Simplify this expression fully: -2(a+3) - (7-a)​

Answer:

B) -7°c

Step-by-step explanation:

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Explanation:

The length of 17 cm and slanted length of 10 cm are not used at all. They are likely thrown in as a distraction.

Instead, we focus on the horizontal base of 10 cm and the vertical height of 9 cm. The base and height are always perpendicular to one another.

The area of the triangle is therefore...

area = base*height/2

area = 10*9/2

area = 90/2

area = 45 square cm

It doesn't matter that this triangle is obtuse, the same area formula applies to any triangle.

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A longer method would have you compute the area of the dashed triangle, and the area of the two combined triangles (the largest overall triangle). Subtracting the two would lead to the answer of 45 cm^2. You'll need the pythagorean theorem to find the base of the dashed triangle, which then helps find the base of the largest triangle overall as well. At this point is when the 17 and 10 come into play, but I find the first method is much easier.

Answer:

C. 50 [tex]cm^2[/tex]

Step-by-step explanation:

area of big triangle - area of small triangle

find missing side lengths with pythagorean theorem:

[tex]9^2 + b^2=10^2\\\\81+b^2=100\\\\b^2= 19\\\\b=\sqrt{19}\\[/tex]

[tex]10^2+b^2=17^2\\\\100+b^2=289\\\\b^2=189\\\\b=\sqrt{189}[/tex]

find area:

1/2(10)([tex]\sqrt{189}[/tex] ) - 1/2([tex]\sqrt{19}[/tex] )(9)

=   49.124

which is closest to 50 [tex]cm^2[/tex]

Answer:

yes

Step-by-step explanation:

Answer:

100

Step-by-step explanation:

because 1 x 100 = 100

Answer:

im confused too man

Step-by-step explanation:

Answer:

95%

Step-by-step explanation:

Current MEAN = 85 + 88 + 92 + 90/4 = 88.75 %

Lets assume needed score is 92%

Mean with assume needed score: 85 + 88 + 92 + 90 + 92/5 = 89.4%

Lets assume needed score is 93%

Mean with assume needed score: 85 + 88 + 92 + 90 + 93/5 = 89.6%

Lets assume needed score is 94%

Mean with assume needed score: 85 + 88 + 92 + 90 + 94/5 = 89.8%

Lets assume needed score is 95%

Mean with assume needed score: 85 + 88 + 92 + 90 + 95/5 = 90%

Answer:

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[tex]g = c - x \\ c - x = g \\ - x = g - c \\ x = - g - c[/tex]

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

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Answer:

x + 5 = 23

Step-by-step explanation:

Just write it like how you say it.

The algebraic expression for the given phrase is x+5=23.

In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.

The given phrase is "x plus five is twenty three"

Here, the equation is x+5=23

The solution of an equation is the set of all values that, when substituted for unknowns, make an equation true.

Transpose 5 to the RHS of the equation, we get

x=23-5

x=18

Therefore, the x value is 18.

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Answer:

5. h = 12

6. k = 17, m = 12

Step-by-step explanation:

5. The sum of angles on the adjacent side of a diagonal of a parallelogram is 180 degree

[tex]3h + 24 = 4 h + 12\\h = 12[/tex]

6. The  angle is 90 degrees

[tex]5k + 5 = 90\\k = 17\\7m + 6 = 90\\m = 12[/tex]

Answer:

3. 49

4. 101

Step-by-step explanation:

3) 180-51-63

= 66

180 - 66 = 44

4) 180 - 86-45 = 49

180 - 49 - 30 =101

Answer:

81 in

Step-by-step explanation:

diameter is radius squared

9 × 9 = 81

Answer:

We can compute simple interest by finding the interest rate percentage of the amount borrowed, then multiply by the number of years interest is earned. Another type of interest calculates interest on both the money initialy deposited as well as the interest money earned, and is called compound interest.

Step-by-step explanation:

hope this helps

Answer:

It's decreasing to the left and increasing to the right

Step-by-step explanation:

Answer: A. 36

B. 5:11

Step-by-step explanation:

(a)How many cold stone cones are sold?

Let the number of stone colds sold be represented by x.

Therefore, we can form an equation as:

11/9 = 44/x

Cross multiply

11 × x = 44 × 9

x = (44 × 9)/11

x = 36

The number of stone cold sold are 36.

(b)If the number of cold stone cones on the next day is reduced to 20.what is the new ratio?

The new ratio will be gotten as:

= 20/44

= 5/11

= 5:11

The ratio is 5:11

Answer:

AC ≈ 9.52 m

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos15° = [tex]\frac{BC}{AC}[/tex] = [tex]\frac{9.2}{AC}[/tex] ( multiply both sides by AC )

AC × cos15° = 9.2 ( divide both sides by cos15° )

AC = [tex]\frac{9.2}{cos15}[/tex] ≈ 9.52 m ( to 3 sf )

Answer:

74

Step-by-step explanation:

72 + 73 + 74 + 75 + 76 = 370

370 divided by 5 = 74

Hope this helps! Leave any questions or concerns in the comments! byeee <3

Answer:

Step-by-step explanation:

Abc

The required coordinate of the fourth vertex is (c, c).

Coordinate, is represented as the values on the x-axis and y-axis of the graph. while the coordinate x is called abscissa and the coordinate of the y is called ordinate.

here,
A rectangle has vertices (a,b), (c,b), and (a,c)
let the vertex of the first coordinate be [x, y],
Now,
for side a Corrdiante A (a, b) and B (c , b)
Now, coordinate the opposite side C(a, c) and D(x , y)

The coordinates of D must be equal to x coordinate of B and y ordinate of C so,
D(x, y) = D(c, c)

Thus, the required coordinate of the fourth vertex is (c, c).

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Answer:

Step-by-step explanation:

No, -0.25 represents a weak to moderate negative correlation.  On the other hand, -0.87 would represent a strong negative correlation.

Answer:

b. 0.37

Step-by-step explanation:

E2020!

Answer:

[tex]volume = 10\pi m^3[/tex]

Step-by-step explanation:

Volume of a prism = Base Area x height

Base is a quarter of a circle.

              [tex]Area \ of \ circle = \pi r^2\\\\r = 2m\\\\Area \ of \ quarter \ of \ a \ circle = \frac{1}{4} \pi r^2 = \frac{1}{4}\pi \times 4 = \pi m^2[/tex]

Base Area = π square meters.

Therefore ,

          [tex]Volume = Base Area \times height = \pi \times 10 = 10\pi m^3[/tex]

y=5×+630 that's question 1

the other question im not sure

Answer:

0.50 :)

Step-by-step explanation:

The probability of the union of being either a freshman or junior is 0.50

"Probability is a branch of mathematics which deals with finding out the likelihood of the occurrence of an event."

P(A) = n(A)/n(S)

where,  n(A) is the number of favorable outcomes,

n(S) is the total number of events in the sample space.

For given example,

Students have equal probabilities of being freshmen, sophomores, juniors, or seniors.

⇒ P(freshman) = 0.25

⇒ P(sophomores) = 0.25

⇒ P(juniors) = 0.25

⇒ P(seniors) = 0.25

We know for event A and B,

P(A ∪ B) = P(A) + P(B) - P(A ∩ B)

Assuming event A : student is a freshman

event B : student is junior

P(A) = 0.25

P(B) = 0.25

The number of students who are freshman as well as junior = 0

⇒ n(A ∩ B) = 0

⇒ P(A ∩ B) = 0

Now, the probability of the union of being either a freshman or junior would be,

⇒ P(A ∪ B) = P(A) + P(B) - P(A ∩ B)

⇒ P(A ∪ B) = 0.25 + 0.25 - 0

⇒ P(A ∪ B) = 0.50

Therefore, the probability of the union of being either a freshman or junior is 0.50

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Answer:

A≈263.89

Step-by-step explanation:

Solution

A=2πrh+2πr2=2·π·3·11+2·π·32≈263.89378

Answer:

4

Step-by-step explanation:

Answer: 3x=3

Step-by-step explanation: Let's divide this into parts--

1. Adding the x variables: -2x+5x or 5x-2x = 3x.

2. Adding the y variables: y-y or -y+y = 0. (The negative and the positive y cancel each other out.)

3. Adding the numbers: 8-5 or -5+8 = 3.

Now just put it back into an equation: 3x + 0 = 3.

We don't need to add the 0, so the equation changes into 3x = 3.

Answer:

9

Step-by-step explanation:

subtract 2 on both sides

you get v=9