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3 years ago

Add 238 and 12, then multiply by 3. Interpret the expression.

Mathematics

2 answers:

Volgvan3 years ago

4 0

Answer:

3(238+12) is the expression

Step-by-step explanation:

hope this helps

Luda [366]3 years ago

4 0

the way i interpreted this expression is 3(238+12)

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100 POINTS!!!!! WILL GIVE BRAINLIEST!!!!!!! Show that: (a + bi)^2 = (a + b)(a − b) + 2abi

inna [77]

Step-by-step explanation:

(a+bi)2

=a2 +2abi +b2i2

=a2 +2abi + b2. (-1)

=a2 -b2 +2abi

Answer = (a+b(a-b) +2abi

8 0

3 years ago

A fast food restaurant executive wishes to know how many fast food meals teenagers eat each week. They want to construct a 99% c

Lana71 [14]

Answer:

The minimum sample size required to create the specified confidence interval is 2229.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

What is the minimum sample size required to create the specified confidence interval

This is n when $M = 0.06, \sigma = 1.1$

$0.06 = 2.575*\frac{1.1}{\sqrt{n}}$

$0.06\sqrt{n} = 2.575*1.1$

$\sqrt{n} = \frac{2.575*1.1}{0.06}$

$(\sqrt{n})^{2} = (\frac{2.575*1.1}{0.06})^{2}$

$n = 2228.6$

Rounding up

The minimum sample size required to create the specified confidence interval is 2229.

7 0

3 years ago

in spencers garden the number of rose bushes is 7 less than 1.5 times the number of carnation bushes. If the number of carnation

Step2247 [10]

1.5 times the number of carnation bushes.
If the number of carnation bushes is c.
R = 1.5c - 7
Hope this helps:-)

7 0

3 years ago

Which angles are complementary to each other?

Oksi-84 [34.3K]

Answer:

All apply

Step-by-step explanation:

Complementary angles are ones that total 90°. Here, we have two pairs of congruent angles such that each pair totals 90°. We can mix and match to find pairs of complementary angles.

less than 45°: BGC and EGF

more than 45°: AGB and DGE

A complementary pair will consist of one angle from the first list and one angle from the second list. There are 4 possible pairings, and all are shown as answer choices.

All of the choices apply.

3 0

2 years ago

The product of the roots of the equation x2 + x=2 is: 0-2 01

gregori [183]

Answer:

-2

Step-by-step explanation:

x^2 + x=2

Subtract 2 from each side

x^2 + x-2=2-2

x^2 + x-2=0

Factor

What 2 numbers multiply to -2 and add to 1

2*-1 = -2

2+-1 =1

(x-1)(x+2)=0

Using the zero product property

x-1 = 0 x+2 = 0

x=1 x = -2

Product of the roots

1*-2 = -2

5 0

3 years ago