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Cerrena [4.2K]
2 years ago
9

Please help me and tysm!​

Mathematics
1 answer:
Mrac [35]2 years ago
5 0

Answer:

200

Step-by-step explanation:

156.7

since the number before the hundred is more than 4

it becomes 200

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Nathaniel can text 72 words in 3 minutes. At this rate, how many minutes would it take him to text 144 words?
notsponge [240]

it would take 6 min to type 144 words

Step-by-step explanation:

72/144 = 3/6

3 0
2 years ago
a playground area is going to be built in a zoo park. the shape of the playground is shown below. this are will be covered with
Triss [41]

3+3+12+32=50

50x52.59=2,629.5

5 0
3 years ago
What is the axis of symmetry of the function f(x) = –(x + 9)(x – 21)?
ludmilkaskok [199]
First, we have to realize that this is factored form, so we have to put this in standard quadratic form using FOIL, which is a rule mandating how we multiply the numbers here. F stands for First, which means the first number inside the parentheses for both of them, then O means the first number in the first quantity(fancy word for parentheses) multiplied by the last number of the second quantity, and so forth. When you are done, you combine like terms

anyway, you end up with x²-12x-189, but you have to inverse all numbers because of the parentheses in front, so it becomes -x²+12x+189.

Now you can find the axis of symmetry uisng the equation -b=2a (oh yeah, I forgot to mention: the standard quadratic form is a(x)²+b(x)+c already). So you do -12 / -2, which then becomes 6.

The axis of symmetry is 6
3 0
3 years ago
The maximum land speed of a cheetah is about 120km/hour.
andreyandreev [35.5K]

Answer:

  33 m/s

Step-by-step explanation:

  120 km/h × (1 h)/(3600 s) × (1000 m)/(1 km) ≈ 33 m/s

_____

<em>Additional comment</em>

In general, units conversion is done by multiplying by a factor whose numerator and denominator have equal values, but different units. The units in that fraction need to be arranged to cancel the units you don't want and leave the units you do want.

8 0
2 years ago
What is the equation of the line which has a gradient of 2 and passes through the point (1,4)
timofeeve [1]

Answer:

Y= 2x+2

Step-by-step explanation:

line equation is y=mx +c


m is the gradient = 2

We are given an x and y value

X= 1
y= 4


substitute that into the equation:

4= 2(1) +c

2=c


Put all the equation together:

Y= 2x+2

5 0
2 years ago
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