Answer:
The positive difference between the a values is 0.5
Step-by-step explanation:
we know that
Both parabolas cross the x axis at (-4,0) and (6,0)
so
The general equation is
<em>Find the value of a in the first parabola</em>
The y-intercept is (0,-12)
so
For 
substitute
<em>Find the value of a in the second parabola</em>
The y-intercept is (0,-24)
so
For 
substitute
<em>Find the positive difference between the a values for the two functions</em>
so
Answer:
9. 3.93miles
10. 7.42 cm
11. He doesn't have enough money to buy a hat.
12. $10.02
Step-by-step explanation:
9. ⇒
Yesterday walked=1.74 miles
Today walked=2.19 miles
Total walked both days=(1.74+2.19)=3.93miles
10.⇒
Total growth in a month was (12.72-5.3)=7.42 cm
11.⇒
After buying foods, Daniel has (20.39-8.76)=$11.63
The hat is $12
As, 11.63<12 (11.63 is less than 12)
So, he doesn't have enough money to buy a hat.
12.⇒
Penny has $35
Buying a hat and a scarf, Penny has spent (14.99+9.99)=$24.98
Now, Penny will have (35-24.98)=$10.02
Hope, this helps you.
<span>4x + 3y = 16
7x + 6y = 31
Note what happens if we mult. the first eqn. by -2:
-8x - 6y = -32
Combining this with the 2nd equation eliminates the variable y:
</span>-8x - 6y = -32<span>
7x + 6y = 31
--------------------
-x = -1, or x = 1. Sub 1 for x in either of the 2 given eqns to find y:
For example: 4(1) + 3y = 16, so 36 = 12, and y = 3. Sol'n is (1,3).</span>
I do not know because I am 8 years old sorry
Answer: D
Step-by-step explanation: for A the answer would be 80 but she spends more. For b & c i just worked out those so I was left with D. 50% of 800 is 400 and if you add up the cell phone and car payment you get 400
Hope this helps!
