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nata0808 [166]
3 years ago
13

When Alyssa runs the 400 meter dash, her finishing times are normally distributed

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
7 0

Answer:

need more details

Step-by-step explanation:

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Solving Quadratic Equations posttest <br><br> A.<br> B.<br> C.<br> D.
beks73 [17]

Answer:

D. x = 3 \pm \sqrt{10}

Step-by-step explanation:

x^2 - 6x - 1 = 0

x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}

a = 1; b = -6; c = -1

x = \dfrac{-(-6) \pm \sqrt{(-6)^2 - 4(1)(-1)}}{2(1)}

x = \dfrac{6 \pm \sqrt{36 + 4}}{2}

x = \dfrac{6 \pm \sqrt{40}}{2}

x = \dfrac{6 \pm \sqrt{4 \times 10}}{2}

x = \dfrac{6 \pm 2 \sqrt{10}}{2}

x = 3 \pm \sqrt{10}

8 0
3 years ago
0.325 is _____ 100 percent.<br><br> less than<br><br> greater than<br><br> equal to
Liono4ka [1.6K]

Answer:

Option A is correct.

0.325 is less than 100 percent.

Step-by-step explanation:

Given: 0.325 is ____100 percent

Convert decimal into percent..

It is done by multiplying the decimal value by 100.

0.325 becomes

0.325 \times 100 = \frac{325}{1000} \times 100 = 32.5\%

32.5 % < 100 %

⇒ 32.5 %  is less than 100 %

Therefore, 0.325 is less than 100 percent.

3 0
3 years ago
Read 2 more answers
Bailey tried to prove that FGJ~FHI in the following figure, but her proof is wrong. What is the first mistake Bailey made in the
Andrei [34K]

The first mistake Bailey made was in the reason he gave for the first statement. he should have written: reflexive property.

<h3>What is the Reflexive Property of Congruence</h3>

The reflexive property of congruence states that an angle will always be equal or congruent to itself.

For example, given an angle, ∠B, therefore:

∠B ≅ ∠B

In the diagram given, based on the reflexive property of congruence, ∠F ≅ ∠F.

Therefore, the first mistake Bailey made was in the reason he gave for the first statement. he should have written: reflexive property.

Learn more about reflexive property of congruence on:

brainly.com/question/1527538

7 0
3 years ago
A triangle has one angle that is 46 degrees, another angle that is x+20 and another angle that is x, what is x?
Rudik [331]

Answer:

57

Step-by-step explanation:

180-46-20=114 114/2=57

8 0
3 years ago
Read 2 more answers
Find unit rate in miles per hour
lana [24]

Answer:

5.45 mph

4.54 mph

Step-by-step explanation:

8 ft/sec * 60 seconds/minute = 480 ft/minute

480 ft/minute * 60 minutes/hour = 28,800 ft/hr

28,800 ft/hr / 5280 ft/mil

20 ft/3 sec = 6.67 ft/sec

6.67 ft/sec * 60 seconds/minute = 400.2 ft/minute

400.2 ft/minute * 60 minutes/hour = 24,012 ft/hr

24,012 ft/hr / 5280 ft/mil = 4.54 mph

5 0
3 years ago
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