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valentina_108 [34]
3 years ago
7

What 4 coins equal 90¢

Mathematics
2 answers:
N76 [4]3 years ago
3 0

Answer:

half dollar, quarter, dime and nickel

Step-by-step explanation:

When you sum it up it will give you 90 cents.

mars1129 [50]3 years ago
3 0

Answer:a half coin, a quarter, a nickel, and a dime.

Step-by-step explanation:

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\text{The vertex form of a quadratic equation}\ f(x)=ax^2+bx+c:\\\\f(x)=a(x-h)^2+k\\\\(h,\ k)-\text{vertex}\\=====================================

\bold{METHOD\ 1:}\\\\\text{convert to the perfect square}\ (a+b)^2=a^2+2ab+b^2\qquad(*)\\\\f(x)=x^2+2x-3=\underbrace{x^2+2(x)(1)+1^2}_{(*)}-1^2-3\\\\f(x)=(x+1)^2-4\\==============================

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