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Rus_ich [418]
3 years ago
13

Simplify. –7 + 2(x – 3) A. x - 10 B. x - 13 C. 2x - 10 D. 2x - 13

Mathematics
2 answers:
Vika [28.1K]3 years ago
7 0
-7+2(x-3)\\use\ distributive\ property:a(b+c)=ab+ac\\\\-7+2(x)+2(-3)=-7+2x-6\\use\ commutative\ property:a+b=b+a\\\\2x+(-7)+(-6)=\boxed{2x-13}\to\boxed{D}
butalik [34]3 years ago
6 0
-7 + 2(x -3) =-7+2x-6=2x-13
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State the number of real zeros and what they are for "3x^2+5x-2" pleas help me:'(
Lady bird [3.3K]
This can be solved by factoring.

First, set the expression equal to zero.

3x^2+5x-2=0

Then, find two the factors of  ac whose sum is b.

6, -1

Split b into these two factors.

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

Next, factor by grouping.

3x(x+2)-1(x+2) = (3x-1)(x+2) = 0

By the Zero Product Property, set each factor equal to zero.

3x-1 = 0 \\ x = 1/3

x+2=0 \\ x = -2

These are the solutions. The Complex Conjugate Root Theorem and the Fundamental Theorem of Algebra both state that, in essence, real and imaginary solutions come in pairs of two and every polynomial of degree n has exactly n complex roots, but real roots are also complex roots. That sounds confusing, but this just means that you're done. Your answers are -2 and 1/3. There are two real roots.
3 0
3 years ago
What is 1+1 im pretty sue ites 5 buut i dot kow
Natasha_Volkova [10]

Answer:

1+1 is 2

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
That's the question ?? ​
Oksanka [162]

Step-by-step explanation:

Before we answer, the area of a Circle given it radius is

a = \pi r {}^{2}

The area of a circle given it diameter is

a =  \pi( \frac{d}{2} ) {}^{2}

So let answers question 1-4.

1. The area is

1024\pi

2. The area is

576\pi

3.

1.225\pi

4.

309.76\pi

For the 5th problem, circumference is

\pi \times d

where d is the diameter and

2\pi  r

where r is the radius.

A circumference of 100 m means the radius is 50 because

2\pi \times r = 100\pi

r = 50

So this means the area is

2500 {\pi}

3 0
2 years ago
HEY GUYS HELP, ILL MARK YOU BRAINLY !
Serjik [45]
Y=40x+100 and the second question is y=1.69x
5 0
2 years ago
If the discriminant is less than zero than the equation has ______________ solutions.
aleksley [76]

Answer:

The discriminant is the part under the square root in the quadratic formula, b²-4ac. If it is more than 0, the equation has two real solutions. If it's less than 0, there are no solutions. If it's equal to 0, there is one solution.

Brainliest please

Step-by-step explanation:

7 0
3 years ago
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