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LUCKY_DIMON [66]
3 years ago
6

Please help with these two questions?

Mathematics
2 answers:
Vedmedyk [2.9K]3 years ago
7 0
---------------------------------------
Question 2: 
---------------------------------------
a² + b² = c²
x² + 13² = 15²
x² = 15² - 13²
x² = 56
x = √56
x = 2√14 units

---------------------------------------
Question 4:
---------------------------------------
cos a° = adj/hyp
cos (30) = 12/y
y = 12 ÷ cos(30)
y = 12 ÷ 3√2
y = 4/√2 units

tan a = opp/adj
tan(30) = x/12
x = tan(30) x 12
x = 3√3 x 12
x = 36√3 units


Pepsi [2]3 years ago
4 0
The top one is x=7 and 4 is y=11 and x=7 idk just bacing it off the other triangles bc there all the same size except 3
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Which expression is equivalent to 3x-4+2(2+4x)
adell [148]
First distribute the 2(2+4x)

3x-4+4+8x

then just combine like terms.

8+11x

therefore

3x-4+2(2+4x)=8+11x<span />
6 0
3 years ago
Solve the following system by any method -8x-8y=0 -8x+2y=-20
iVinArrow [24]
                     \fbox{Solution by using Matrix} 

\text{Linear Equation} = -8x-8y=0 , -8x+2y=-20

\text{Rewrite the linear equations above as a matrix} 

\left[\begin{array}{ccc}8&-8&0\\-8&2&-20\\\end{array}\right] 

\text{Apply to Row2 : Row2 + Row1} 

\left[\begin{array}{ccc}8&-8&0\\-8&-6&-20\\\end{array}\right] 

\text{ Simplify rows} 

\left[\begin{array}{ccc}8&-8&0\\0&1&10/3\\\end{array}\right] 

\text{Note: The matrix is now in echelon form.}\text{The steps below are for back substitution.} 

\text{Apply to Row1 : Row1 + 8 Row2} 

\left[\begin{array}{ccc}8&0&80/30\\0&1&10/3\\\end{array}\right] 

\text{ Simplify rows}  

\left[\begin{array}{ccc}1&0&10/3\\0&1&10/3\\\end{array}\right] 

\text{Therefore, the solution is} 

x= \dfrac{10}{3} \ \text{and} \ \ y=\dfrac{10}{3}
7 0
3 years ago
Aiden has some $1 bills and $5 bills. He has 6 bills worth $22 total in his wallet. How many $1 bills does he have?
xxMikexx [17]
Four $5 bills and two $1 bills
In total it’s six bills
5(4)=20 and 1(2)=2
20+2=22
5 0
3 years ago
CAN YALL HELP PLZZzz
yulyashka [42]
The answer would be the third one .
Perpendicular would always be the opposite of your original slope.
Hope this helps! (:
6 0
3 years ago
Read 2 more answers
Put<br> 4y+x=-1 into y-intercept form and show how you did it.
artcher [175]
4y+x= -1
-x -x
—————
4y=-x-1
— ——
4 4
=======
Y= -1/4x - 1/4
Hoped this helps
3 0
3 years ago
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