2 years ago

B=5a+7 -3a+2b=-7 What is the solution to the system of equations shown above?

Mathematics

2 answers:

anastassius [24]2 years ago

6 0

But the file is not open

Elena-2011 [213]2 years ago

4 0

a+b=-19

Primero hay que separar los números de las letras y luego sumar y/o restar y listo

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The following polynomial can be factored using the techniques of this lesson x^2-18

Papessa [141]

Answer:

$(x+3\sqrt{2})(x-3\sqrt{2})$

Step-by-step explanation:

The given expression is $x^2-18$ .

The technique that can be used to factor this polynomial is the difference of two squares.

We rewrite the two expressions as;

$x^2-(\sqrt{18})^2$

Recall that;

$a^2-b^2=(a+b)(a-b)$

$x^2-(\sqrt{18})^2=(x+\sqrt{18})(x-\sqrt{18})$

$x^2-(\sqrt{18})^2=(x+3\sqrt{2})(x-3\sqrt{2})$

8 0

2 years ago

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Consider triangle ABC where AB=X+5, BC=X-2, area is 30cm squared. Find X by solving X^2+3X-70=0, and find the perimeter.

klasskru [66]

Answer:

What the hell AC is not given so you can't find the Perimeter

Step-by-step explanation:

x^2+3x-70=0

(x-7)(x+10)=0

x-7=0

x+10=0

x=-10

AB=x+5

AB=12

AB=-5

BC=x-2

BC=5

BC=-12

Area of ABC = 30cm2

Perimeter of ABC = AB+BC+AC

8 0

2 years ago

Need help answering this question, and 4 others that are on my page. Giving Points and Brainiest.

kari74 [83]

h(x) = -4

Step-by-step explanation:

Simple. Plugging this into the equation will give us:

h(x) = -14 -(-40)/4 = -14+10

h(x)= -4

8 0

2 years ago

Which statement is true? A. 6 > 6 B. –8 < –3 C. 5 < –6 D. –12 > –6

Soloha48 [4]

Answer:

Hello!

The statement that is true is B. -8 < -3.

Explanation:

Since negative three is closer to 0 and the positive side, it is greater than negative eight.

Try using a number line if you haven't already. You may find them very helpful. :)

6 0

2 years ago

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Work out the area of this triangle, stating the units of your answer.

DedPeter [7]

The area of the triangle is 27cm.

5 0

2 years ago