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2 years ago

If [×] =5 what is the value of x?

Mathematics

2 answers:

Svetradugi [14.3K]2 years ago

3 0

Answer:

x = 5

Step-by-step explanation:

I didn't quite understand what you were asking but x should equal 5

Licemer1 [7]2 years ago

3 0

Answer: 1 is the answer because nothing time _ will equal 5 but 1 times anything equal that number So its 1

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HELP!!! FIRST TO ANSWER GETS BRAINIEST!!!Which of the following equations was used to graph the line shown?

rusak2 [61]

Answer:

Which Equations???

Step-by-step explanation:

Also for coordinates its

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And I think I answer is A

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2 years ago

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Helpp!! i need help in number 7, 8, and 9 PLEASE i will give brainlest and alot of points!!!!

Tpy6a [65]

Answer:

7/8 * 3/9 = 7/24 ≅ 0.2916667

Step-by-step explanation:

7/8 * 3/9 = 7 · 3/8 · 9 = 21/72 = 7 · 3/24 · 3 = 7

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2 years ago

In rectangle QRST, QS = x2 + 6x, and RT = 8x + 3. Find the length of QS.

valentina_108 [34]

The length of QS is 27 units.

<u>Step-by-step explanation:</u>

In the given rectangle QRST QS and RT are the diagonals. In a triangle, the opposite sides are equal and parallel. This implies that the diagonals of a rectangle are equal.

$QS=RT \ QS=x^2+6x$

$RT=8x+3$

$x^2+6x=8x+3$

$x^2+6x-8x-3=0$

$x^2-2x-3=0$

We have obtained a quadratic equation here and solving this gives the possible values of QS.This can be solved using quadratic formula

$x=(-b\pm \sqrt{(b^2-4ac))}/2a$

The quadratic equation is of the form $ax^2+bxl+c=0$

here a=1 b=-2 c=-3

$x=(-b\pm \sqrt{(b^2-4ac))}/2a$

$x=x=(2 \pm \sqrt{ (-2^2-4 \times 1 \times -3))}/(2 \times 1)$

$x=(2 \pm \sqrt{(4+12))} /2$ or

$x=(2 \pm \sqrt{16)}/2 =(2\pm 4)/2 \ \ \ \ x=(2+4)/2=3 \ \ \ \ or \ \ \ x=(2-4)/2=-1$

putting x=3 $QS=x^2+6x$

$=3^2+6 \times 3=9+18=27$

putting x=-1

$QS=(-1)^2+6 \times -1=1-6=-5$

Since a length can have only positive values QS=27 units.

5 0

3 years ago

one orange and one apple cost 1.05, two oranges and three apples cost $2.75, how much do two apples cost?

Nimfa-mama [501]

If you would like to know how much do two apples cost, you can calculate this using the following steps:

o ... the cost of one orange
a ... the cost of one apple

1 * o + 1 * a = $1.05
2 * o + 3 * a = $2.75
_______________
o + a = 1.05 ... o = 1.05 - a
2 * o + 3 * a = 2.75
2 * (1.05 - a) + 3 * a = 2.75
2.1 - 2 * a + 3 * a = 2.75
a = 2.75 - 2.1
a = $0.65

o = 1.05 - a = 1.05 - 0.65 = $0.4

2 * a = 2 * 0.65 = $1.3

The correct result would be: Two apples cost $1.3.

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2 years ago

Can someone help me please

sertanlavr [38]

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3 years ago

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