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2 years ago

PLEASE HELP urgent math questions

Mathematics

1 answer:

Phoenix [80]2 years ago

7 0

Answer:B

Step-by-step explanation:

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Mathematics question

Nimfa-mama [501]

Step-by-step explanation:

area of rectangle (a1)=b×h

20×30
600in²

area of triangle=1/2 ×b×h

1/2×40×30
600in²

total area of arrow=a1+a2

600+600
1200in²

<h3>stay safe healthy and happy.</h3>

8 0

3 years ago

Help me with this question pleasee

Liono4ka [1.6K]

Answer:

√23 = a

Step-by-step explanation:

/ab/²= /ac/²+/bc/² (Pythagoras theorem)

12² = a² +11²

144 = a² + 121

144 - 121 = a²

23 = a²

√23 = a

7 0

2 years ago

Does 28/4 have a remainder

Oksanka [162]

No but it equals to 7 :)

3 0

2 years ago

Read 2 more answers

Find the equation of the tangent line to the curve (a lemniscate)

olya-2409 [2.1K]

Answer:

$m=\frac{9}{13}$ and $b=\frac{40}{13}$

Step-by-step explanation:

The equation of curve is

$2(x^2+y^2)^2=25(x^2-y^2)$

We need to find the equation of the tangent line to the curve at the point (-3, 1).

Differentiate with respect to x.

$2[2(x^2+y^2)\frac{d}{dx}(x^2+y^2)]=25(2x-2y\frac{dy}{dx})$

$4(x^2+y^2)(2x+2y\frac{dy}{dx})=25(2x-2y\frac{dy}{dx})$

The point of tangency is (-3,1). It means the slope of tangent is $\frac{dy}{dx}_{(-3,1)}$ .

Substitute x=-3 and y=1 in the above equation.

$4((-3)^2+(1)^2)(2(-3)+2(1)\frac{dy}{dx})=25(2(-3)-2(1)\frac{dy}{dx})$

$40(-6+2\frac{dy}{dx})=25(-6-2\frac{dy}{dx})$

$-240+80\frac{dy}{dx})=-150-50\frac{dy}{dx}$

$80\frac{dy}{dx}+50\frac{dy}{dx}=-150+240$

$130\frac{dy}{dx}=90$

Divide both sides by 130.

$\frac{dy}{dx}=\frac{9}{13}$

If a line passes through a points $(x_1,y_1)$ with slope m, then the point slope form of the line is

$y-y_1=m(x-x_1)$

The slope of tangent line is $\frac{9}{13}$ and it passes through the point (-3,1). So, the equation of tangent is

$y-1=\frac{9}{13}(x-(-3))$

$y-1=\frac{9}{13}(x)+\frac{27}{13}$

Add 1 on both sides.

$y=\frac{9}{13}(x)+\frac{27}{13}+1$

$y=\frac{9}{13}(x)+\frac{40}{13}$

Therefore, $m=\frac{9}{13}$ and $b=\frac{40}{13}$ .

5 0

2 years ago

Find X. please i need help with this

-BARSIC- [3]

Answer:

Step-by-step explanation:

X + X + 96 = 180 {SUM OF ANGLES OF TRIANGLE}

2X + 96 = 180

2X = 180 -96

2X =84

X = 84/2

X = 42

4 0

3 years ago

Read 2 more answers