Please help me i dont understand this. I dont get it or at least explain to me. please ​

Answer:

x=3

Step-by-step explanation:

Answer:

Step-by-step explanation:

Given :

l + m + n = 9

l²+ m² + n²= 31

l + m + n = 9

On squaring both sides

(l + m + n)²= 9²

(l²+m²+n²+2(lm+mn+nl) = 81

31 +2(lm+mn+nl) = 81

2(lm+mn+nl) = 81 - 31

2(lm+mn+nl) = 50

(lm+mn+nl) = 50/2

(lm+mn+nl) = 25

Hence, the value of (lm+mn+nl) = 25

Answer:

YOU GOT GOOGLE

Step-by-step explanation:

GOOGLE!!

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Work Shown:

0.001 = 1/1000

Apply the cube root to both parts of 1/1000 to get

[tex]\sqrt[3]{1} = 1\\\\\sqrt[3]{1000} = 10[/tex]

So this means that, [tex]\left(\frac{1}{10}\right)^3 = \frac{1}{10}*\frac{1}{10}*\frac{1}{10} = \frac{1}{1000} = 0.001[/tex]

Having a side length of 1/10 = 0.1 unit leads to a volume of 0.001 cubic units.

-------------

A shortcut alternative is to use your calculator to get

[tex](0.001)^{1/3} = 0.1[/tex]

The exponent of 1/3 is the same as a cube root.

Answer:

- 20

Step-by-step explanation:

Step 1:

10 - 2v = - 5v - 50      Equation

Step 2:

10 + 3v = - 50    Add 5v on boh sides

Step 3:

3v = - 60      Subtract 10 on both sides

Step 4:

- 60 ÷ 3      Divide

Answer:

v = - 20

Hope This Helps :)

TREE:

white--ham---american

---swiss

---cheddar

white--turkey---american

---swiss

---cheddar

white--beef---american

---swiss

---cheddar

wheat--ham---american

---swiss

---cheddar

wheat--turkey---american

---swiss

---cheddar

wheat--beef---american

---swiss

---cheddar

PROBABILITY OF RANDOM SELECTION OF WHITE BREAD, BEEF/TURKEY, & CHEDDAR:

6/26, reduced to 3/13

Answer:

fourth option

Step-by-step explanation:

Using the trigonometric identity

cos²x + sin²x = 1

Divide all terms by cos²x

[tex]\frac{cos^2x}{cos^2x}[/tex] + [tex]\frac{sin^2x}{cos^2x}[/tex] = [tex]\frac{1}{cos^2x}[/tex] which gives

1 + tan²x = sec²x

Answer:

DD

Step-by-step explanation:

Answer:

barium, strontium, beryllium

Answer:

1, 4, and 6 are correct

Step-by-step explanation:

Answer:

true

Step-by-step explanation:

100-6

Answer: True

Step-by-step explanation: 100-61=39

Answer:

irrational

Step-by-step explanation:

[tex]\sqrt{50}\\\\=\sqrt{25*2}\\\\=\sqrt{5^{2}*2 } \\\\=5\sqrt{2}[/tex]

so it's irrational

Irrational because its not an even number. If you try to do it you should get around 7.05

Answer:

2222

Step-by-step explanation:

Answer:

$113.07

Step-by-step explanation:

0.12*876=105.12

105.12+7.95=113.07

Answer:

22 and 46

Step-by-step explanation:

let

one number is x

another is 2x+2

now 2x+2+x=68

or, 3x+2=68

3x=66

or x=66/3=22

so one number is 22 and another is (22X2+2)=46

Answer:  142 and 286

==========================================

Explanation:

If we multiply a given term by 2, then add 2, we get

7*2+2 = 14+2 = 16

16*2+2 = 32+2 = 34

34*2+2 = 68+2 = 70

So the rule seems to be "multiply by 2, then add 2"

If that rule holds up, then the next two terms are

70*2+2 = 140+2 = 142

142*2+2 = 284+2 = 286

Answer:

x = -6

Step-by-step explanation:

Answer: x=-6

Step-by-step explanation:

Given

2x+5=x-1

Subtract 5 on both sides

2x+5-5=x-1-5

2x=x-6

Subtract x on both sides

2x-x=x-6-x

x=-6

Answer:

24°

Step-by-step explanation:

Measure of other acute angle = 90° - 66° = 24°

Answer:

Step-by-step explanation:

Given the height of a golf ball in feet modelled by the formula h(t) = -16t² + 100x where t is in seconds, we are to find the height of the golf after 2.5 seconds. To do that we will simply substitute t = 2.5secs into the formula given;

[tex]h(t) = -16t^2 + 100x\\\\h(2.5) = -16(2.5)^2 + 100(2.5)\\\\h(2.5) = -16(6.25) + 250\\\\h(2.5) = -100+250\\\\h(2.5) = 150\\\\[/tex]

Hence the height of the golf after 2.5 seconds is 150ft.

Answer:

Lixin is the fastest typist

Step-by-step explanation:

Amirah = 45

Lixin = 46

Shirley = 42

We divide the words by minutes which is basically Unit rate

So we take each person and divide by their words and minutes

[tex]\frac{words}{minutes}[/tex]

ALWAYS when ur finding unit rate divide the buggest number by the smallest!

Answer:

1

Step-by-step explanation:

2/3 times the power of 0 is 1. Anything to the power of zero equals 1. then you do 1 to the power of -3. which is one .

Answer:

FABCDE

Step-by-step explanation:

divide 240 by 60 and  you get 4 turns

Answer:

what do you need help for?

Step-by-step explanation:

Answer:

7.9%

Step-by-step explanation:

The formula is P=x time 100, divided by y

the x is $0.25

the y is $3.15

0.25x100=25

25/3.15=7.936

rounded to the tenths place it's 7.9

Answer:

hope this will help you

Answer:

This means we need 3 chocolate chips and 4 peanut butter in each bag for a total of 7 cookies in each bag

Step-by-step explanation:

Find the prime factors of each number

Chocolate chips 18 = 3*6 = 3 * 2*3

Peanut butter  24 = 4*6 = 2*2*2*3

We want to fill the greatest number of bags so cancel the like factors

Chocolate chips 18 = 3*6 = 3

Peanut butter  24 = 4*6 = 2*2 =4

This means we need 3 chocolate chips and 4 peanut butter in each bag for a total of 7 cookies in each bag

Answer:

"If the shape is not a rectangle, then the shape doesn't has four sides."

Step-by-step explanation:

Given conditional statement is,

" Is a shape has four sides, then the shape is a rectangle."

Here we have two statements:

Statement p → A shape has four sides

Statement q → The shape is a rectangle.

Contrapositive of the statement will be:

If [tex]\sim q[/tex] then [tex]\sim p[/tex].

Therefore, contrapositive will be,

"If the shape is not a rectangle, then the shape doesn't has four sides."