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3 years ago

What does the equation x+4=9

Mathematics

2 answers:

alexgriva [62]3 years ago

6 0

Answer:

Step-by-step explanation:

x + 4 = 9

Subtract 4 from both sides of the equation since 4 and 9 are like terms.

x + 4 = 9

- 4 -4

This will leave you with x = 5.

Marat540 [252]3 years ago

4 0

Answer:

<h2>You have to isolate x to find the answer. To do this you take your equation and multiply both sides of your equation by negative four. x−4=9 then becomes x−4×−4=9×−4 . As a final result you obtain x=−36</h2>

Step-by-step explanation:

You might be interested in

In a certain deck of cards, each card has a positive integer written on it. In a multiplication game, a child draws a card and m

ASHA 777 [7]

Answer:

4 and 13

Step-by-step explanation:

You want integer solutions to ...

15 ≤ n(n+1) ≤ 200

If we let the limits be represented by "a", then the equality is represented by ...

n² +n -a = 0

(n² +n +1/4) -a -1/4 = 0

(n +1/2)^2 = (a +1/4)

n = -1/2 + √(a +1/4)

For a=15, we have

n ≥ -1/2 + √15.25 ≈ 3.4 . . . . . minimum n is 4

For a=200, we have

n ≤ -1/2 + √200.25 ≈ 13.7 . . . maximum n is 13

The least and greatest integers on the cards are 4 and 13.

8 0

3 years ago

If two opposite sides of a square are increased by 5 meters and the other sides are decreased by 2 meters, the area of the recta

stira [4]

Let the original length of the square be x cm.
(x+5) X (x-2) = 60
Or, x^2-2x+5x-10-60 = 0
Or, x^2+3x-70=0
Or, x^2+10x-7x-70=0
Or, x(x+10)-7(x+10)=0
Or, (x-7)(x+10)=0
Therefore, x=7 or x=-10 (rejected as the length cannot be negative)
Ans: Area of the square=l^2=7^2=49 square meters.

4 0

3 years ago

Suppose 300 nursing students took a certification test that is worth 100 points.

Alja [10]

Answer:

225 students scored 65 or better and 75 students scored 88 or better.

Step-by-step explanation:

We are given that The five-number summary for the scores of 300 nursing students are given :

Minimum = 40

$Q_1 = 65$

Median = 82

$Q_3 = 88$

Maximum = 100

$Q_1$ is the first quartile and is the median of the lower half of the data set. 25% of the numbers in the data set lie below $Q_1$ and about 75% lie above $Q_1$ .

$Q_3$ is the third quartile and is the median of the upper half of the data set. 75% of the numbers in the data set lie below $Q_3$ and about 25% lie above $Q_3$

i) .About how many students scored 65 or better?

$Q_1 = 65$

Since we know that 75% lie above $Q_1$ .

So, Number of students scored 65 or better = $75\% \times 300 = \frac{75}{100} \times 300 =225$

ii)About how many students scored 88 or better?

$Q_3 = 88$

Since we know that 25% lie above $Q_3$

So, Number of students scored 88 or better = $25\% \times 300 = \frac{25}{100} \times 300 =75$

Hence 225 students scored 65 or better and 75 students scored 88 or better.

7 0

4 years ago

A drill team is raising money by holding a car wash. The team earns $6.00 for each car washed. The team's expenses include $50.0

Oksi-84 [34.3K]

The function p(x) is obtained by subtracting g(x) from f(x)

The rule of p(x) is p(x) = 5.5 x - 50

Step-by-step explanation:

A drill team is raising money by holding a car wash

The team earns $6.00 for each car washed
The team's expenses include $50.00 for advertising plus $0.50 in materials for each car washed
f(x) represent the team's total earning for washing x cars
g(x) represent the team's total expenses for washing x cars
p(x) that gives the team's profit for washing x cars

We need to describe how can you use f(x) and g(x) to obtain a function p(x) that gives the team's profit for washing x cars, and then write a rule for p(x)

∵ The team earns $6.00 for each car washed

∵ f(x) represent the team's total earning for washing x cars

- Equate f(x) by the product of x and 6

∴ f(x) = 6 x

∵ The team's expenses include $50.00 for advertising plus $0.50

in materials for each car washed

∵ g(x) represent the team's total expenses for washing x cars

- Equate g(x) by the sum of 50 and the product of 0.5 and x

∴ g(x) = 50 + 0.5 x

The profit = total earning - total expenses

∵ f(x) is the total earning for washing x cars

∵ g(x) is the total expenses for washing x cars

∵ p(x) represents the team's profit for washing x cars

- Subtract g(x) from f(x) and equate the difference by p(x)

∴ p(x) = f(x) - g(x)

The function p(x) is obtained by subtracting g(x) from f(x)

∵ f(x) = 6 x

∵ g(x) = 50 + 0.5 x

∴ p(x) = 6 x - (50 + 0.5 x)

- Simplify the right hand side

∴ p(x) = 6 x - 50 - 0.5 x

- Add the like term

∴ p(x) = 5.5 x - 50

The rule of p(x) is p(x) = 5.5 x - 50

Learn more:

You can learn more about the linear function in brainly.com/question/12363217

#LearnwithBrainly

4 0

4 years ago

Geometry help!!<br><br> I need help on #13, find the values of the variables:

ivanzaharov [21]

T and W would both equal 60

3 0

3 years ago

Read 2 more answers