Make them have common denominators: -2/8 - 3/8 - 6/8 - 7/8 =
Now just do subtraction with numerators: -5/8 - 6/8 -7/8 = -11/8 - 7/8 = -18/8 =
Simplify: -9/4 =
Make it a mixed fraction: -2 1/4 (D)

5 0

4 years ago

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3. Show that the two triangles are congruent.

Oliga [24]

Answer:

Step-by-step explanation:

Line LP = Line ON

Line MP = Line MN

Line ML = Line MO

__ __

LP = ON

5 0

3 years ago

Brady tosses a coin three times. Each toss could be heads or tails. Which

Step2247 [10]

Answer:

Option B

Step-by-step explanation:

HHH → All heads

HHT → Two heads + one tail

HTH → Two heads + one tail

HTT → Two tails + one head

THH → One tail + two heads

THT → Two tails + one head

TTH → Two tails + one head

TTT → All tails

Therefore, At least two tails means → Sample space outcome with two tails Or all tails

Therefore, from the given options HTT is having two tails.

Option B is the correct option.

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3 years ago

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John davis, a manager of a supermarket, wants to estimate the proportion of customers who use food stamps at his store. he has n

8_murik_8 [283]

Answer:

1509

Step-by-step explanation:

We know that, formula for number of samples is,

$n= \frac{z^2 \times p \times q}{SE^2}$

When nothing is given, we take $p=0.5$ and we know that $q = 1-p=0.5$ .

SE = 0.03 (the true proportion should remain withing 3%)

Putting the values we get,

$n= \frac{(2.33)^2 \times 0.5 \times 0.5}{(0.03)^2}$

$n= \frac{5.4289 \times 0.5 \times 0.5}{0.03 \times 0.03} \approx 1509$

Therefore, the sample required to estimate the true proportion to within 3 percentage points is 1509.

7 0

4 years ago