What is the lcm of 7 and 21​

Answer:

[tex]( - 0.5 , - 4.5 )[/tex]

Step-by-step explanation:

Rewrite the equation in vertex form.

Complete the square for

[tex]2 {x}^{2} + 2x - 4[/tex]

Use the form

[tex]a {x}^{2} + bx + c[/tex]

to find the values of a, b, and c.

a = 2

b = 2

c = −4

Consider the vertex form of a parabola.

[tex]a(x + d) ^{2} + e[/tex]

Find the value of d using the formula

[tex]d = \frac{b}{2a} [/tex]

[tex]d = \frac{1}{2} [/tex]

Find the value of e using the formula

[tex]e = c - \frac{ {b}^{2} }{4a} [/tex]

[tex]e = - \frac{9}{2} [/tex]

Substitute the values of a, d, and e into the vertex form

[tex]2(x + \frac{1}{2} ) ^{2} - \frac{9}{2} [/tex]

Set y equal to the new right side.

[tex]y = {2(x + \frac{1}{2}) }^{2} - \frac{9}{2} [/tex]

Use the vertex form, 

[tex]y = a(x - h) ^{2} + k[/tex]

to determine the values of a, h, and k.

a = 2

h = -1/2

k = -9/2

Find the vertex (h,k).

[tex]( - \frac{1}{2} , - \frac{9}{2} )[/tex]

Answer:

the pic is hard to see...

Answer:

[tex]part \: a. \\ ans \: is \: x = log_{2}( \frac{5000}{300} )[/tex]

[tex]part \: b. \\ ans \: is \: x = log_{2}( \frac{50}{3} ) = 4.1 \: min[/tex]

Answer:

7

Step-by-step explanation:

Find (h°g)(0) can also be expressed as h(g(0)).  Begin by calculating g(0).  To evaluate the function g at 0, replace each x with 0.  g(0) = (0)²-7(0).  (0)²-7(0) is equal to 0 so now 0 becomes the input for h.  Evaluate h(0) by replacing each x with 0 in the h function.  h(0) = 7 - 4 (0)² = 7 - 0 = 7.

Answer:

The answer is 80, give me brainliest answer:)

A correlation coefficient of -0.975 on a linear regression indicates: D. One variable has a strong relationship with the other.

Correlation coefficient, r, is a measure of how strong the relationship between two variables is.

A correlation coefficient, r, that is closer to 1 or -1 signifies a strong relationship between two variables and vice versa.

Therefore, a correlation coefficient of -0.975 on a linear regression indicates: D. One variable has a strong relationship with the other.

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Answer:56

Step-by-step explanation: Since there are 1344 baseballs and 24 baseballs in each carton. You divide 1344 by 24 and get 56.

Hope I helped! :)

Answer:

A. Yes

Step-by-step explanation:

Hi there!

We are given the equation of the line [tex]y=\frac{1}{7}x-4[/tex], and we want to see if the point (7, -3) is on that line.

If the point is on the line, then it means that the point is a solution to the equation, meaning that if we plug its values into the equation, it will make a true statement.

This is because a line is made up of an infinite number of points, and they go on forever (there are no endpoints on a line), and so many, many points will belong to that line. The equation of the line simply shows how we can manipulate x and y to find points that belong to that line.

Anyway, in order to figure out if the point is a solution to the equation, we can substitute its values into the equation and see if the statement it makes is true or not

So substitute 7 as x and y as -3

[tex]-3=\frac{1}{7} (7)-4[/tex]

Multiply

-3=1-4

Simplify

-3=-3

This is an identity, which is true.

Therefore, the answer is A, which would be yes.

Hope this helps!

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Answer:

f is a function because each student, or each element of the domain, corresponds to one element of range.

Step-by-step explanation:

function is each input has one output. input is domain, output is range

Answer:

[tex]Bag \: A, \: 6 \: kg \: for \: \$4.14 \: : is \: the \: better - value.[/tex]

Step-by-step explanation:

[tex]at \: the \: rate \: of \: 6 kg \: for \: \$4.14 \\ 2.5kg \: will \: cost \to \\ \frac{2.5 \times 4.14}{6} = 1.725 \\ hence \: \$1.725 \: is \: less \: than \: \$1.80 \\ therefore \: the \: first \: bag \: has \: \\ the \: better \: value.[/tex]

♨Rage♨

Answer:

a cross section

Step-by-step explanation:

duhh who did not know that

Answer:

f=21

Step-by-step explanation:

The equation you could write is -4f=-84. Solving this (dividing by -4 on both sides), your answer is that f=21.

Answer:

f = 21

Step-by-step explanation:

Hope this helps!

I tried to write an explanation but it wouldn't let me for some reason

Answer: the answer is number 4

Step-by-step explanation:44444

\444444444444444444444

Answer: its the third one

Step-by-step explanation: im preety sure thats it

Answer:

48

Step-by-step explanation:

878.24 - 399. 2 = 479.04

479.04 / 9.98 = 48

Answer:

i think people do that so the products don't get destroyed. like, you wouldn't put bread and canned foods in the same bag. or maybe it's to organize them by category, etc. so when you get home to put up the groceries, they're all in the same place. like all the fridge items are in this bag. i don't know honestly. just my opinion.

Step-by-step explanation:

hope it helps?

B. Correct

Hi there !

27 : 6 = 4 r3

27 = 6×4 + r3

27 = 24 + 3

27 = 27

(correct)

Good luck !

The surface area of the cylinder after dilation is: 36 units².

Surface area of a cylinder = 2πrh + 2πr²

Find the surface area of the cylinder before dilation:

Surface area = 2πrh + 2πr² = 2(π)(9)(9) + 2(π)(9²)

Surface area = 324π units²

Surface area of the cylinder after dilation = 324π × (1/3)²

= 324π × 1/9

= 36 units²

Thus, the surface area of the cylinder after dilation is: 36 units².

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Answer:

$185,000

Step-by-step explanation:

29600 / 16 = 1850 (which is 1%)....1850 X 100% = $185,000.

Answer:

r = 2/3p

A trail mix recipe asks for 4 cups of raisins for every 6 cups of peanuts.

There is proportional relationship between the amount of raisins, r (cups), and the amount of peanuts, p (cups), in this recipe.

The ratio of raisins and peanuts = 4:6  or 2:3

It would be same for every mixture.

If r cups of raisins and p cups of peanuts then their mixture ratio is r:p

Step-by-step explanation:

pls heart and give brainliest

The equation where the constant of proportionality is greater than 1 is [tex]\mathbf{p = 1.5r}[/tex], and the equation where the constant of proportionality is less than 1 is [tex]\mathbf{r = 0.67p}[/tex]

(a) Constant of proportionality greater than 1

Represent peanuts with p, and raisins with r.

So, the ratio is given as:

[tex]\mathbf{p : r = 6 : 4}[/tex]

Express as fraction

[tex]\mathbf{\frac pr = \frac 64}[/tex]

Multiply both sides by r

[tex]\mathbf{p = \frac 64r}[/tex]

[tex]\mathbf{p = 1.5r}[/tex]

(b) Constant of proportionality less than 1

In (a), we have:

[tex]\mathbf{p = 1.5r}[/tex]

Divide both sides by 1.5

[tex]\mathbf{r = \frac{1}{1.5}p}[/tex]

[tex]\mathbf{r = 0.67p}[/tex]

The graphs of [tex]\mathbf{p = 1.5r}[/tex] and [tex]\mathbf{r = 0.67p}[/tex] are the same.

See attachment for the required graph

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Answer:

40

Step-by-step explanation:

Any regular polygon has exterior angles  = to 360 / number of sides.

so a 9-gon has 9 sides. The exterior angle = 360 / 9 = 40

Each exterior angle will be 40 degrees.

Try it with simpler n-gons. A triangle has 3 sides. The exterior angle is 360 / 3 = 120

A square has 4 sides. Each exterior angle is 360 / 4 = 90

Answer:

3628800

Step-by-step explanation:

The product of the numbers 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 is 3,628,800.

1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10

Step 1: Multiply 1 by 2:

1 x 2 = 2

Step 2: Multiply the result by 3:

2 x 3 = 6

Step 3: Multiply the result by 4:

6 x 4 = 24

Step 4: Multiply the result by 5:

24 x 5 = 120

Step 5: Multiply the result by 6:

120 x 6 = 720

Step 6: Multiply the result by 7:

720 x 7 = 5040

Step 7: Multiply the result by 8:

5040 x 8 = 40,320

Step 8: Multiply the result by 9:

40,320 x 9 = 362,880

Step 9: Multiply the result by 10:

362,880 x 10 = 3,628,800

Therefore, the product of the numbers 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 is 3,628,800.

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Answer:

1/4

Step-by-step explanation:

quartered pie

Answer:

1/4

Step-by-step explanation:

there's four total triangles and only one is shaded purple. that is one of the four triangles.

Answer:

1. put an open circle going left on 4

2.put a closed circle going right on 1

3.put a closed circle going left from -5

4.put an open circle going right at 10

Step-by-step explanation:

I am learning this right now in  math class

Answer:

-1.6666......   ( -1.6 recurring)

Step-by-step explanation:

      1.666     <  Quotient

      ------------------------------

3 ) 5.000

    3 0

     20

     18

       20

       18

         20

         18

The 6 is recurring so the answer is 1,666..... * -1 = -1.666.....

Answer:

2.25 pies

Step-by-step explanation:

8/4 = 2

1/4 = 0.25

2+0.25=2.25

or

9/4 = 2.25

Answer:

a=110 b=35 c= 10 d=55 e=14 f=10

Step-by-step explanation:

a = 11c , 180-70=110

b=2*35 =70

c= 11*10=110

2d=110 , d=55

e=5*14=70

7f=70 , f=10

Answer: C and D

Step-by-step explanation:

We need to find all the figures that are rhombuses. These figures are C and D.

The quadrilaterals C and D are those for which the diagonals cross at right angles.

Quadrilateral are closed geometrical shapes having four sides, four angles and four vertices. Some of the common quadrilaterals include rectangles, square, parallelogram and the rhombus.

Interior angles of any type of quadrilateral always sums up to 360°.

Diagonals of a quadrilateral is the straight line formed by joining opposite vertices.

For every quadrilateral, there are two diagonals.

Figure A is a rectangle. The diagonals of a rectangle bisects each other, but is not perpendicular bisector. This means that diagonals of figure A does not cross at right angles.

Figure B is a parallelogram. Properties of diagonals are almost same in rectangles and quadrilateral. Diagonals bisect each other, but is not perpendicular. So diagonals of figure B also does not cross at right angles.

Figure C is rhombus. Diagonals of a rhombus perpendicularly bisect each other. Therefore diagonals of figure C cross at right angles.

Figure D is square. Again the diagonals of a square perpendicularly bisect each other. Therefore diagonals of figure D cross at right angles.

Hence diagonals of figures C and D cross at right angles.

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