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4 years ago

How many times does the graph of the function below intersect or touch the x-axis? y=-3x^2+x+4 ...?

2 answers:

8 0

when the graph touches x axis at that point y = 0

 So, putting y =0
0 = -3x^2 + x +4
so, if you factoriazte it

−3x^2++4x−3x+4=0

 −3x(x+1)+4(x+1)=0

 (x+1)+(−3x+4)=0

 x=−1,4/3

So, two time at -1 and 4/3 it touches the x-axid

Nana76 [90]4 years ago

6 0

Answer:

The answer is 2 times.

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A circular city plaza is surrounded by a row of bricks. The area of the plaza is 1,520 square meters. How long is the row of bri

Korolek [52]

Answer:

138 meters

Step-by-step explanation:

step 1

Find the radius of the circular city plaza

The area is equal to

$A=\pi r^{2}$

we have

$A=1,520\ m^2$

$\pi =3.14$

substitute

$1,520=(3.14)r^{2}$

solve for r

$r^2=1,520/3.14\\r=22\ m$

step 2

we know that

To find out how long is the row of bricks, determine the circumference of the circular city plaza

The circumference is equal to

$C=2\pi r$

we have

$r=22\ m$

$\pi =3.14$

substitute

$C=2(3.14)(22)=138\ m$

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4 years ago

Given an angle that is 120°, find m3. * O 60 O 100 O 120*

lozanna [386]

Answer:

m3 is 60 degrees

Step-by-step explanation:

Angles 1 & 3 are complementary angles. What that means is that the two angles equal 180 degrees. We already have 120 degrees with m1, so subtract that from 180 for 60 degrees.

8 0

3 years ago

Read 2 more answers

Simplify: 8+(-13)-18=

Nuetrik [128]

Answer:

-23

Step-by-step explanation:

You combine the numbers

8+(-13)-18=

add 8 to -13

-5

add -18 to -5

-23

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3 years ago

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What is the percent if 780 students likes berry blast and only 220 students prefer melon splash

fenix001 [56]

78% I think atleast.

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4 years ago

-2x+9y=5 when x equals 11

dimaraw [331]

You would multiply -2 by 11 and get -22. Next your equation would equal to -22+9y=5. You simply subtract -22 from both sides, which basically means you're adding 22. Next your equation would be 9y=27. All that is left to do is divide both sides by 9, and you get that y is equal to 3.

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4 years ago