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4 years ago

What is 50 percent times 3 percent plus two plus 7 subtracted by 12?

Mathematics

2 answers:

olga2289 [7]4 years ago

6 0

.5 times .03= .015+2
=2.015+7=
9.015-12=
-2.985 or 298.5%

dezoksy [38]4 years ago

5 0

-2.985 is the answer.

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Please Help!!!<br> Due: Monday<br> On Ellipses - Pre Calc

eduard

25. <u>Step-by-step explanation:</u>

$\text{The general form of an ellipse is:}\dfrac{(x-h)^2}{a^2}+\dfrac{(y-k)^2}{b^2}=1\\\\\bullet \text{(h, k) is the Center}\\\bullet \text{a is the radius of x}\\\bullet \text{b is the radius of y}\\\bullet \text{the largest value between a and b is the major}\\\bullet \text{the smallest value between a and b is the minor}\\\bullet \text{the vertices are the (h, k) value plus the major (a or b) value}\\\bullet \text{the co-vertices are the (h, k) value plus the minor (a or b) value}\\\bullet \text{Length is the diameter}=2r\\$

$\dfrac{x^2}{16}+\dfrac{y^2}{25}=1\quad \text{can be rewritten as}\ \dfrac{(x-0)^2}{4^2}+\dfrac{(y-0)^2}{5^2}=1\\\\\bullet (h, k)=(0,0)\\\bullet a=4\\\bullet b=5\\\bullet \text{b is the largest value so: b is the major and a is the minor}\\\bullet \text{Vertices are }(0, 0+5)\ and\ (0, 0-5)\implies (0, 5)\ and\ (0, -5)\\\bullet \text{Co-vertices are }(0+4, 0)\ and\ (0-4, 0)\implies (4,0)\ and\ (-4,0)\\\bullet \text{Length of major is }2b:2(5)=10\\\bullet \text{Length of minor is }2a:2(4)=8$

To find the foci, first we must find the length of the foci using the formula:

$(r_{major})^2-(r_{minor})^2=c^2$

Then add the c-value to the h (or k)-value that represents the major.

b² - a² = c²

25 - 16 = c²

9 = c²

±3 = c

The center is (0, 0) and the major is the y-value so the foci is:

(0, 0+3) and (0, 0-3) ⇒ (0, 3) and (0, -3)

26. Answers

Follow the same steps as #25:

Center: (0, 0)

Vertices (7, 0) and (-7, 0)

Co-vertices: (0, 3) and (0, -3)

foci: (2√10, 0) and (-2√10, 0)

length of major: 14

length of minor: 6

5 0

3 years ago

-12=24+4b will give Brainly

Phantasy [73]

Answer:

-9 = b

Step-by-step explanation:

-12=24+4b

subtract 24 from both sides

-36 = 4b

divide both sides by 4 to get variable by itself

-9 = b

6 0

3 years ago

Read 2 more answers

If 168 chocolate chips weigh 5 1 4 ounces. How many chocolate chips are in an ounce?

saw5 [17]

Answer:

if 168 chocolate chips weighs 514 ounces then you would divide

514/168=3.220238095

so round to the nearest tenth and get 3.2

you get that there are 3.2 chocolate chips are in one ounce

Step-by-step explanation:

hope this helps and plz give brainiest

6 0

4 years ago

$250, at 3%, 3 years simple interest

Irina18 [472]

Answer:

Step-by-step explanation:$500.00 20-10%

6 0

3 years ago

A 2011 Gallup survey based on telephone and face-to-face interviews with 4,220 adults in China, aged 15 and older suggests that

Artemon [7]

Answer:

E. We are 95% confident that 27.8% to 32.2% of all Chinese adults smoke.

Step-by-step explanation:

x% confidence interval between a and b.

Interpretation: We are x% sure that the true value is between a and b.

In this question:

95% confidence level

30% with a margin of error of 2.2%.

30 - 2.2 = 27.8%

30 + 2.2 = 32.2%

So the correct answer is:

E. We are 95% confident that 27.8% to 32.2% of all Chinese adults smoke.

8 0

3 years ago