Answer: Let x represent the cost of one of Tanya's items.
Then the cost of one of Tony's items =x - 2.25. But we have:
3x =4(x - 2.25)
3x =4x - 9 subtract 3x from both sides
0 =x - 9 add 9 to both sides
x=$9 The cost of one of Tanya's items
27 Total cost of Tanya's 3 items
2.25 =$6.75 cost of one of Tony's items.
27 Total cost of Tony's 4 items.
3 x 6.75 =$27. This shows that both Tony and Tanya spent the same amount of money.
Step-by-step explanation:
Answer:
D 7
Step-by-step explanation:
Total no. of bulb= 5
no. of defected bulb= 3
no. of not defected bulb=2
Total no. of bulb combination = 5C2
=5!/2!(5-2)!
= 5!/2!3!
= 5×4×3×2×1/2×1×3×2×1
=120/12
=10
( since a room can be lighted with one bulb also)
total no. of bulb combination when room shall not light = 3C2
3!/2!(3-2)!
= 3!/2! 1!
= 3×2×1/2×1×1
= 6/2
=3
Now,
Total no. of trial when room shall light
=10-3
=7
Hence, number of trial when the room shall be lighted is 7 which is option d
Answer:
-3,-5
Step-by-step explanation:
Answer:
Hi there!
To find an expression equal to 5(h+9), we can distribute the 5 into the equation.
5*h + 5*9
= 5h + 45
Hope this help?
Step-by-step explanation:
Please mark me brainly
You have to substitute 8 for all the equations and then you'll have your answer.
2(8) +10= 16+10= 26
A) 3(8)= 24 no
B) 2(8+5)= 2(13)= 26 YES
C) 8^2+5= 64+5= 69 no
D) 10(8)+2= 80+2= 82 no
