which expression is equivalent to ? Assume .

Answer:

2. el numero contante por que se suma o resta

Answer:

F(x) = 2x^2 - 4x - 5

vertex? (1,-7)

range?

{y|y>=-7}

number of solutions?

Sorry I couldn’t find the answer, I hope this will do.

Answer:

11

Step-by-step explanation: 11 times 11 equals 121

Complete question :

The 100m dah times in the girl's track meet were normally distributed with a mean of 13 seconds and a standard deviation of 0.3 seconds.

Lana finished the race in 13.2 seconds . If 84 other girls ran in the event, approximately how many runners did she beat?

Answer:

21 runners

Step-by-step explanation:

Mean, μ = 13 seconds

Standard deviation, σ = 0.3

Lana's race time = 13.2

We find the proportion of runners who had race time above 13.2 ;

Proportion of who had race tune above 13.2

P(x > 13.2)

Obtain the Zscore

Zscore = (x - μ) / σ

Z = (13.2 - 13) / 0.3

Zscore = 0.2 / 0.3 = 0.6667

P(Z > 0.6667) = 0.25239 (Z probability calculator)

This is about 0.25239 * 100 = 25.24% = 25% (nearest percent)

Hence, Number of runners Lana beat = 25% of total runners ;

0.25 * 84 = 21

Hence, Lana beat about 21 runners

Answer:

C

Step-by-step explanation:

The central angle is equal to the arc that subtends it, that is 54°

area of sector = area of circle × fraction of circle

A = πr² × [tex]\frac{54}{360}[/tex]

   = π × 10² × [tex]\frac{3}{20}[/tex]

   = 100π × [tex]\frac{3}{20}[/tex] ( cancel 20 and 100 )

   = 5π × 3

   = 15π cm² → C

Answer:

10 visits

Step-by-step explanation:

John and Caleb want to make the high school basketball gym, so they are going to join a gym over the summer.

Let the number of visits be represented as: x

For John

John decided to go to Planet Fitness, which costs $30 to join, and $5 per visit.

The equation = $30 + $5 × x

= 30 + 5x

For Caleb

Caleb decided to go to Club4Fitness, which just charges $8 per visit.

The Equation = $8 × x

= 8x

We equate both equations to each other

30 + 5x = 8x

Collect like terms

30 = 8x - 5x

30 = 3x

x = 30/3

x = 10

Therefore, John and Caleb would spent the same amount of money after 10 visits.

Answer:

The mean is 70, that's all I know. Sorry!

Step-by-step explanation:

Here's how you find the mean:

1. Add together ALL NUMBERS. (which equals 560 in this case.)

2. DIVIDE by the amount of numbers there are. (So 560 ÷ 8 = 70)

3. There's your answer! The mean of these numbers is 70.

I really hope this helps! Have a great day\night!

can you understand? let me know in comment

Answer:

147 square yards

Step-by-step explanation:

Area = 21 x 14 x 1/2

Area = 294 x 1/2

Area = 147 yd ^ 2

Hope that helps! :)

-Aphrodite

Answer:

11

Step-by-step explanation:

I did the square root method.

hope this helps!

Answer:

38 is the maximum value

Step-by-step explanation:

First we should graph each inequality. Then we can find the points on the intersecting region and take those points and plug them into the equation P = 4x + 5y. Then we can find the maximum value from there. The maximum value is tied to the point (7, 2), with P = 38. :)

Answer: 50.24

Step-by-step explanation:

The equation to find the area of a circle is pi*r^2. First, r^2 is 4^2 which is 16.  Then times pi. Assuming pi in this case is 3.14, 3.14 times 16 is 50.24.

Answer:

ex2 = e4x+5 --> 5, -1

ln(x+5)=ln(x-1)+ln(x+1) --> 3

log(4)(5x^(2)+2)=log(4)(x+8) --> -1, 6/5

log(x-1)+log5x=2 --> 5

Step-by-step explanation:

None needed

Answer:

5/9m

Step-by-step explanation:

5/6 x 2/3

Answer:

a) 7, 10, 13, 16, ..., 34

Step-by-step explanation:

I'll only solve part a and you'll be able to do part b.

You're given:

3n+4

to find the first four terms, just plug in n = 1, 2, 3, 4 into n.

for n=1: 3(1)+4 = 7

for n=2: 3(2)+4 = 10

for n=3: 3(3)+4 = 13

for n=4: 3(4)+4 = 16

as you might guess, to find the 10th term, you plug in n=10.

for n=10: 3(10)+4 = 34

Answer:

t ≥ 10

Step-by-step explanation:

Since the student needs at least 10 hours of driving time, they need greater than or equal to 10 hours to pass.

2.4 cm

Step-by-step explanation:

10/4 = 6/x

x = width of reduced picture

24 = 10x (cross multiplication)

24/10 = x

2.4 = x

The width of the reduced picture is 2.4 cm.

Answer:

0.042

Step-by-step explanation:

Given :

p = 16% = 0.16

q = 1 - p = 1 - 0.16 = 0.84

Sample size, n = 75

The standard deviation of sampling distribution :

√(pq)/n

√(0.16 * 0.84) / 75

√0.1344 / 75

√0.001792

Standard deviation of sampling distribution = 0.0423320

Answer:

∠7=22°

Step-by-step explanation:

∠2 and ∠7 are supplementary angles, meaning they add to 90°.

∠2+∠7=90°

substitute ∠2

68°+∠7=90°

∠7=22°

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Answer:

No

0.5 ≠ 0.8

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Answer:

No, it is not.

Step-by-step explanation:

The reason is that if you simplified  4/8, you will get 1/2. When you simplified 8/10, you will get 4/5. 1/2 and 4/5 aren't the same number or equivalent to each other so the answer will be no.

Hope that helps. If you need help with anything, let MissAsker know :)!

Answer:

52.85

Step-by-step explanation:

perimeter of the rectangle is 40

perimeter of the half circle is 12.85

add those two together and get 52.85

MARK ME BRAINLIEST PLEASE

Answer:

AB=24

BC=32

AC=40

Step-by-step explanation:

Double means to multiply by 2 so do that for each side

AB=12*2=24

BC=16*2=32

AC=20*2=40

Answer:

correct

Step-by-step explanation:

don't change anything

Answer:

[tex] y = - 3 \\ \frac{4 + y}{4y} = \frac{4 + ( - 3)}{4( - 3)} = \frac{4 - 3}{ - 12} = \frac{ - 1}{12} [/tex]

Answer:

6.25 or 8 try those

Step-by-step explanation:

Answer:

Acute

Step-by-step explanation:

Answer:

I Think the answer might be C

Step-by-step explanation:

10-2=8

8+8=16

Answer:

q + d = 33  0.25q + 0.1d = 6 Option D

Step-by-step explanation:

The system of linear equation that can be used to find the number of quarters, q, and the number of dimes, d, Martin has is as follows:

q + d = 33

0.25q + 0.1d = 6

Martin has a combination of 33 quarters and dimes worth a total of $6.

Therefore,

q = number of quarters

d = number of dimes

0.1 dollars = 1 dime

0.25 dollars = 1 quarters

Therefore,

0.25q + 0.1d = 6

The quarters and dimes total 33. Therefore,

Therefore, the combined equation will be as follows:

q + d = 33

0.25q + 0.1d = 6

learn more on dimes and quarters here;https://brainly.com/question/3095346?referrer=searchResults