3 years ago

13. Select all the expressions equivalent to (4x5)(5x6).

Mathematics

1 answer:

kykrilka [37]3 years ago

3 0

Answer:

(4×6)(5×5)

20 × 30

(4×5)(6×5)

(2×5)(10×6)

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3 years ago

State the range of possible values for x if (3x+5)(x-1) < 2x+7

lara31 [8.8K]

we are given with the inequality

$(3x+5)(x-1) < 2x+7\\ \\$

Open the parenthesis we get on left side we get

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3 years ago

Ad is tangent to circle o at d. find ab. round to the nearest tenth if necessary

Naddik [55]

Check the picture below.

$\bf 0=AB^2+6AB-121\implies \stackrel{\textit{using the quadratic formula}}{AB=\cfrac{-6 \pm \sqrt{6^2-4(1)(-121)}}{2(1)}}
\\\\\\
AB=\cfrac{-6 \pm \sqrt{520}}{2}\implies AB=\cfrac{-6 \pm \sqrt{4\cdot 130}}{2}
\\\\\\
AB=\cfrac{-6 \pm \sqrt{2^2\cdot 130}}{2}\implies AB=\cfrac{-6 \pm 2\sqrt{130}}{2}
\\\\\\
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\begin{cases}
\boxed{-3+\sqrt{130}}\\\\
-3-\sqrt{130}
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since the distance AB cannot be a negative value, thus is not -3-√(130).