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svetoff [14.1K]
3 years ago
10

4.

Mathematics
1 answer:
OLEGan [10]3 years ago
3 0
I would say it’s A....
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I need help plz answer as soon as possible
Gekata [30.6K]

Answer:

x = 7

Step-by-step explanation:

Let's join A & C . If points A ,B & C are collinear , then definitely B point's gonna lie on line segment AC .

So , AC = AB + BC

In the question , length of AC = 3x + 3 , length of AB = 2x - 1 ( or -1 + 2x)

& length of BC = 11.

We know that AC = AB + BC . So putting the given values here :-

3x+3 = 2x -1 + 11\\=>3x +3 = 2x+10\\

Solving this linear eqn. gives

3x + 3=2x+10\\=> 3x-2x=10-3\\=>x=7

4 0
3 years ago
Consider the quadratic equation x squared = 4x - 5. how many solutions does the equation have?
snow_lady [41]

Answer:

The quadratic equation has two complex solutions

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to

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

in this problem we have

x^{2}=4x-5  

Equate to cero

x^{2}-4x+5=0  

so

a=1\\b=-4\\c=5

substitute in the formula

x=\frac{4(+/-)\sqrt{-4^{2}-4(1)(5)}} {2(1)}

x=\frac{4(+/-)\sqrt{16-20}} {2}

x=\frac{4(+/-)\sqrt{-4}} {2}

Remember that

i^{2}=-1

so

x=\frac{4(+/-)2i} {2}

x=2(+/-)i

therefore

The quadratic equation has two complex solutions

5 0
3 years ago
On a map, 1 inch equals 10 miles. If two cities are 5 inches apart on the map, how far are they actually apart?
rosijanka [135]

Answer:

50 miles apart

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A game at the school carnival involves drawing colored marbles out of a bag for a prize. If you draw a red or blue marble, you w
mina [271]
All up there are 20 marbles and only 6 of those are chances of winning so we make it into a fraction 6/20 then times 20 by five to get to 100 (what ever we do to the bottom we do to the top) times 6 by five giving you a fraction of 30/100 then divide 30 by 100 giving you 0.30 ANSWER EQUALS = 0.30
4 0
3 years ago
FOIL backwards #5 please & thank you :)
larisa86 [58]


(5x+7)(2x−3) is the answer
8 0
3 years ago
Read 2 more answers
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