It would really help if someone could tell me the answers for those questions

Answer:

the answer is C

Step-by-step explanation:

it it can be calculated by using simple quadratic formula

Answer:

254 cm²

Step-by-step explanation:

Calculate first  the total area

A = 30*20 = 600 cm²

Then calculate the area of the cercle

A= 10.5²*π = 346.36≈346 cm²

Then substract the area of the circle from the total one:

600-346= 254 cm²

Answer:

  no

Step-by-step explanation:

The product of -2 and 1 is -2, which is not less than -2. Blaine's conjecture fails if the positive integer is 1.

Answer:

41.67hrs

Step-by-step explanation:

if the snail moves 0.12km in 1hr

the snail will move 5km in Xhrs

0.12 × X = 5 × 1

0.12X= 5

X= 5/0.12 = 41.67hrs

Answer:

41.76 hours

Step-by-step explanation:

I feel bad so i did the math. Good Luck! hope you get it right!

Step-by-step explanation:

x+y=12-----1

xt=32-----2

from 1,

x=12-y-----3

sub 3 into 2

(12-y) y=32

12y-y²=32

y²-12y+32=0

(y-8)(y-4)=0"factorise"

y=8,y=4

sub y =8 into 1,

x+8=12

x=4

sub y =4 into 1

x+4=12

x=8

conclusion,

when x=4,then y=8

when x=8,theb y =4

Answer:

x = 4, y = 8 or x = 8, y = 4

Step-by-step explanation:

Given the 2 equations

x + y = 12 → (1)

xy = 32 → (2)

From 2

y = [tex]\frac{32}{x}[/tex]

Substitute y = [tex]\frac{32}{x}[/tex] into (1)

x + [tex]\frac{32}{x}[/tex] = 12 ( multiply through by x )

x² + 32 = 12x ( subtract 12x from both sides )

x² - 12x + 32 = 0 ← in standard form

(x - 4)(x - 8) = 0 ← in factored form

Equate each factor to zero and solve for x

x - 4 = 0 ⇒ x = 4

x - 8 = 0 ⇒ x = 8

Substitute these values into (1) for corresponding values of y

x = 4  : 4 + y = 12 ⇒ y = 8

x = 8 : 8 + 4 = 12 ⇒ y = 4

Answer:

290 m³

Step-by-step explanation:

Volume of the composite figure can be calculated by using the formula for volume of a rectangular prism to calculate, separately, the volume of the top prism, then volume of the prism beneath, before summing both volumes together.

Volume of rectangular prism = width (w) × height (h) × length (l)

==>The prism on top has:

l = 3m

w = 8-3 = 5m

h = 6m

Volume (V1) = 3*5*6 = 90m³

==>The prism beneath has:

l = 8m

w = 5m

h = 5m

Volume (V2) = 8*5*5 = 200m³

Volume of the composite figure = V1 + V2 = 90+200 = 290 m³

the answer is 2. see attached for step-by-step instructions. hope that helps!

Answer:

The answer is option A.

∆BDC is a right angled triangle

Angles in a triangle add up to 180°

That's

z + 35 + 90 = 180°

z = 180 - 35 - 90

z = 55°

Alternate angles are equal

Angle DBC = Angle BDA

That's

35 = 7y

Divide both sides by 7

y = 5

y = 5 z = 55

Hope this helps you

Answer:

A. I and II, only

Step-by-step explanation:

y = x

Switch variables.

x = y

y = 1/x

Switch variables.

x = 1/y

1/x = y

y = x²

Switch variables.

x = y²

±√x = y

y = x³

Switch variables.

x = y³

∛x = y

Answer:

X will be equal to 36 degrees.

Step-by-step explanation:

A full angle of a pentagon is 108 degrees. A line connecting from a base corner to on the opposite side splits the pentagon into a rhombus and a triangle. In the triangle, two corners will be the same side, while the largest corner will be 108 degrees.

180-108 = 72

72 / 2 = 36

Therefore, x is equal to 36 degrees.

Hopefully this helps :)

Answer:

4

Step-by-step explanation:

First we need to find the difference by subtracting. 49-13 = 36

Then we fine one-ninth of 36. We do this by dividing 36 by 9

36 divided by 9 is 4.

Answer:

47.5

Step-by-step explanation:

just took the test

The measure of angle EFD is 47.5°

An inscribed angle is an angle whose vertex lies on the circumference of a circle while its two sides are chords of the same circle. The arc formed by the inscribed angle is called the intercepted arc.

Given is a circle C, with an arc ED measuring 95°, we need to find the measure of the inscribed angle ∠EFD,

So,

we know that the arc formed by the central angle is equal to is measure.

∴ arc ED = ∠ECD

∠ECD = 95°

Now,

According to the central angle theorem the angle subtended by an arc length at the center of the circle is double the angle subtended at any point on the circumference of the circle.

therefore,

∠ECD/2 = ∠EFD

∠EFD = 95/2

∠EFD = 47.5°

Hence the measure of angle EFD is 47.5°

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Answer:

y = 4/5x

Step-by-step explanation:

We have a slope of 4/5 and a point of (0,0)

Using the slope intercept form of a line

y = mx+b

y = 4/5 x +b

Substituting the point into the equation

0 = -1/2(0) +b

0 = 0+b

0 = b

The equation of the line is

y = 4/5x+0

Answer:

[tex]\frac{17}{13}[/tex]

Step-by-step explanation:

Given

tan x = [tex]\frac{5}{12}[/tex] = [tex]\frac{opposite}{adjacent}[/tex]

5 and 12 are the legs of a 5- 12- 13 right triangle with hypotenuse 13, thus

sin x = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{5}{13}[/tex]

cos x = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{12}{13}[/tex]

Thus

sin x + cos x = [tex]\frac{5}{13}[/tex] + [tex]\frac{12}{13}[/tex] = [tex]\frac{17}{13}[/tex]

Step-by-step explanation:

2.(a) uniform speed = distance/ time

= ( 9×16) / 9

= 16 m/s

(b) 19-10 = 9s

(c) 16×9 = 144m

(d) rate of change of speed

= (v-u)/ t

= ( 7-16)/ 6

= -3/2 m/s²

3.(a) uniform speed = distance/ time

= ( 12×20 ) / 12

= 20 m/s

(b) 22-10 = 12s

(c) (12×20) + 1/2(20+60)(18)

= 240+720

= 960m

(d) acceleration

= (v-u)/ t

= ( 60-20 ) / 18

= 20/9 m/² or 2.22 m/s²

Answer:

V = [tex]\frac{3.14r^3}{12}[/tex]

Step-by-step explanation:

Volume of Cone = [tex]\pi r^2 \frac{h}{3}[/tex]

But, Given that radius of cone = r/2 of the cylinder

And,

Height of cone = Radius of cylinder i.e. h = r

Putting this in the above formula.

=> V = [tex]\pi (\frac{r}{2} )^2 (\frac{r}{3})[/tex]

=> V = [tex](3.14)(\frac{r^2}{4} )(\frac{r}{3} )[/tex]

=> V = [tex]\frac{3.14r^3}{12}[/tex]

Answer:

(1/12) Pi r^3     option C on plato

Step-by-step explanation:

r = radius of the cylinder

V = (1/3)Pi c^2 h for a cone.

and c = r/2 and h = u

so Volume of the cone is (1/12) Pi r^3

The radius goes from the center to the edge of the circle.

The diameter is twice as long as the radius; it is a segment going through the center with both endpoints on the circle

The circumference is the distance around the circle. Think of it as the perimeter of the circle.

Answer: n=6

Step-by-step explanation:

To solve this proportion, you solve this as you would any proportion. You would have to first cross multiply.

[tex]\frac{1}{5}(15)=\frac{1}{2}n[/tex]

[tex]3=\frac{1}2}n[/tex]                  [multiply both sides by 2]

[tex]n=6[/tex]

Answer:

√3 * 5 = 5√3 cm

Step-by-step explanation:

→ ABCDEFGH is a cube.

→ CF = Diagonal of cube.

→ CH = Diagonal of Base Face BCDH.

→ Let the side of Each cube = a.

Than,

in Right ∆CFH, By Pythagoras Theoram, we have,

→ CH² + FH² = CF² --------- Equation (1)

and, Similarly, in Right ∆CDH ,

→ CD² + DH² = CH² ------- Equation (2).

Putting Value of Equation (2) in Equation (1), we get,

→ (CD² + DH²) + FH² = CF²

→ a² + a² + a² = CF²

→ CF² = 3a²

→ CF = √3a .

Hence, we can say That Diagonal of a cube is √3 times of its sides.

__________________

Given:-

Side of cube = 5cm.

So,

→ Diagonal of cube = √3 * 5 = 5√3 cm. (Ans.)

The place value of 2 in 425.3 is tens of 20.

The value a digit in a number represents based on where it is in the number is known as place value. The place value of 7, for instance, is 700 or 7 hundred.

Given digit:

425.3

Write the number as shown below,

425.3 = 400 + 20 + 5 + 0.3

As you can see, the 2 is attached to the tens place,

Therefore, the place value of 2 in 425.3 is tens of 20.

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Hey there! :)

Answer:

a) 32 sticks.

b) 5n + 2 sticks.

Step-by-step explanation:

Solve this by finding the pattern.

Pattern # 1 = 7 sticks.

Pattern #2 = 12 sticks

Pattern #3 = 17 sticks.

We can see an increase of 5 sticks within each. We can use this to write an equation:

f(n) = 7 + 5(n-1)

***Where n is the term number

You can simplify the equation to become:

f(n) = 7 + 5n - 5

f(n) = 5n + 2.

Use this equation to solve for pattern # 6:

f(6) = 7 + 5(n-1)

f(6) = 7 + 5(5)

f(6) = 7 + 25

f(6) = 32.

Answer:

salt & vinegar : ready salted : cheese and onion

2                               3                      2

Step-by-step explanation:

salt & vinegar : ready salted : cheese and onion

6                               9                      6

Divide each by 3

salt & vinegar : ready salted : cheese and onion

6 /3                           9/3                      6/3

2                                    3                         2

Answer:

2:3:2

Step-by-step explanation:

Salt and Vinegar:  6

Ready Salted:  9

Cheese and Onion: 6

Put numbers in for the corresponding type:

Salt and Vinegar : Ready Salted : Cheese and Onion

6:9:6

All numbers share a common factor of 3.

Divide all the numbers by 3 to find simplest form.

2:3:2

Answer:

Hey there!

Total marbles= 5+2+3=10

Green marbles= 3

3/10=30%

Hope this helps :)

Answer:

-65536

Step-by-step explanation:

-1*4^8

Answer:

-65536

Step-by-step explanation:

Hey there! :)

Answer:

2nd choice.

Step-by-step explanation:

Given:

630 = 42f.

Divide both sides by 42 to solve for f:

630/42 = 42f/42

f = $15.

This equation is not an inequality, so a line would not be graphed on the number-line. The proper way to show a single solution would be with a point. Therefore:

The second choice is correct. The number line has a single point at f = 15.

Answer:

12 maybe the ANSWER.

hope it helps you

Answer:

Range = (-∞ , 6]

Step-by-step explanation:

Write down the inequality and then solve it to get the required solution.

Let's say "x" is the certain number.

4 + 3x <= 2x + 10

x <= 6

That's it, Best Regards!

Answer:

Only the y-coordinate changes by 4 so the true statements are that "The transformation rule is (x,y) →(x+0.y+4)" and that "The transformation is a vertical translation."

Answer:

A. A = (3w - 5) * w

B. 2 feet squared

Explanation:

A. The length is 5 less than 3 times the width. To write the rule for this, you’d subtract 5 from 3 times the width (3w - 5). The area is the length times the width so the rule would be:

A = (3w - 5) * w

——————————

B. Plug in 2 for w using the given rule.

A = (3[2] - 5) * (2)

Distribute

(6 - 5) * 2

Subtract 5 from 6

1 * 2 = 2

The answer is 2 feet squared since this is area.

Answer:

A

Step-by-step explanation:

A

Answer:

an altitude

Step-by-step explanation:

its is correct

Answer:

Step-by-step explanation:

The equation of a line is expressed as y = mx+c where m is the slope and c is the intercept.

m = Δy/Δx = y₂-y₁/x₂-x₁

Given two points (-1, -4) and (1, 6) with x₁= -1, x₂ = 1, y₁  = -4 and y₂ = 6

m = 6-(-1)/1-(-1)

m = 7/2

To get  c, we will substoute the slope and any of the point given into the equation of a line as shown;

Using tyhe point (1, 6) and m = 7/2

6 = 7/2(1)+c

6 = 7/2 + c

c = 6-7/2

c = 5/2

The equation of the line will be y = 7/2 x + 5/2