2 years ago

Product of 3 and 25 plus the product of 5 and 30? It has to be an expression

Mathematics

2 answers:

Yakvenalex [24]2 years ago

8 0

Answer:

3(25)+5(30)

Step-by-step explanation:

Product means multiplying 2 things together and expression means you do not solve the equation you just leave it be

Verdich [7]2 years ago

6 0

3 x 25 + 5 x 30
hope this helps!!

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A baseball player has a batting average of 0.250, which means he gets a hit 25% of the time he is at bat. If he bats 450 times d

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A room 9.5 m long and 6 m wide is surrounded by a verandah 1.25 m wide. Calculate the cost of

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Read 2 more answers

2. Suppose (220)_b and (251)_b are the squares of consecutive integers. Determine b.

Andrei [34K]

Let $x$ and $x+1$ be these consecutive integers. For some base $b$ , we can write

$(x_{10})^2=220_b=2b^2+2b$

$((x+1)_{10})^2=251_b=2b^2+5b+1$

$x^2=2b^2+2b$

then

$x^2+1=2b^2+2b+1$

Now,

$x^2+2x+1=2b^2+5b+1$

$2x+2b^2+2b+1=2b^2+5b+1$

$\implies2x=3b$

Squaring both sides gives

$4x^2=9b^2$

and so

$4(2b^2+2b)=9b^2$

$\implies8b^2+8b=9b^2$

$\implies b^2-8b=0\implies\boxed{b=8}$

(because the base has to be non-zero)

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2 years ago