Answer:
7x+3
Step-by-step explanation:
To simpfly, it would help by simply ignoring the variable (x) and just looking at the number before it, solving it like a regular math problem, from left to right.
9(x) - 2(x) = 7(x)
(-4)-(-7) = 3 --> since there's a minus sign in the middle subtracting the two numbers and one on the -7, the -7 becomes a positive 7. A negative times a negative is always positive so, it would technically be -4+7=3.
Put both of these two numbers together and you get your answer,
7x+3.
If you're having trouble with the part I explained the image might help. Read it from left to right. A negative # + a negative # = positive #, as seen by the first row.
Answer:
149.45 cm²
Step-by-step explanation:
Surface area of pyramid = ½Pl + BA
Perimeter of the base (P) = 7 + 7 + 7 = 21 cm
Slant height (l) = 12.2 cm
Area of base (BA) = ½*bh = ½*7*6.1 = 21.35 cm²
Plug in the values
Surface area = ½*21*12.2 + 21.35 = 149.45 cm²
Answer:
Any number: 49:28
Step-by-step explanation:
Whatever number you multiply, it will still simplify to 7:4
Answer: 350km/h,349
Step-by-step explanation:Find the exact value using tringometric identities