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3 years ago

Distributive property of 1/2(8x+2)

Mathematics

1 answer:

sdas [7]3 years ago

5 0

Answer:

4x+1

Step-by-step explanation:

1/2 *(8x+2)=1/2*8x+1/2*2=4x+1

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There are 75 boys, 60 girls and 15 teachers at a kindergarten.

zalisa [80]

Answer:

boys:girls:teachers

5 : 4 :1

Step-by-step explanation:

75 boys, 60 girls and 15 teachers

boys:girls:teachers

75 : 60 :15

Divide each term by 15

75 /15 : 60/15 :15/15

5 : 4 :1

5 0

3 years ago

Will give Branliest!!!<br> whitch inequality is true?<br><br> A) 2pi-1≤5<br> B) pi+8≤11

Tasya [4]

Neither, the first one is greater than 5 and so is 11

8 0

3 years ago

One variable examined is the survival rate 10 years after tagging. The scientists observed that 10 of the 50 metal tagged pengui

Oksana_A [137]

Answer: 90% confidence interval would be $(-0.2483,-0.0717)$

Step-by-step explanation:

Since we have given that

n₁ = 50

Number of metal tagged penguins survived = 10

So, $p_m=\dfrac{10}{50}=0.2$

n₂ = 50

Number of electronic tagged penguins = 18

So, $p_e=\dfrac{18}{50}=0.36$

So, at 90% confidence interval, z = 1.28

So, interval would be

$(p_m-p_e)\pm z\sqrt{\dfrac{p_m(1-p_m)}{n}+\dfrac{p_e(1-p_e)}{n}}\\\\=(0.2-0.36)\pm 1.28\sqrt{\dfrac{0.2\times 0.8}{50}+\dfrac{0.36\times 0.64}{50}}\\\\=-0.16\pm 0.0883\\\\=(-0.16-0.0883,-0.16+0.0883)\\\\=(-0.2483,-0.0717)$

Hence, 90% confidence interval would be

$(-0.2483,-0.0717)$

6 0

3 years ago

Evaluate 8a-1+0.5b8a−1+0.5b8, a, minus, 1, plus, 0, point, 5, b when a=\dfrac14a=

professor190 [17]

Answer: $6$

Step-by-step explanation:

Given the following expression:

$8a-1+0.5b$

You need to substitute the given values of "a" and "b" into the expression. Notice that these values are:

$a=\frac{1}{4}\\\\b=10$

Then;

$8a-1+0.5b=8(\frac{1}{4})-1+0.5(10)$

Now you must solve the multiplications:

$=\frac{8}{4}-1+5=2-1+5$

The final step is to add the numbers. Therefore, you get the following answer:

$=6$

7 0

3 years ago

Read 2 more answers

A random selection will be made from a bag containing different colored marbles. Of the 20 marbles in the bag, 1 is yellow.

klemol [59]

Answer:

1/20

highly unlikely

Step-by-step explanation:

P(yellow) = yellow marbles / total

=1/20

It is _highly unlikely -- that a yellow marble will be randomly selected from the bag

6 0

3 years ago