Answer:
Hi there!
Your answers are:
a) x= 10
b) x= 4
c) x= 2
Step-by-step explanation:
a) 5+2x=25
-5
2x= 20
/2
x= 10
<u>Plug back in!</u>
5+2(10)= 25
5+20=25
25=25✓✓✓
b) 14= 5x-6
+6
5x= 20
/5
x= 4
14= 5(4)-6
14= 20-6
14=14✓✓✓
c) 15= 4x+7
-7
8= 4x
/4
2=x
15= 4(2)+7
15= 8+7
15= 15✓✓✓
Hope this helps!
Answer:
x-=45
Step-by-step explanation:
-30= -4/5x + 6
-36= -4/5x
-180 = -4x
x=45
Step-by-step explanation:
thr standard form for a quadratic equation is:
ax²+bx+c
in this example, a=1, b=(-1), c=(-42)
Answer: The basketball will sell for $21
.
Step-by-step explanation:
Hi, to answer this question, first, we have to multiply the cost of the basketball (10) by the percent markup in decimal form (divided by 100).
Mathematically speaking:
10 x (110/100) = $11
Now, we have to add the markup amount (11) to the cost (10) to obtain the selling price:
10 +11 = $21
The basketball will sell for $21
.
Once it is rearranged it would be inverse.
y = k/x is the inverse variation equation.
y = 0.3/x
0.3 is the constant of variation