Someone help me with these math problems please
Please
2 answers:
Answer:
a=15 26.1 + b =54.6
Step-by-step explanation:
for the second question we first multiply 8.7 by 3 which gives us 26.1 and since there is only one answer with 26.1 it's it.
Answer:
a = 15
34.8 + b = 54.6
Step-by-step explanation:
First one:
5a - 10b = 45 (b = 3)
5a - 10(3) = 45
5a - 30 = 45
5a = 75
a = 15
Second one
b + a + 3a = 54.6
b + 4a = 54.6 ( a = 8.7)
b + 4(8.7) = 54.6
b + 34.8 = 54.6
34.8 + b = 54.6
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-14
Step-by-step explanation:
a·b = |a|×|b|×cos(angle between them)
= 4×7×(-1/2)
= -14
14+2*12/3=
14+24/3=
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22
Answer:
240 cubic centimetres
Step-by-step explanation:
volume of the right rectangular prism
