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3 years ago

Find the surface area (the triangle are right triangles).

Mathematics

1 answer:

Igoryamba3 years ago

4 0

Answer:

67.5

Step-by-step explanation:

Well area of a triange is 1/2bh so we can find the side closest to us by doing

1/2(3x4) which is 12

the other side would be 1/2 (3x5) which is 7.5

the bottom side would be 1/2(8x4) so 16

and 1/2 (3x8) so 12

1/2 (8x5) so 20

add those together to get 67.5

Hope this helped ya!

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The diffrence between two positive numbers is 7 and the square of thier sum is 289

kicyunya [14]

Answer:

One of the Numbers is -151 and the other is -144

Step-by-step explanation:

Set up the equations then solve

6 0

3 years ago

What is the product of (2x-1)(x+4)

Novay_Z [31]

Answer:

$\large\boxed{(2x-1)(x+4)=2x^2+7x-4}$

Step-by-step explanation:

$(2x-1)(x+4)\qquad\text{use FOIL:}\ (a+b)(c+d)=ac+ad+bc+bd\\\\=(2x)(x)+(2x)(4)+(-1)(x)+(-1)(4)\\\\=2x^2+8x-x-4\qquad\text{combine like terms}\\\\=2x^2+(8x-x)-4\\\\=2x^2+7x-4$

4 0

3 years ago

What is the quotient in simplified form ? Need help please

Gre4nikov [31]

Answer:

$-\dfrac{4a^{12}b^8}{5}$

Step-by-step explanation:

The applicable rules of exponents are ...

$\dfrac{1}{a^{-b}}=a^b\\\\a^ba^c=a^{b+c}$

Your ratio simplifies to ...

$\dfrac{-8a^8b^{-2}}{10a^{-4}b^{-10}}=-\dfrac{4}{5}a^{8-(-4)}b^{-2-(-10)}\\\\=-\dfrac{4a^{12}b^8}{5}$

_____

Please note that simplifying the constants, -8/10 to -4/5, eliminates half the answer choices. Since exponents are only multiplied when a power is raised to a power, you can pretty much eliminate the second choice as being unreasonable. ((a^b)^c = a^(bc))

8 0

3 years ago

The art teacher has 30 boxes of crayons with 16 cans in each box she gives the students 10 of the boxes to use explain how to fi

Mamont248 [21]

I'm going to assume you meant crayon instead of can:

First step is to find how many boxes she/he has left.

30 - 10 = 20

So the teacher has 20 boxes left;

Now, knowing that each box has 16 crayons, then we simply multiply the 20 by 16 to find the total number of crayons left over:

20 x 16 = 320

So the art teacher has 320 crayons left over.

Hope this helps!

3 0

3 years ago

F(x)=5x^4 helllllpppppp

Marina CMI [18]

we can use properties of functions to find this out

for $f(x)=ax^b$

if b is even, then the ends of the function go in the same directions (both up or both down)

if b is odd, then the ends of the function go in different directions (one up and one down)

if a is positive and b is even, then both ends point up

if a is positve and b is odd, then it goes from bottom left to top right

if a is negative and b is even, then both ends point down

if a is negative and b is odd, then it goes from top left to bottom right

given $f(x)=5x^4$

a=5>0

b=4 which is even

so it has both ends pointing up

bottom right graph is yo answer

7 0

3 years ago