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2 years ago

Simplify. Write your answer in standard form.(4x^3+6x−7)+(3x^3−5x^2−5x+9)

Mathematics

1 answer:

UkoKoshka [18]2 years ago

3 0

answer: 7x^ - 5x^2 + x + 2

step-by-step explanation: i think thats it

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How many squares make up the surface of a cube

vazorg [7]

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Step-by-step explanation:

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3 years ago

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On a bicycle trail, the city is painting arrows like the one shown below: Upper pointing arrow with height of 15 and length of 1

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229.5 $cm^{2}$

Step-by-step explanation:

In order to calculate the area of the arrow we need to calculate the area of the body of the arrow, and then the head of the arrow. The body of the arrow is a rectangle meaning that the area (Ar) can be calculated by multiplying the length by the height like so...

Ar = l * h

Ar = 11cm * 12cm

Ar = 132 $cm^{2}$

Now we need to find the area of the head of the arrow, which is a triangle and therefore we can use the formula for the area of a triangle (At) which is height times base divided by 2...

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At = 97.5 $cm^{2}$

Now we simply add both areas together to calculate the total area of the arrow...

132 $cm^{2}$ + 97.5 $cm^{2}$ = 229.5 $cm^{2}$

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3 years ago

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The left and right page number of an open book are two consecutive integers whose sum is 275 find these page numbers

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X= first number x+1= second number 2x+1=275 2x=274 x+274 x=137 first number 137+1=138 second number

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3 years ago

Simplify the expression -2x^2(4x − 3). -8x3 − 6x2 -8x3 + 6x2 8x3 − 6x2 8x3 + 6x2

Digiron [165]

To simplify the expression we are going to use the distributive property of multiplication: $a(b+c)=ab+ac$ .
We can infer from our problem that $a=-2x^2$ , $b=4x$ , and $c=-3$ . So lets apply the property to simplify our expression:
$-2x^2(4x-3)=(-2x^2)(4x)+(-2x^2)(-3)$
$(-2x^2)(4x)+(-2x^2)(-3)=-8x^3+6x^2$

We can conclude that the correct answer is -8x3 + 6x2

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3 years ago

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Solnce55 [7]

Answer:

13 caramel I think you just put it in the question

Step-by-step explanation:

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3 years ago