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horrorfan [7]
2 years ago
14

Is -3(4x+5) equal to -7(8x+9)

Mathematics
1 answer:
Elenna [48]2 years ago
6 0

Answer:

yes it is

Step-by-step explanation:

because -3(4x+5)= 27 so as the other

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Please help! 12 points
Ivahew [28]

Answer:

Step-by-step explanation:

sin2x = 2sinx*cosx

         = 2\sqrt{sin^{2}x } * cosx

         = 2\sqrt{(1-cos^{2}x } * cosx

         = 2  \sqrt{1-\frac{3}{5} ^{2} } *\frac{3}{5}

         = \frac{8}{5}  * \frac{3}{5}  

         = 24/25        

8 0
3 years ago
What are the coordinates of the orthocenter of △JKL with vertices at J(−4, −1) , K(−4, 8) , and L(2, 8) ?
Sati [7]

<u>Answer-</u>

<em>The coordinates of the orthocenter of △JKL is (-4, 8)</em>

<u>Solution-</u>

The orthocenter is the point where all three altitudes of the triangle intersect. An altitude is a line which passes through a vertex of the triangle and is perpendicular to the opposite side.

For a right angle triangle, the vertex at the right angle is the orthocentre of the triangle.

Here we are given the three vertices of the triangle are  J(-4,-1), K(-4,8) and L(2,8)

If the triangle JKL satisfies Pythagoras Theorem, then triangle JKL will be a right angle triangle.

Applying distance formula we get,

JK^2= (-4+4)^2+ (8+1)^2=0+81=81\\\\KL^2= (-4-2)^2+ (8-8)^2=36+0=36\\\\JL^2= (-4-2)^2+(8+1)^2=36+81=117

As,

\Rightarrow 117=81+36

\Rightarrow JL^2=JK^2+KL^2

\Rightarrow \text{JKL is a right angle triangle}

\Rightarrow \angle K=90^{\circ}

Therefore, the vertex at K (-4, 8) is the orthocentre.

3 0
3 years ago
Find the value of x. The angle measures of a right triangle are <br>30°<br>2x°<br>3x°​
Radda [10]

Answer:

30

Step-by-step explanation:

Exterior angle equals sum of opposite interior angles

3x = 2x + 30

3x - 2x = 30

x = 30

3 0
3 years ago
Read 2 more answers
PLEASE HELP ASAP!!! I WILL GIVE 13 POINTS: Translate into algebraic expression- n−1 increased by 110%
garik1379 [7]

Answer:

(n-1)2.1

Step-by-step explanation:

Since it already gives you a vaariable <u>n</u>, -->

P (n-1) -->

COnvert 110% to 2.1 / decimal

--> multiply

(n-1)2.1

Hope this helps!

5 0
3 years ago
Someone please help me!!! ill give brainliest
vovikov84 [41]
16 cm^2. The area of a triangle is 1/2 x b x h, hence, 1/2 x 8 x 4= 16cm^2
5 0
2 years ago
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