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DochEvi [55]
3 years ago
9

A student tries out for the track team and runs a lap in 45 seconds. The coach tells her she will have to cut her time by 50% to

make the team. How fast must she run a lap to make the team?
Mathematics
2 answers:
Fiesta28 [93]3 years ago
8 0
Cutting her time by 50% means reducing her time by half. Half of 45 seconds is 22.5 seconds. Therefore, to make the team, she must run a lap in 22.5 seconds.
Scrat [10]3 years ago
5 0

Answer:

Cutting her time by 50% means reducing her time by half. Half of 45 seconds is 22.5 seconds. Therefore, to make the team, she must run a lap in 22.5 seconds.

Step-by-step explanation:

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Let f(x) = cos(x). Use Addition or Subtraction Formulas to show the following.
uysha [10]

Answer:

First blank is cos(h)cos(x)

Second blank is sin(x)

Step-by-step explanation:

Look up the identity and apply it here

7 0
2 years ago
Solve the equation -4x^3=32
miss Akunina [59]

Answer:

-2

Step-by-step explanation:

-4x^3 = 32

x^3 = -8

take the cube root of both sides.

x = -2

6 0
2 years ago
Read 2 more answers
30 points if correct. Select all the are true.
ivann1987 [24]

Answer:

Options B,C and E are correct choices.

Step-by-step explanation:

We are asked to find correct answers for the given box and whisker plots.

Let us our options one by one.

A. This option is false as lowest value for children's cereals is 30 and highest value for adults is 35.

B. This option is correct. We can see our upper value for combined range will be 60 and lower value will be 5 and range is upper value- lower value.

60-5=55

C. Since we know that we can find spread of data by its range.

\text{Range for children's cereals}=60-30=30

\text{Range for adult's cereals}=60-30=30

So option C is correct indeed.

D. This options is false because for adults mean and median are different while for children mean and median are same.

E. We can see that median for children's cereals is 45 and it is about 12 for adults.

We can see that 12*3. So median amount of sugar in children's cereals is 3 times as much as the median amount of sugar in adult's cereals.

Therefore, options B,C and E are correct choices.


4 0
3 years ago
Needed help with this question!
In-s [12.5K]
A) is 2x
b) is x^{3}
c) is -2x

I think these are correct.
log_{10}1000^{x] = log_{10}10^{2x}=2x
I did similar things to get other answers
1000^{log_{10}x} = 10^{3log_{10}x}=10^{log_{10}x^{3}}=x^{3}
5 0
3 years ago
You gave the server at a restaurant a 22% tip and ended up paying $41.48. What was the price of your meal before you applied the
const2013 [10]

Answer: The price of meal before the tip = $34.

Step-by-step explanation:

Given : The percentage of tip = 22% = 0.22 ( we divide a percentage by 100 to convert it into decimal)

Total amount paid ( including tip) =  $41.48

Formula for Total bill = Price of meal + Tip amount , where Tip amount= 22% of Price of meal.

Let x be the price of meal, then

Total bill =x + 0.22 x (x )

⇒ $41.48= x(1+0.22)  [ By distributive property]

⇒ $41.48 = x (1.22)

⇒ x= ($41.48) ÷ 1.22

⇒ x= 34

Hence, the price of your meal before you applied the tip = $34.

7 0
3 years ago
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