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Alexus [3.1K]
3 years ago
12

Simplify 3(x + 2) + 4(x - 5) 7x - 3 7x + 26 7x - 14

Mathematics
2 answers:
Molodets [167]3 years ago
7 0

Answer:

Step-by-step explanation:

2(13x – 7). 11.

Ira Lisetskai [31]3 years ago
5 0

Answer:

Step-by-step explanation:

3(x + 2) + 4(x - 5)

Opening brackets

= 3x + 6 + 4x - 20

= 3x + 4x + 6 - 20

= 7x - 14

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The table to the right shows selected ages of licensed drivers in one country and the corresponding percentiles. Find the percen
PolarNik [594]

Answer:

66%

Step-by-step explanation:

Given :

Age          Percentile

75           97

65           90

55           78

45           58

35           37

25           13

20           66

To Find :The percentage of drivers who are younger than 20 is _____%.

Solution:

Refer the given table

The percentile corresponding to age 20 is 66.

Percentile : A data item is said to be in nth percentile of distribution if n% of the distribution are less than that particular data item.

So, drivers who are younger than 20 are said to be in 66 percentile if 66%of the distribution are less than that particular data item.

Hence The percentage of drivers who are younger than 20 is 66%.

7 0
3 years ago
Read 2 more answers
Graph f(x) =-2x^+16x-30 by factoring to find the solutions, then find the coordinates of the vertex, and the axis of symmetry. I
inn [45]

Answer:

See explanation

Step-by-step explanation:

1. Factor the function f(x)=-2x^2+16x-30:

f(x)=-2x^2+16x-30=-2x^2+6x+10x-30=-2x(x-3)+10(x-3)=-2(x-3)(x-5).

2. The zeros (or the solutions of the equation f(x)=0) are x=3 and x=5. So? points (3,0) and (5,0) are the points on the graph that are the solutions of the equation.

3. Find the vertex:

x_v=-\dfrac{b}{2a}=-\dfrac{16}{2\cdot (-2)}=4,\\ \\y_v=-2\cdot 4^2+16\cdot 4-30=-32+64-30=2.

Thus, the coordinates of the vertex are (4,2) and the axis of symmetry is the vertical line that passes trough the vertex: x=4.

3 0
2 years ago
Which set of directions correctly describes how to plot the point (6, 2) on the coordinate plane?
o-na [289]

(6;2)

6 - x coordinate, 2 - y coordinate.

6 > 0, then we need to move right 6 points. 2 > 0, than we need to move up 2 points

Answer: Start at the origin. Move 6 units to the right, then move 2 units up.

6 0
3 years ago
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You purchased a shirt on sale for $17.55. The discount on the shirt was $5.85. What was the original price of the shirt?
Svetlanka [38]
To find the original price, add the discount back onto the sales price.
17.55+5.85= 23.4
So your answer would be $23.40. Hope this helps!
7 0
3 years ago
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Write the expression in simplest form (-11/2x+3)-2(-11/4x-5/2)
Alex_Xolod [135]

This expression would equal to 8.

3 0
3 years ago
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