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a_sh-v [17]
3 years ago
7

what is the expression, equation, or inequality using x as your variable: The product of a number and its opposite, increased by

seven
Mathematics
1 answer:
olchik [2.2K]3 years ago
7 0
x\cdot (-x)+7
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Diana purchases 6 pounds of strawberries and 4 pounds of apples for 18.90. Then she realized that this was not enough and purcha
Veronika [31]
<span>6 pounds of strawberries for x pounds and 4 pounds of apples for y pounds. = $18.90.
6x + 4y = 18.90
Then, you add 3 more pounds of each fruit which equals $10.17. 
3x + 3y = 10.17
Then you multiply by -2 which is (-6x) - 6y = -20.34. After that, you add that (read carefully) you would do this. (-6x) + 6x - 6y + 4y = -20.34 + 28.90.
-2y = -1.44 divided by -2.
Y = -1.44/-2
Y = $0.72 per pound of apples.</span><span>Now, plus in the value of Y in equation 2.
3x + 3y = 10.17
3x + 3 * 0.72 = 10.17.
3x + 2.16 = 10.17
-2.16
3x = 10.17 - 2.16
3x = 8.06 /3

Int total, X = $2.68 per pound of strawberry. Hope this helps just read it carefully. </span>
4 0
3 years ago
An earthquake waves travels through 55 km of rock in 25 seconds. What is the constant of proportionality that represents shows t
trasher [3.6K]

Answer:

d = (max distance / max time)t + 0.

Step-by-step explanation:

Earthquake travels 55km of rock in 25 seconds, the relationship between d, the distance traveled in km, and t, the time elapsed in seconds is:

d = (max distance / max time)t + 0

d = (55 km / 25 sec) * t

  = 2.2t

4 0
3 years ago
Read 2 more answers
3x - 14 + 2(x-9) = 2x - 2
Papessa [141]

Answer:x=10

Step-by-step explanation:

6 0
3 years ago
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The y-intercept of the line whose equation is 7x-4=8 is A) 7/4 B) 8 C) -2
sweet [91]
7x-4=8 simplifies to x = 12/7

this is a vertical line thru ,(0, 12/7,) and as such it has no y intercept. look to see if you copied it down right.
4 0
4 years ago
Please help me ASAP thanks please I really need this I’ll appreciate it so much
Licemer1 [7]

Answer:

2

Step-by-step explanation:

5 0
3 years ago
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