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2 years ago

Simplify -2(3x+6) -4(x-5)

Mathematics

1 answer:

Mkey [24]2 years ago

3 0

-10x8

you distribute-2 through the parentheses & 4 too. Then you collect the like terms and calculate the sum.

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Which statements describe a parallelogram that must be a square? Select each correct answer.

Oxana [17]

That would be B, C and E.

A and D could be a rhombus.

8 0

2 years ago

Read 2 more answers

For a normal distribution with μ=500 and σ=100, what is the minimum score necessary to be in the top 60% of the distribution?

STatiana [176]

Answer:

475.

Step-by-step explanation:

We have been given that for a normal distribution with μ=500 and σ=100. We are asked to find the minimum score that is necessary to be in the top 60% of the distribution.

We will use z-score formula and normal distribution table to solve our given problem.

$z=\frac{x-\mu}{\sigma}$

Top 60% means greater than 40%.

Let us find z-score corresponding to normal score to 40% or 0.40.

Using normal distribution table, we got a z-score of $-0.25$ .

Upon substituting our given values in z-score formula, we will get:

$-0.25=\frac{x-500}{100}$

$-0.25*100=\frac{x-500}{100}*100$

$-25=x-500$

$-25+500=x-500+500$

$x=475$

Therefore, the minimum score necessary to be in the top 60% of the distribution is 475.

3 0

2 years ago

Help with this please lol

NeTakaya

Answer:

x = 107

Step-by-step explanation:

44+29+107=180

a triangle equals 180 with all the degrees added together :)

7 0

2 years ago

A market research group is interested in comparing the mean weight loss for two different popular diets. The researcher chooses

Degger [83]

Answer:

Step-by-step explanation:Jawo

5 0

2 years ago

10(4-7) What is the value of =(4-1) ? -10 - 6 6 10

blagie [28]

Answer 10

This is the formula of an arithmetic sequence.
a
n
=
a
1
+
d
(
n
−
1
)
a
n
=
a
1
+
d
(
n
-
1
)
Substitute in the values of
a
1
=
1
a
1
=
1
and
d
=
3
d
=
3
.
a
n
=
1
+
(
3
)
(
n
−
1
)
a
n
=
1
+
(
3
)
(
n
-
1
)
Simplify each term.
a
n
=
1
+
3
n
−
3
a
n
=
1
+
3
n
-
3
Subtract
3
3
from
1
1
.
a
n
=
3
n
−
2

4 0

3 years ago