Someone help me with my algebra homework please
2 answers:
Answer:
15
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction
Equality Properties
Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality<u>
</u> Step-by-step explanation:
<u>Step 1: Define</u>
<em>Identify</em>
5a - 10b = 45
<em>b</em> = 3
<u>Step 2: Solve for </u><em><u>a</u></em>
Substitute in <em>b</em> [Equation]: 5a - 10(3) = 45 Multiply: 5a - 30 = 45 [Addition Property of Equality] Add 30 on both sides: 5a = 75 [Division Property of Equality] Divide 5 on both sides: a = 15
Answer:
a=3
Step-by-step explanation:
5a-10b=45
when b=3
5a-10×3=45
5a-30=45
collect like terms
5a=45-30
5a=15
a=3
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Well the pyramid surface area is just 4 triangles that are the same shape and 1 square. so the square's area = 4*4 = 16 and a triangle would be 5*4*0.5 = 10 but there are 4 triangles so 4*10 = 40 plus the area of the circle so the answer is 56
Your answer is 1/2 Hope this helps!
Answer:
30 oranges
Step-by-step explanation:
2 apples : 5 oranges
12 apples : 30 oranges
because 12 apples is 6 times the original ratio, so we multiply the 5 oranges by 6 too.
Answer:
f(- 2) = 1
Step-by-step explanation:
Evaluate f(- 2) by substituting x = - 2 into f(x)
f(- 2) = - 2(- 2) - 3 = 4 - 3 = 1
M² is equivalent to the expression M x M .