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2 years ago

My teacher doesn’t really teach, so I don’t understand ANYTHING, so just need some help figuring out he answer !

Mathematics

2 answers:

liq [111]2 years ago

7 0

This triangle is an isosceles triangle. That means that the two base angles are equal.

You can set the two expressions equal to each other.

15x-13=8x+29

Solving this, you will find that x=6

Now you can plug x into the two expressions.

15(6)-13=77

8(6)+29=77

Those are the measurements of the two angles.

To find the last angle, you know that the angles of any triangle add up to 180 degrees. Using this information, you can add up the 3 angle measurements and set them equal to 180.

77+77+2y=180

y=13

Now plug in y.

2(13)=26

THe three angle measures are 77, 77, and 26

kozerog [31]2 years ago

6 0

Set it up as 15x-13+8x+29+2y=180 and then just find a algebra calculator and put that formula in there

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3. Factor x2 – 6x – 7. A.(x –7)(x –1) B. (x – 7)(x + 1) C. (x + 7)(x – 1) D. (x + 4)(x + 7)

zhuklara [117]

Its B, because (x-7)(x+1)=x^2-6x-7.

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2 years ago

NO LINKS!! Use the method of substitution to solve the system. (If there's no solution, enter no solution). Part 11z

Roman55 [17]

Answer:

$(x,y)=\left(\; \boxed{-1,-8} \; \right)\quad \textsf{(smaller $x$-value)}$

$(x,y)=\left(\; \boxed{5,16} \; \right)\quad \textsf{(larger $x$-value)}$

Step-by-step explanation:

Given system of equations:

$\begin{cases}y=x^2-9\\y=4x-4\end{cases}$

To solve by the method of substitution, substitute the first equation into the second equation and rearrange so that the equation equals zero:

$\begin{aligned}x^2-9&=4x-4\\x^2-4x-9&=-4\\x^2-4x-5&=0\end{aligned}$

Factor the quadratic:

$\begin{aligned}x^2-4x-5&=0\\x^2-5x+x-5&=0\\x(x-5)+1(x-5)&=0\\(x+1)(x-5)&=0\end{aligned}$

Apply the <u>zero-product property</u> and solve for x:

$\implies x+1=0 \implies x=-1$

$\implies x-5=0 \implies x=5$

Substitute the found values of x into the <u>second equation</u> and solve for y:

$\begin{aligned}x=-1 \implies y&=4(-1)-4\\y&=-4-4\\y&=-8\end{aligned}$

$\begin{aligned}x=5 \implies y&=4(5)-4\\y&=20-4\\y&=16\end{aligned}$

Therefore, the solutions are:

$(x,y)=\left(\; \boxed{-1,-8} \; \right)\quad \textsf{(smaller $x$-value)}$

$(x,y)=\left(\; \boxed{5,16} \; \right)\quad \textsf{(larger $x$-value)}$

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6 months ago

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Solar panel generates 3/5 of kilowatts of power a warehouse wants to generate 24 kilowatts of power write an expression to find

Anuta_ua [19.1K]

Answer:

The warehouse will need 40 solar panels

Step-by-step explanation:

3/5 kilowatts is generated by 1 solar panel

24 kilowatts will be generated by ?

24 ÷ 3/5 = (24×5)/3 = 120/3 = 40 solar panels.

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2 years ago

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2 years ago

You invest $6500 into a mutual fund that is expected to earn 6% per year. How long will it take the fund to be worth $13,000?

tester [92]

This is a compound interest problem so you cannot use the simple interest formula. Effectively the total amount is being compounded each year by 6%. There is a formula for compound interest but in this simple example you can work this out recursively.

year 1 = 6500
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year3 = 6890*1.06 = 7303
year4 = 7303*1.06 = 7741..
etc......
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2 years ago

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