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Vladimir79 [104]
3 years ago
14

Please help! 5/20, will give brainliest. I do not tolerate spam answers!

Mathematics
2 answers:
Angelina_Jolie [31]3 years ago
4 0

Answer:

9(x - 3)(x + 3)

Step-by-step explanation:

Given

9x² - 81 ← factor out 9 from each term

= 9(x² - 9) ← x² - 9 is a difference of squares

= 9(x - 3)(x + 3) ← in factored form

notka56 [123]3 years ago
3 0

This one can be factored.

9x^2-81=9(x^2-9)

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Sal's Sandwich Shop sells wraps and sandwiches as part of its lunch specials. The profit on every sandwich is $2, and the profit
Mademuasel [1]

<u>Answer:</u>

y = -\frac{2}{3}x + 490

gradient = = -\frac{2}{3}

y-intercept = 490

<u>Step-by-step explanation:</u>

• The slope-intercept form of an equation takes the general form:

\boxed{y = mx + c},

where:

m = slope,

c = y-intercept.

• We are given the equation:

2x + 3y = 1470

To change this into the slope-intercept form, we must make y the subject:

3y = -2x + 1470          [subtract 2x from both sides]

⇒ y = -\frac{2}{3}x + \frac{1479}{3}        [divide both sides by 3]

⇒ y = -\frac{2}{3}x + 490

• Comparing this equation with the general form equation, we see that:

m = -\frac{2}{3}

c = 490.

This means that the gradient is \bf -\frac{2}{3}, and the y-intercept is \bf 490.

6 0
2 years ago
A die is a cube with 1 edgemeasuring 0.62 inches. Find the total volume of the 5 dice in agame.
igomit [66]

The volume of one die is the edge to the power of 3:

V=0.62^3in^{3^{}}.

The total volume is five times the above volume:

5V=1.19164in^3.

Answer:

1.19164in^3

5 0
1 year ago
The perimeter of a square field is the same as that of a rectangular field. If the length of the rectangular field is 8 km and w
Bess [88]

Answer:

42.25cm^2

Step-by-step explanation:

8+5+8+5 = 26

26/4 = 6.5

6.5x6.5 = 42.25

4 0
3 years ago
Read 2 more answers
Choose the graph of the linear equation 30x+75y=300
vivado [14]

Answer:

there ya go :)

4 0
2 years ago
In triangle STU, u2 = s2 + t2. Triangle STU has sides s, t, u opposite to the corresponding vertices S, T, U Which equation is t
wlad13 [49]
Answer:
<span>The measure of angle SUT is equal to 90 degrees
</span>
Explanation:
The Pythagorean theorem states that:
"In any right-angled triangle, the square of the hypotenuse is equal to the sum of squares of the other two sides"
In other words:
(hypotenuse)² = (first side)² + (second side)²

Now, for the given, we have:
u² = s² + t²
This means that the given triangle UST is a right-angled triangle and that side "u" is its hypotenuse.

According to the given, the angle opposite to side "u" is angle U. This means that angle U is the right-angle in this triangle.

Based on the above:
angle U = 90°
angle S + angle T = 180 - 90 = 90°

Now, comparing our deductions to the given choices, we can conclude that the correct choice is:
The measure of angle SUT is equal to 90 degrees

Hope this helps :)
6 0
3 years ago
Read 2 more answers
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