Answer:
1) if he wants to do that he needs 0.6 gallons x 14 days = 8,4 gallons.
If the car starts with 14 gallons then he is able to ride 14 days without the warning light.
2) now he would need 0.6 gallons x 25 days = 15 gallons.
he only has 14 gallons so that is not possible.
3) no clue sorry
4) x= the days he can drive without the warning light
14-1,5 = 0,6.x
<=>12,5= 0,6.x
<=>20,833... = x
He can go 20 days without the warning light.
5) x= the days he can drive his car without seeing the warning light.
x.0,6<12,5
<=> x<20,833...
If he drives 20,833... days he will see the warning light so everything before that he won't see it.
Hello,
a,b,c are the sides.
1) first idea
Theorem of Al' Kashi (genralized pythagorean theorem) will help us
a²=b²+c²-2bc cosA ==>49=49+25-2*7*5*cos A
==>cos A=25/70=5/14 ==>
A=69,075167572361683699967605141899 °≈69°
b²=a²+c²-2ac cos B ==> 49=49+25-2*7*5 * cos B==>cos B=5/14
B=A (triangle is isocele ==> a second method)
C=180-2*69=42°
II)
The triangle isocele is formed with 2 right triangles.
(base=5/2 hypotenuse=7)
cos B=(5/2)/7=5/14 (the same) ==>B=69°
A=B=69°
C=42°
C is the answer to your question
D = 20 , v = 19
20v + 12d - 6v
= 20 (19) + 12 (20) - 6 (19)
= 380 + 240 - 114
= 620 - 114
= 506
When d = 20 and v = 19
20v + 12d - 6v = 506
Answer:
Cost of one rose bush is $6 and the cost of one shrub is $5 .
Step-by-step explanation:
Let us assume that the cost of one rose bush be x .
Let us assume that the cost of one shrub be y .
As given
Shanice and mofor each improved their yards by planting rose bushes and shrubs.
They bought their supplies from the same store. Shanice spent $48 on 3 rose bushes and 6 shrubs.
Equations becomes
3x + 6y = 48
Mofor spent $51 on 6 rose bushes and 3 shrubs.
Equations becomes
6x + 3y = 51
Multiply 3x + 6y = 48 by 3 .
3 × 3x + 3 × 6y = 3 × 48
9x + 18y = 144
Multiply 6x + 3y = 51 by 6
6 × 6x + 6 × 3y = 6 × 51
36x + 18y = 306
Subtracted 9x + 18y = 144 from 36x + 18y = 306 .
36x - 9x + 18y - 18y = 306 - 144
27x = 162
x = 6
Putting the value of x in the equation 9x + 18y = 144 .
9 × 6 + 18y = 144
54 + 18y = 144
18y = 144 - 54
18y = 90
y = 5
Therefore the cost of one rose bush is $6 and the cost of one shrub is $5 .