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Contact [7]
3 years ago
7

Which represents the solution set to the inequality 5.1(3 + 2.2x) > –14.25 – 6(1.7x + 4)?

Mathematics
1 answer:
Ymorist [56]3 years ago
4 0

Answer:

the answer is the second number line

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David bought 3 dvds and 4 books for $40 at a yard sale. Anna bought 1 dvd and 6 books for $18. How much did each dvd and book co
Ber [7]

Answer:

A book is worth $1 and a DVD is worth $12.

Step-by-step explanation:

The equations (2 unknowns and two equations, d is for a DVD and b is for a book):

For David: 3d+4b=40

For Anna: d+6b=18

Now multiply the second equation with -3 and add to the first equation:

3d+4b=40

−3d−18b=−54

Combined equation: −14b=−14 and b=1 (means that each book is worth $1).

 

Now for DVD price, use the second equation:

d=18−6 or d=12 (means that each DVD  is worth $12).

A book is worth $1 and a DVD is worth $12.

8 0
3 years ago
What additional information is needed to prove the triangles are congruent by the SAS Postulate?
Kitty [74]
You need to know the length of two sides and the degree of one angle.
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Identify two composite numbers that each have 8 as a factor.
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Two composite numbers that have 8 as a factor are 16 and 24.
7 0
3 years ago
Can some please help me do this? Thanks
madreJ [45]
Slope intercept form is y=MX+b.
M is the slope, x is the x intercept, and b is the y intercept

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3 years ago
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A distance of 150 km was covered by a motorcyclist traveling at an average speed of 75 km/h, by a bus at 60 km/h, a truck at 50
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Motorcyclist: 2 hours
Bus: 2.5 hours
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