Bài 1 Tìm x biết
X^2=16

Answer:

-3

Step-by-step explanation:

We know that parallel lines have the same slope so if AB has a slope of -3 then all lines that are parallel have a slope of -3

Answer:

Maybe it is 146 or some other number

Answer:

Amount of his salary spent on food = Php 7400

Step-by-step explanation:

Mr. Bartolome's salary = Php 18500

Percentage of salary spent on food = 40%

Amount of his salary spent on food = 40% of Php 18,500

= 40/100 × Php 18,500

= 0.4 × Php 18,500

= Php 7400

Amount of his salary spent on food = Php 7400

Step-by-step explanation:

let the number be x

1/2(x) - 1/6(x) =10 -1/8(x)................this is the equation

1/12(x) + 1/8(x)=10

5/24(x)=10

cross multiply

5x= 240

x=240/5

x=48

Answer:

20

Step-by-step explanation:

Multiply 4/7 with 35, this will get you 140/7, which simplifies to 20 employees

Answer:

j=|x|

Step-by-step explanation:

Answer:

70. 8x⁴

71. 3n - 10

72. a/5 + 12

Step-by-step explanation:

70. a number "x" raised to the fourth = x⁴

Product of 8 and x⁴ = 8 × x⁴

= 8x⁴

71. 3 times a number "n" = 3 × n = 3n

3n decreased by 10 = 3n - 10

72. Quotient of a number "a" and 5 = a/5

12 more than a/5 = a/5 + 12

Answer:

Answer is derived according to the procedure of calculating LCM of any two numbers

Step-by-step explanation:

If you have any other questions

ask in comments

[tex]\boxed{\large{\bold{\textbf{\textsf{{\color{blue}{Answer}}}}}}:)}[/tex]

[tex]x^2-y^2-1-2y \\\\x^2-(y^2+2y+1)\\\\x^2-(y+1)^2\\\\(x)^2-(y+1)^2\\\\(x+y+1)(x-y-1)[/tex]

[tex]\\\\[/tex]

[tex] y^2-1-x^2-2x\\\\y^2-(x^2+2x+1)\\\\y^2-(x+1)^2\\\\(y)^2-(x+1)^2\\\\(y+x+1)(y-x-1) [/tex]

According to the question,

we have to find the LCM

Answer:

Option B

<F = 26°

<D = 64.01°

FD = 89

Answered by GAUTHMATH

For right triangle EFD,  m ∠F ≈ 26°, m ∠D ≈ 64.01° and FD = 89

The correct answer is an option (B)

It is the longest side of the right triangle.

For a right triangle,

[tex]a^{2}+ b^{2} = c^{2}[/tex], where c is hypotenuse and a, b area other two sides of the right triangle

For given example,

We have been given a right triangle EFD with hypotenuse FD.

Also, EF = 80, ED = 39

Using the Pythagoras theorem,

[tex]\Rightarrow FD^{2}= EF^{2} + ED^{2}\\\\ \Rightarrow FD^{2}= 80^{2} + 39^{2}\\\\ \Rightarrow FD^2 = 6400 + 1521\\\\ \Rightarrow FD^2 = 7921\\\\\Rightarrow FD = 89[/tex]

Consider, sin(F)

[tex]\Rightarrow sin(F)=\frac{ED}{FD} \\\\\Rightarrow sin(F)=\frac{39}{89}\\\\ \Rightarrow sin(F)=0.4382\\\\\Rightarrow \angle F=sin^{-1}(0.4382)\\\\\Rightarrow \angle F=25.98^{\circ}\\\\\Rightarrow \angle F\approx 26^{\circ}[/tex]

Now, consider sin(D)

[tex]\Rightarrow sin(D)=\frac{FE}{FD}\\\\ \Rightarrow sin(D)=\frac{80}{89}\\\\ \Rightarrow \angle D = sin^{-1}(0.8988)\\\\\Rightarrow \angle D = 64.009^{\circ}\\\\\Rightarrow \angle D \approx 64.01^{\circ}[/tex]

Therefore, for right triangle EFD,  m ∠F ≈ 26°, m ∠D ≈ 64.01° and FD = 89

The correct answer is an option (B)

Learn more about Pythagoras theorem here:

https://brainly.com/question/343682

#SPJ2

Answer:

The speed is 20.8  m/s

Step-by-step explanation:

If a projectile ascends vertically, and after 3 seconds it reaches its maximum height, calculate the velocity that it carries to the middle of its downward trajectory

Let the maximum height is h and initial velocity is u.

From first equation of motion

v = u + at

0 = u - g x 3

u = 3 g.....(1)

Use third equation of motion

[tex]v^2 = u^2 - 2 gh \\\\0 = 9 g^2 - 2 gh \\\\h = 4.5 g[/tex]

Let the speed at half the height is v'.

[tex]v^2 = u^2 + 2 gh \\\\v'^2 = 0 + 2 g\times 2.25 g\\\\v'^2 = 4.5\times 9.8\times9.8\\\\v' = 20.8 m/s[/tex]

Answer:

D. Closed circle on 8, shading to the right.

Answer:

Step-by-step explanation:

Answer:

write your question properly

Step-by-step explanation:

Answer:

180m cubed

Step-by-step explanation:

Multiply the length, width, and height together: 6×6×5=180

Answer:

Formula of a rectangular prism:

L x W x H

Now we place in the numbers and solve:

5 x 6 x 6 = 180 m3

Step-by-step explanation:

This can be split into 3 separate rectangles in two ways:

Way 1:

(9 * 8) + (6 * 5) + (3 * 3)

Step 1: The 18yd side is split into 9 (first rectangle), 6 (second rectangle), and 3 (third rectangle).

72 + 30 + 9

Step 2: Multiply each of the three products.

102 + 9

Step 3: Add from left to right

111 square yards

Way 2:

(9 * 3) + (15 * 2) + (18 * 3)

Step 1: This time, the 8yd side is split. 3 is used for rectangles 1 & 3, and 2 is used for rectangle 2.

27 + 30 + 54

Step 2: Multiply each of the three products.

57 + 54

Step 3: Add from left to right.

111 square yards.

Either way, you will still get 111 square yards as the answer.

Answer:

111

Step-by-step explanation:

Explanation is in the pic. Hope this helps!

Answer:

5/40

Step-by-step explanation:

Dividing fractions is the same as multiplying by the reciprocal:

5/4 ÷ 10

5/4 x 1/10

Multiply the numerators together and the denominators together:

= 5/40

So, the answer is 5/40

Answer:

5/40

Step-by-step explanation:

Skip, flip, multiply.

(5/4) / (10/1)

(5/4) * (1/10)

5/40

Instead of dividing by ten, think of you're multiplying by 1/10th. It's a lot easier on the brain.

Answer:

speed is 2t - 5

velocity is 2t - 5

a = 2 m/s²

Step-by-step explanation:

Given the position of a particle expressed as:

s(t) = t^2 - 5t + 1

speed v = ds/dt

ds/dt = 2t - 5

Hence the speed is 2t - 5

velocity can also  be expressed as the speed, hence, velocity is 2t - 5

Acceleration is the change in velocity with respect to time. Hence;

a = dv/dt

a = 2 m/s²

Answer:

X=20

a< = 125

Step-by-step explanation:

For g(x) to be the inverse of f(x) then f times g needs to equal g x f

F(g(x)) = 3 times (1/3x) = x

G(f(x)) = 1/3 times (3x) = x

The answer is c. 1/3(3x)

Answer: -3x+y=-4

Step-by-step explanation:

Standard form is Ax+By=C. In y=Mx+b form, it would be y=3x-4. To put it into standard form you subtract 3x from both sides. So then you have -3x+y=-4.

Answer:

64π

General Formulas and Concepts:

Geometry

Area of a Circle Formula: A = πr²

Pre-Calculus

Center-Radius Form: (x - h)² + (y - k)² = r²

Step-by-step explanation:

Step 1: Define

Identify

(x - 9)² + (y - 3)² = 64

↓ Compare to Center-Radius Form

Center (9, 3)

Radius² = 64

Step 2: Find Area

Answer:

common difference = 4

Step-by-step explanation:

common difference is the difference between the successive term and its preceding term.

let's take the successive term of -20 that is - 16

common difference (d) = successive term - preceeding term

= -16 -(-20)

= -16 + 20

= 4

if we take the successive term of -16 that is -12

we'll get the same common difference.

d = -12 -(-16)

d = -12 + 16

d = 4

this means that the common difference for an AP remains constant.

Answer:

⊥

Step-by-step explanation:

d and b meet at a 90 degree angle ( as shown by the box)

The lines are perpendicular (⊥)

Answer:

hope this helps you

have a great day

Answer:

6 + 12/13, or 90/13 people will be served

Step-by-step explanation:

Ratios stay the same, no matter the quantity.

Given this, we can say that (13 grapes / 3 people) = (30 grapes / x amount of people)

13/3 = 30 / x

multiply both sides by 3 to remove a denominator

13 = 30 * 3 /x

multiply both sides by x to remove the other denonimator

13 * x = 30 * 3

13 * x = 90

divide both sides by 13 to isolate the x

x = 90/13 = 6 + 12/13 ≈6.92 people