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2 years ago

Help! is it a or b?

Mathematics

1 answer:

Yuri [45]2 years ago

7 0

All real numbers satisfy the equation, try plugging in a number into x and you'll find out

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4 − –5f = –66 f = _______

Paraphin [41]

Answer:

f = -14

Step-by-step explanation:

given:

4 − (–5f) = –66

4 + 5f = -66 ( subtract 4 from both sides)

5f = -66 - 4

5f = -70 (divide both sides by 5)

f = (-70) / 5

f = -14

8 0

2 years ago

Solve 2csc^2x-2cscx-1=0 <br> for 0° ≤ x ≤ 360°

umka21 [38]

Answer:

Step-by-step explanation:

2 csc²x-2 csc x-1=0

$\frac{2}{sin^2x} -\frac{2}{sin x} -1=0\\multiply~by~sin^2x\\2-2sin~x-sin^2x=0\\sin^2x+2sinx-2=0\\sin ~x=\frac{-2 \pm\sqrt{2^2-4*1*(-2)} }{2*1} \\=\frac{-2 \pm\sqrt{4+8} }{2} \\=\frac{-2 \pm\sqrt{4*3} }{2} \\=\frac{-2 \pm2\sqrt{3} }{2} \\=-1\pm\sqrt{3} \\|sin~x| \le ~1\\so~sin~x=-1+\sqrt{3} \\sin~x=\sqrt{3} -1\\x=sin^{-1}(\sqrt{3} -1) \approx 47.06^\circ,180-47.06\\or~x=47.06^\circ,132.94^\circ$

6 0

2 years ago

A store pays $24 for a jewelry box and marks the price up by 20%. What is the amount of

Ratling [72]

Answer:

$4.8

Step-by-step explanation:

$24×20/100=$4.8

7 0

2 years ago

PLZ HELP ME I WILL BRAINLIST YOU

AURORKA [14]

Answer:

B. 15 $units^{2}$

Step-by-step explanation:

4 0

3 years ago

Which of the following correctly isolates the constant for the polynomial: x2 – 12x + 27

Andru [333]

Answer:

x^2 - 12x = -27

Step-by-step explanation:

Here, we want to isolate the constant for the polynomial

To do this, we start by setting the expression to zero

Afterwards, we can bring the constant term over the equal to sign, giving a change in sign value

Mathematically, we have this as;

x^2 - 12x + 27 = 0

x^2 - 12x = -27

5 0

3 years ago