All categories

3 years ago

Simplify the expression. 3x-9y-5x-7y

Mathematics

2 answers:

Norma-Jean [14]3 years ago

7 0

$3x - 9y - 5x - 7y =\ \textgreater \ \\ 

( 3x + - 5x ) +( - 9y + - 7y ) =
 \\ \\ = - 2x - 16y 
 \\ \\ 
Good Luck$

emmasim [6.3K]3 years ago

5 0

3x - 9y - 5x - 7y

Combine like terms

( 3x + - 5x ) + ( - 9y + - 7y )

= - 2x - 16y

You might be interested in

Camille uses a 20% off coupon when buying a sweater that costs $47.99. If she also pays 6% sales tax on the purchase, how much d

dezoksy [38]

First calculate what the coupon does for Camille
so multiply %20 by the cost or .2(47.99)=9.598 which rounds to 9.60 meaning she still paid $38.39
Then calculate sales tax by multiplying her clearance price by %6 and adding it on the cost
.06(38.39)= 2.3034 which rounds to $2.30 in tax.
Add that onto the clearance price 38.39+2.30=$40.69
So her total cost was $40.69

3 0

3 years ago

Read 2 more answers

The sum of the measures of angles for a triangle is 180°. Find the value of x and then the measures of the 3 angles

dmitriy555 [2]

Answer:

The value of x is 50

The measures of the 3 angles are 50°, 100°, 30°

Step-by-step explanation:

Let us solve the question

∵ The sum of the measures of the angles of a triangle is 180°

∵ The measures of the 3 angles of the given Δ are x°, 2x°, (x - 20)°

→ Add them and equate the sum by 180

∴ x° + 2x° + (x - 20)° = 180°

→ Add the like terms

∵ (x + 2x + x) + (-20) = 180

∴ 4x - 20 = 180

→ Add 20 to both sides

∵ 4x - 20 + 20 = 180 + 20

∴ 4x = 200

→ Divide both sides by 4 to find x

∴ x = 50

∴ The value of x is 50

To find the measures of the 3 angles substitute x by 50 in their expressions

∵ The measure of one angle is x

∴ The measure of the 1st angle is 50°

∵ The measure of the 2nd angle is 2x

∴ The measure of the 2nd angle = 2(50)

∴ The measure of the 2nd angle is 100°

∵ The measure of the 3rd angle is (x - 20)

∴ The measure of the 3rd angle = (50 - 20)

∴ The measure of the 3rd angle is 30°

∴ The measures of the 3 angles are 50°, 100°, 30°

6 0

3 years ago

Help please and thank u

elena55 [62]

Answer:

It’s correct

Step-by-step explanation:

You‘ve got the first angle correct! You‘ve got the second angle correct. The third angle is also correct! angle.

Now the third angle has a way of Tricken ya! So heres a way to solve:

5 x 20= 100

100-40= 60

GOOD JOB! have a good night!

3 0

3 years ago

What is the solution set to the inequality 5(x - 2)(x + 4) > 0?

Butoxors [25]

Answer:

You selected the correct answer: {x | x <<em> </em>-4 or x > 2}

Step-by-step explanation:

5(x - 2)(x + 4) > 0

Use FOIL method to expand (x - 2)(x + 4):

$5(x^{2} + 2x - 8)$ > 0

Distribute 5 into $(x^{2} + 2x - 8)$

$5x^{2} + 10x - 40$ > 0

Divide all terms by 5 from both sides of the inequality:

$\frac{5x^{2}}{5} + \frac{10x}{5} - \frac{40}{5} > \frac{0}{5}$

$x^{2} + 2x - 8 > 0$

Factor the trinomial:

(x + 4) ( x - 2) > 0

x < -4 or x > -2

Therefore, the solution set to the inequality is {x | x < -4 or x > 2}

<em>Interval notation: </em>(-∞, -4) ∪ (2, ∞)

8 0

2 years ago

Plzz help, Find the volume of the figure

mezya [45]

Answer:

The answer is 896,000

Step-by-step explanation:

Just multiply all the numbers

6 0

3 years ago

Read 2 more answers