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3 years ago

I need help with this.

Mathematics

1 answer:

Mila [183]3 years ago

5 0

Answer:

question 6 is d

question7 is c

question 8 is a

Step-by-step explanation:

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The sum of a number and 15 is 63 find the number

tatuchka [14]

Answer:

x = 48

Step-by-step explanation:

$x+15=63\\x=48$

3 0

3 years ago

Read 2 more answers

“Two lines in a plane always intersect in exactly one point.”

arsen [322]

The answer is B.
Parallel lines as they are in the same plane but never meet.

3 0

3 years ago

Will mark brainliest! Questions are in the picture!

alexdok [17]

Answer:

52.9 inches .

Step-by-step explanation:

Given that the triangular indentation has an area of 100 in.² and the base and height of this traingle are represented by expressions 3x and x+3 respectively . We need to find out the perimeter to the nearest tenth.

As we know that the area of triangle is ,

$\rm\longrightarrow Area_{\triangle}=\dfrac{1}{2}(base)(height)$

Substituting the respective values,

$\rm\longrightarrow 100\ =\dfrac{1}{2}(x+3)(3x)\\\\\rm\longrightarrow 2(100) = 3x(x+3)\\\\\rm\longrightarrow200 = 3x^2+9x\\\\\rm\longrightarrow 3x^2+9x-200=0$

On using the Quadratic formula , we have;

$\rm\longrightarrow x =\dfrac{-9\pm\sqrt{9^2-4(3)(-200)}}{2(3)} \\\\\rm\longrightarrow x =\dfrac{-9\pm \sqrt{81+1200}}{6}\\\\\rm\longrightarrow x =\dfrac{-9\pm \sqrt{1281}}{6}$

On simplifying above , we will get ,

$\rm\longrightarrow x = 6.802,-9.802$

Since sides can't be negative, therefore,

$\rm\longrightarrow\underline{\underline{ x =6.802}}$

Therefore ,

$\rm\longrightarrow Base = 3x =3(6.802)in = 20.406\ in\\$
$\rm\longrightarrow Height = x +3=6.802+3=9.802\ in$

Next let's find out the hypotenuse using Pythagoras theorem, as ;

$\rm\longrightarrow h=\sqrt{ b^2+p^2}\\$

$\rm\longrightarrow h =\sqrt{ (20.406)^2+(9.802)^2}\\$

$\rm\longrightarrow h =\sqrt{416.40+96.07}\\$

$\rm\longrightarrow h = 22.63\ in$

Now we may find perimeter as ,

$\rm\longrightarrow P = p + b + h \\$

$\rm\longrightarrow P = (22.63 + 9.802 + 20.406)in.$

$\\\rm\longrightarrow P = 52.89 \ in.\\$

$\rm\longrightarrow \underline{\underline{ Perimeter = 52.9\ in .}}$

8 0

2 years ago

Which ordered pairs are on the line with equation y−0.75=1.25(x−3)?

Sergeeva-Olga [200]

The answer is Option D. (4,2)

in this type of question , you just need to input the (x,y) , and see if the amount is correct

y - 0.75 = 1.25 (x-3)

2 - 0.75 = 1.25 ( 4 - 3)

1.25 = 1.25 (1)

1.25 = 1.25

hope this helps

6 0

3 years ago

Pls someone, pls explain aswell !!

Margaret [11]

Answer:

absolute value

Step-by-step explanation:

4 0

3 years ago