displaystyle y=\frac{4}{5}x+\frac{13}{5}$

Step-by-step explanation:

The equation of the line in slope-intercept form is:

y=mx+b

Where m the slope of the line and b the y-intercept.

When two points are given, it's convenient to calculate the slope first.

Suppose we know the line passes through points A(x1,y1) and B(x2,y2). The slope can be calculated with the equation:

$\displaystyle m=\frac{y_2-y_1}{x_2-x_1}$

The points are (3,5) and (-2,1):

$\displaystyle m=\frac{1-5}{-2-3}=\frac{4}{5}$

The equation is now:

$\displaystyle y=\frac{4}{5}x+b$

To calculate b, we use any of the given points and solve for b. Use (3,5):

$\displaystyle 5=\frac{4}{5}3+b$

Operate:

$\displaystyle 5=\frac{12}{5}+b$

Solve:

$\displaystyle b=5-\frac{12}{5}=\frac{13}{5}$

The required equation of the line is:

$\boxed{\displaystyle y=\frac{4}{5}x+\frac{13}{5}}$

3 0

4 years ago

The frog population at a lake doubles every week. The population can be modeled by f(x) = 15(2)x and f(6) = 960. What does the 9

insens350 [35]

Answer:

a is the correct option.

Step-by-step explanation:

We have been given the population model is $f(x)=15(2)^x, f(6)=960$

Here x represents number of weeks and f(x) is population of frog after x weeks.

For x= 6, we have

$f(6)=15(2)^6\\\\f(6)=15\times 64\\f(6)=960$

It means that the population after 6 weeks is 960.

Hence, f(6)=960 represents the population after 6 weeks.

a is the correct option.

6 0

4 years ago

What is the answer answer and plz give me step by step explaining

Tamiku [17]

Answer:

x = 5

Step-by-step explanation:

6 + 8(x - 1) = 2(3x + 4)

We evaluate the numbers in the brackets first.

(8 × x = 8x, 8 × 1 = 8, 2 × 3x = 6x, 2 × 4 = 8)

6 + 8x - 8 = 6x + 8

The left hand side of the equation is not exactly simplified, so we will evaluate it further first.

(6 - 8 = -2)

8x - 2 = 6x + 8

Now we can start shifting the x and the numbers separately.

Note that when pushing 6x from the right side to the left side, it needs to change to a negative 6x and vice versa for -2 turning into +2.

8x - 6x = 8 + 2

Further evaluation

2x = 10

Now we can simply find x.

Note that for this, ×2 becomes ÷2 when it shifts from the left side to the right side of the equation.

x = 10 ÷ 2

Evaluate.

x = 5

3 0

3 years ago