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blagie [28]
3 years ago
8

Feb 05, 3:07:40 PM

Mathematics
1 answer:
zaharov [31]3 years ago
7 0
Solve (2x - 1)(3x^2 - 9x - 4)
=

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What number should be added to both sides of the equation to complete the square?<br> x2 - 6x = 5
Ymorist [56]

Answer:

9

Step-by-step explanation:

Given

x² - 6x = 5

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 3)x + 9 = 5 + 9, that is

(x - 3)² = 14

4 0
3 years ago
Read 2 more answers
A tree 8m tall costs a shadow 10m long.How tall is the tree on the same ground level that costs a shadow 40m long at the same ti
andreev551 [17]

Answer:

32m tall

Step-by-step explanation:

10m=8m

40m=x

x=8*40/10

x=32 m

3 0
3 years ago
A triangle in the xy-coordinate plane is formed by the points (3, 5), (− 1, 5) , and (3,− 6) . What is the perimeter and area of
kati45 [8]

Answer:

Therefore, the perimeter of the triangle is 26.7 units and the area is 22 square units.

Step-by-step explanation:

Given the vertices of a triangle as: A(3, 5), B(− 1, 5), and C(3,− 6)

Since A and B are on the same y-coordinate, we have that:

AB = 3-(-1)=4 Units

Since A and C are on the same x-coordinate, we have that:

AC=5-(-6)=11 Units

Next, we determine the distance BC using the distance formula.

Given: B(− 1, 5), and C(3,− 6)

BC=\sqrt{(3-(-1))^2+(-6-5)^2}\\= \sqrt{(4)^2+(-11)^2}=\sqrt{137}$ Units

Therefore:

Perimeter of the Triangle

= 4+11+\sqrt{137}\\ =15+\sqrt{137}$ Units\\=26.7 Units

On plotting the triangle, it forms a right triangle such that the:

Base = 4 Units

Height = 11 Units

Therefore:

Area of a triangle =\dfrac12 *Base*Height

Therefore:

Area of the Triangle = 0.5 X 4 X 11

=22 Square Units.

Therefore, the perimeter of the triangle is 26.7 units and the area is 22 square units.

5 0
3 years ago
PLZ help me
maxonik [38]

Answer:

B, C, D, and F

Step-by-step explanation:

The graph is an exponential curve rising upwards. By looking at the graph we can tell that the graph is only increasing, it touches the y-axis at 30 and it lies in the 1st quadrant.

So, option A is wrong, as the graph is increasing.

Option B is correct. The point where graph crosses/touches the y-axis is the y-intercept. So the y-intercept is 30.

Option C is correct. As the graph lies in 1st quadrant and is positive over the entire range of values.

Option D is also correct as the graph is increasing over entire range of values.

Option E is incorrect as y-intercept is 30.

Option F is correct. Since the graph is increasing, this means with every passing year the number of dolphins is increasing.

Therefore, the correct options are: B, C, D, and F

5 0
3 years ago
(-19, -13), (11, -3)
Mashutka [201]

Answer:

Your answer is -256

Step-by-step explanation:

8 0
3 years ago
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