3 years ago

Help please important

Mathematics

2 answers:

Kazeer [188]3 years ago

4 0

Answer:

Cos(41) x 30 = Answer

Step-by-step explanation:

Use a calculator to find it out

Lemur [1.5K]3 years ago

3 0

1) tan 41°= 30cm divide by y cm
y= 30 divide by tan-1 41°

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$\large\boxed{x=-\dfrac{7-\sqrt{97}}{4}\ \vee\ x=-\dfrac{7+\sqrt{97}}{4}}$

Step-by-step explanation:

$ax^2+bx+c=0\\\\\Delta=b^2-4ac\\\\\text{if}\ \Delta0,\ \text{then an equation has two solutions:}\ x=\dfrac{-b\pm\sqrt\Delta}{2a}\\\\\text{We have:}\\\\-2x^2-7x+10=4\qquad\text{subtract 4 from both sides}\\\\-2x^2-7x+6=0$

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