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3 years ago

Please help, please briefly explain, (awarded brainliest)

Mathematics

2 answers:

Arlecino [84]3 years ago

6 0

Answer:

Step-by-step explanation:

when f(x)=0 is when y=0. When y=0 is the x-intercept. There are three x-intercepts because the line crosses the x-axis 3 times, which are -3, -1, and 2.

anastassius [24]3 years ago

4 0

Answer:

Step-by-step explanation:

Its basically whatever point(s) meet exactly the on the x axis

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A triangle has two constant sides of length 5 feet and 7 feet. The angle between these two sides is increasing at a rate of 0.9

o-na [289]

Answer: $12.74 ft^2/s$

Step-by-step explanation:

Given

Two sides of triangle of sides 5 ft and 7 ft

and angle between them is increasing at a rate of 0.9 radians per second

let $\theta$ is the angle between them thus

Area of triangle when two sides and angle between them is given

$A=\frac{ab\sin C}{2}$

$A=\frac{5\times 7\times \sin \theta }{2}$

Differentiate w.r.t time

$\frac{\mathrm{d} A}{\mathrm{d} t}=\frac{35\cos theta }{2}\times \frac{\mathrm{d} \theta }{\mathrm{d} t}$

at $\theta =\frac{\pi }{5}$

$\frac{\mathrm{d} A}{\mathrm{d} t}=\frac{35\times cos(\frac{\pi }{5})}{2}\times 0.9$

$\frac{\mathrm{d} A}{\mathrm{d} t}=12.74 ft^2/s$

4 0

4 years ago

Expand using binomial theorem

kari74 [83]

The answer is -1
Hope this helps!

5 0

3 years ago

Help please bad please

Sergio [31]

Answer:

$\displaystyle A .20$

Step-by-step explanation:

By tangent theorem we acquire:

$\displaystyle x + 10 = 9 + 21$

simplify addition:

$\displaystyle x + 10 = 30$

cancel 10 from both sides:

$\displaystyle x = 20$

hence,

our answer is A

4 0

3 years ago

I NEED HELP GIVE CROWN

monitta

Answer:

B, $1.32

Step-by-step explanation:

100 grams is 0.1 kilograms, and 25 grams is 0.025 kilograms. The difference is 0.075 kilograms. At $17.60 per kilogram, 0.075 kilograms would cost $1.32 or answer choice B.

6 0

3 years ago

Solve the Quadratic Equation By Completing the Square b^2-15b-54=0

vladimir1956 [14]

$b^{2}-15b-54=0. \newline
b^{2}-15b=54. \newline
b^{2}-15b+(\frac{15}{2})^{2}=54+(\frac{15}{2})^{2}. \newline
(b-\frac{15}{2})^{2}=\frac{441}{4}. \newline
b-\frac{15}{2}=\pm\frac{21}{2}. \newline
b=\pm\frac{21}{2}+\frac{15}{2}. \newline
b_1 = -3, b_2 = 18.$

3 0

3 years ago