A; b; c; d = first; second; third; fourth shelfa + b + c + d = 250 cmb = 2a + 18c = a - 12d = a + 4in terms of a, plug all equations into originala + (2a + 18) + (a - 12) + (a +4) = 2505a + 10 = 2505a = 240a = 48b = 2(48) + 18b = 96 + 18b = 114 cm/1.14 m
Answer:
/75
Step-by-step explanation:
As I couldn't take the radical symbol I used this - "/".
5 /3
If 5 has to come in the radical sign it has to be squared
So, /25 × /3
/25×3
/75
Answer:
Answer is 5 pounds of bananas
Step-by-step explanation:
Required milk:
Milk= 2 gallons
Milk cost per gallon=$0.75
so,
2*0.75
$ 1.5
total amount =$2.25
to calculate bananas
$2.25-$1.5=$0.75
per pound cost of bananas =$0.15
$0.75/$0.15
5 pounds of bananas
Answer:
y = -3
Step-by-step explanation:
9x + 7y = -12
9(1) + 7y = -12
9 + 7y = -12
7y = -12 - 9
7y = -21 (divide both sides by 7)
y = -3
Answer:
(3x + 1) • (3x - 1)
Step-by-step explanation:
Step by Step Solution
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STEP
1
:
Equation at the end of step 1
3x - 1
STEP
2
:
Trying to factor as a Difference of Squares:
2.1 Factoring: 9x-1
Theory : A difference of two perfect squares, A - B can be factored into (A+B) • (A-B)
Proof : (A+B) • (A-B) =
A - AB + BA - B2 =
A- AB + AB - B2 =
A - B2
Note : AB = BA is the commutative property of multiplication.
Note : - AB + AB equals zero and is therefore eliminated from the expression.
Check : 9 is the square of 3
Check : 1 is the square of 1
Check : x is the square of x1
Factorization is : (3x + 1) • (3x - 1)
Final result :
(3x + 1) • (3x - 1)