Answer:
in this question what we have to do please can you tell
Answer:
x=157
Step-by-step explanation:
f(x)=2x^4-5
Substitute -3 for x.
f(-3)=2*(-3)^4-5
x=157
Answer:
30 students
Step-by-step explanation:
40% boys and 12 boys so 60% is girls
40/100=12/x
x=30
30-12 is 18
so 30 students, 12 boys, and 18 girls.
The value of x is 6 cm.
Step-by-step explanation:
Given,
Area of rectangle = 56 cm
Length of rectangle = x+2
Width of rectangle = 2x-5
Area = Length * Width

Factorizing

Either,
2x+11 = 0 => 2x=-11
Or,
x-6=0 => x=6
As x is added to dimension, it cannot be negative.
Therefore,
The value of x is 6 cm.
Keywords: rectangle, factorization
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