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3 years ago

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Mathematics

1 answer:

adoni [48]3 years ago

6 0

Answer:

P = 1,-10

Q=1,-1

R=7,-1

S=7,-10

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What is the answer to 2x^2 - 3x - 15 = 5

Alja [10]

2x²-3x-15=5
2x²-3x-15-5=0
2x²-3x-20=0
½(2x+5)(2x-8)

-2x=-5
x=-5/2

2x-8=0
2x=8
x=4

---------------------------

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4 years ago

At 5 seconds, an object's velocity is 9 meters per second. At 8 seconds, the object's velocity is 25 meters per second. Assuming

ivanzaharov [21]

The formula for acceleration is (∆v)/(∆t), or (final velocity - initial velocity)/(final time - initial time). If you input your values the problem would work out as followed:

A = <span>(∆v)/(∆t)
A = (25-9)/(8-5)
A = 16/3
A = 21.33 (rounded to the nearest hundredth)</span>

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3 years ago

If Julie needs 3 1/4 cups of oatmeal , how many 1/4 cups of oatmeal will she use?

alekssr [168]

Shell use 13 cups of oatmeal

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3 years ago

1 point

Rus_ich [418]

Answer:

15 CM I THINK

Step-by-step explanation:

OK itried brainly

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3 years ago

State the null and alternative hypotheses to test if the population represented by Sample 1 has a mean that is 2.0 units higher

avanturin [10]

Answer:

Null Hypothesis, $H_0$ : $\mu_A-\mu_B$ = 2.0 units or $\mu_D$ = 2.0 units

Alternate Hypothesis, $H_A$ : $\mu_A-\mu_B\neq$ 2.0 units or $\mu_D\neq$ 2.0 units

Step-by-step explanation:

We are given the following data below and we have test if the population represented by Sample 1 has a mean that is 2.0 units higher than the population represented by Sample 2;

Pair : 1 2 3 4 5 6 7

Sample1 : 5 6 10 3 6 7 8

Sample2 : 4 4 3 5 5 5 3

Let $\mu_A$ = population mean represented by Sample 1

$\mu_B$ = population mean represented by Sample 2

$\mu_D$ = population mean matched-pair differences for Sample 1 - Sample 2

So, Null Hypothesis, $H_0$ : $\mu_A-\mu_B$ = 2.0 units or $\mu_D$ = 2.0 units

Alternate Hypothesis, $H_A$ : $\mu_A-\mu_B\neq$ 2.0 units or $\mu_D\neq$ 2.0 units

Here null hypothesis states that the population represented by Sample 1 has a mean that is 2.0 units higher than the population represented by Sample 2.

On the other hand, alternate hypothesis states that the population represented by Sample 1 has a mean that is not 2.0 units higher than the population represented by Sample 2.

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4 years ago