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4 years ago

Simplify the expression below. (-3x^2 +2x -4) (4x^2 +5x -9)?

Mathematics

1 answer:

Veronika [31]4 years ago

6 0

The answer is X^2+7x-13

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Please help me the marks for the semester is tomorow

goldenfox [79]

Answer:

What do i do

Step-by-step explanation:

4 0

3 years ago

Don’t get this question , need some help thankssss

ss7ja [257]

Answer:

PQ = 37 Km

Step-by-step explanation:

let PQ = x , then

PR = x + 15 and QR = 3(x + 15) = 3x + 45

sum the parts and equate to 245

x + x + 15 + 3x + 45 = 245 , that is

5x + 60 = 245 ( subtract 60 from both sides )

5x = 185 ( divide both sides by 5 )

x = 37

then

PQ = x = 37 Km

3 0

3 years ago

Can someone help with question 1 please

allochka39001 [22]

Answer: B

Step-by-step explanation:

The answer is B because of the equal sign in the middle meaning that both the sin and cos are equal

4 0

2 years ago

Read 2 more answers

A concrete pillar has the shape of a cylinder. It has a diameter of 8 meters and a height of 9 meters. If concrete costs $87 per

Komok [63]

Answer:

Cost, C = $28410.72

Step-by-step explanation:

We have, a concrete pillar has the shape of a cylinder.

Diameter of pillar is 8 m and ts height is 9 m

If concrete costs $87 per cubic meter, it is required to find the concrete cost for the pillar. For this lets find the area of cylindrical shape. So,

$A=2\pi rh+2\pi r^2\\\\A=2\times 3.14\times 4\times 9+2\times 3.14\times 4^2\\\\A=326.56\ m^2$

The cost of pillar at the rate of $87 per cubic meter will be :

$C=326.56\times 87\\\\C=\$28410.72$

8 0

3 years ago

What is the value of n?

BARSIC [14]

Answer:

n=4

Step-by-step explanation:

7n-3n=16

4n=16

n=16/4

n=4

6 0

3 years ago