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3 years ago

KaVaugn wants to solve the following system using the elimination method:

Mathematics

2 answers:

UkoKoshka [18]3 years ago

8 0

I believe that the answer is C

igor_vitrenko [27]3 years ago

3 0

Answer:

d.-6

Step-by-step explanation:

sana makatulong

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If someone could figure out the top question that would be great, thank you so much!

Maurinko [17]

I think i only get some of it. this is what i did

x = -3 to 4y = 0.3 to 3if we use -3 and 3a < -1 < b
a= -2 to infiniteb= 0 to infinite

5 0

3 years ago

What is the value of x in this figure?

slega [8]

Check the picture below.

$\bf 10\cdot \stackrel{cos(30^o)}{\cfrac{\sqrt{3}}{2}}=x\implies 5\sqrt{3}=x$

5 0

3 years ago

Write in numeral form 4*100+2*10+8(6*1/10) +(1*1/100)

Mice21 [21]

Answer:428 7/100

Step-by-step explanation:

5 0

3 years ago

Solve the inequality and graph the solution <br> x +1 2/5 _< 6 8/10

mixer [17]

Answer: x < 5 $\frac{2}{5}$

Step-by-step explanation:

x + 1 $\frac{2}{5}$ < 6 $\frac{8}{10}$

x + 1 $\frac{2}{5}$ < 6 $\frac{4}{5}$

x < 5 $\frac{2}{5}$

graph is attached

6 0

2 years ago

The martinez family has a walkway around their swimming pool. the area of the walkway can

DiKsa [7]

The width of the walkaway be 4 feet.

<h3>What is Discriminant Formula?</h3>

The discriminant formula is used to determine the nature of the roots of a quadratic equation. The discriminant of a quadratic equation $ax^{2} +bx+c=0$ is D = $b^{2} -4ac$

If D > 0, then the equation has two real distinct roots.

If D = 0, then the equation has only one real root.

Given that: $Area\; of \;walkway,\; a(w)\;= 4w^{2} + 100 w$

also, area of walkaway = 464 square feet.

So, $4w^{2} + 100 w =464$

$4w^{2} + 100 w -464=0$

Using Discriminant method,

a=4, b=100, c=-464

$w= \frac{-b\pm\sqrt{b^{2}-4ac} }{2a}$

w= $\frac{-100\pm\sqrt{(100)^{2}-4*4*(-464)} }{2*4}$

w= $\frac{-100\pm\sqrt{17424} }{8}$

So, $w_1= \frac{-100+\sqrt{17424} }{8} \;\;\;\; w_2= \frac{-100-\sqrt{17424} }{8}$

$w_1= \frac{-100+132 }{8} \;\;\;\; w_2= \frac{-100-132}{8}$

$w_1 = 4 \;\;\;\; and \;\;\; w_2= -29$

Hence the width of the walkaway be 4 feet.

Learn more about discriminant formula here:

brainly.com/question/2615966

#SPJ1

8 0

2 years ago