i need help 100 points for a question

Step-by-step explanation:

When x = 8 and y = 6

= 2x - ( 4 + y )

Put the value of x and y ...

= 2 × 8 - 4 × 6

Multiply 2 and 8 and 4 and 6 ...

= 16 - 24

Subtract it

= - 8

Hence...the answer is -8 ....

The solution to the simultaneous equations, 5x + y = -5 and 5x – 3y = 11, is: (-1/5, -4)

The solution is the pair of values of x and y that is true for both equations.

Given the simultaneous equations,

5x + y = -5

5x – 3y = 11

Subtract

4y = -16

y = -4

Substitute y = -4 into equation 1.

5x + (-4) = -5

5x - 4 = -5

5x = -5 + 4

5x = -1

x = -1/5

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Answer:

The missing value is 6a

Step-by-step explanation:

Given:

[tex]\displaystyle \large{A(-3a,b)}\\\displaystyle \large{B(3a,b)}[/tex]

Find:

Missing Value

Distance Formula:

[tex]\displaystyle \large{\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}}[/tex]

Determine:

[tex]\displaystyle \large{(x_2,y_2)=(3a,b)}\\\displaystyle \large{(x_1,y_1)=(-3a,b)}[/tex]

Input given information above in the formula:

[tex]\displaystyle \large{AB=\sqrt{(3a-(-3a))^2+(b-b)^2}}\\\displaystyle \large{AB=\sqrt{(3a+3a)^2+(0)^2}}\\\displaystyle \large{AB=\sqrt{(6a)^2}}\\\displaystyle \large{AB=6a}[/tex]

The length is 6a but since we want to find the value in the square root then the answer is still 6a

Answer:

8 out of 52

or

4 out of 26

Step-by-step explanation:

So you have a 52 deck of cards there are:

Number 6 cards = 4

Number 10 cards = 4

there is a 8 out of 52 chance of you pulling a 6 or 10 card

or (simplify)

4 out of 26 chance

~Denki Kaminari here~

here, this may help you on how to solve probability:

A probability is a number that reflects the chance or likelihood that a particular event will occur. Probabilities can be expressed as proportions that range from 0 to 1, and they can also be expressed as percentages ranging from 0% to 100%

The best example for understanding probability is flipping a coin: There are two possible outcomes—heads or tails.

What’s the probability of the coin landing on Heads? We can find out using the equation P(H) = ?P(H)=?P, left parenthesis, H, right parenthesis, equals, question mark.You might intuitively know that the likelihood is half/half, or 50%.  But how do we work that out?  Probability = one chance that it we can calculate/ one chance on pure probability

Formula for calculating the probability of certain outcomes for an event

Formula for calculating the probability of certain outcomes for an event

In this case:

Probability of a coin landing on heads

Probability of a coin landing on tails

Probability of an event = (# of ways it can happen) / (total number of outcomes)

hope this helps :D

In total there are 125 refrigerators at the store.

Percentage is defined as a given part or amount in every hundred. It is a fraction with 100 as the denominator and is represented by the symbol "%".

Given that, at a store, 40% of all the refrigerators are silver.

There are 50 silver refrigerators at the store.

Let the total number of refrigerators at the store be x.

Here, 40% of x=50

40/100 ×x=50

0.4x=50

x=50/0.4

x=125

Therefore, in total there are 125 refrigerators at the store.

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Answer:

a) [tex]y = 0.118x^{2} +2.112x+4.215\\[/tex]

b)height = 896.2 feet

Step-by-step explanation:

for b, substitute 20 in place of x in the first equation.

Answer:

27½

Step-by-step explanation:

7½×3⅔=((7×2+1)/2) × ((3×3+2)÷3)

= (15×11)÷6=165/6

165/6= 27½

The expression [tex]7\frac{1}{2} - 3\frac{2}{3}[/tex] simplifies to [tex]3\frac{5}{6}[/tex].

A fraction is written in the form of p/q, where q ≠ 0.

Fractions are of two types they are proper fractions in which the numerator is smaller than the denominator and improper fractions where the numerator is greater than the denominator.

The expression [tex]7\frac{1}{2} - 3\frac{2}{3}[/tex] is 15/2 - 11/3.

Now, LCM of 2 and 3 is 6.

∴ (45 - 22)/6.

= 23/6.

= [tex]3\frac{5}{6}[/tex]

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Answer:

The answer would be 64 cm.

Step-by-step explanation:

Step 1: Identify which shapes you will do to find the area
(I did 2 and 12 and 8 and 5)
Step 2: Do 12x2 (24)
Step 3: Do 8x5 (40)
Step 4: Add 40+24 (64)
Step 5: Label
I hope this helps!

Answer:

314.00+200.96+113.04+78.50+63.59+38.47+28.26+3.14+.79

=840.75

Answer:

A and B.

Step-by-step explanation:

4x^2 - 4x - 3 = 0    

4x^2 + 2x - 6x - 3 = 0

2x(2x + 1) - 3(2x + 1) = 0

(2x - 3)(2x + 1) = 0

x = 3/2, -1/2.

Answer:

Step-by-step explanation:

A)[tex](tanx-4)(9sin^2x-1)=0\\\\\\[/tex]

[tex]9sin^2x-1=0\\\\sin^2x=\frac{1}{9} sinx=\frac{1}{3}[/tex] or [tex]sinx=\frac{-1}{3}[/tex]

OR    [tex]tanx=4\\[/tex]

B)

[tex]3sin2x=3.2.sinx.cosx\\\\6.sinx.cosx-4.sinx= 2sinx.(3cosx-2)=0\\\\3.cosx=2 cosx=\frac{2}{3}[/tex]

Answer:

They(play) football for two hours (present perfect continuous

Answer:

a(-2.6) b(5, 0) c(9,5)

Step-by-step explanation:

the rule is x+1 y+2 for each of the vertices

Answer; hi sisters daddy chill

Step-by-step explanation:

Answer:

Step-by-step explanation:

To get the equation, you must create the factors containing the roots.

So for example the first set of roots can be produced from

(x -2)(x^2 + 9)

which equals (when expanded) x^3 + 9x - 2x^2 - 18 which when put in the correct order gives

x^3 -2x^2 + 9x - 18

The second one is a bit more difficult to judge.

-5  and -3+  square root(2)

I don't think this is a polynomial. The coefficent is not integral. (-3 +√2)

Answer:

21.43

Step-by-step explanation:

Turn 7 percent to a decimal: 0.07

8800 × 0.07 = 616

13,200÷616=21.4285 etc

Round two decimal places

21.43

Answer:

your answer is B. 8

Step-by-step explanation:

Substitute x for 8.

2(8)+10

16+10=26

Step-by-step explanation:

the scaling ratio is 12/20 = 3/5.

this always applies only to one-dimensional distances, lengths.

the perimeter is calculated as the sum of individual lengths. so while each length is scaled by the same ratio, also the sum is then scaled by that ratio.

p_old = a + b + c

p_new = ra + rb + rc = r(a + b + c) = r×p_old

so, the ratio for the perimeter is also 3/5.

for the area this is a bit different, as an area is always calculated by multiplying 2 lengths (other unscaled factors can be ignored for that consideration of relative change), and that means the scaling ratio has to be multiplied in twice.

a_old = a × b

a_new = ra × rb = r² × a×b = r² × a_old

so, the ratio for the area is

(3/5)² = 9/25

Answer:

i dont know

Step-by-step explanation:

i do middle school not

highschool or college

Answer:

90m^2

Step-by-step explanation:

1/2 d1*d2

1/2 12*15

1/2*180

90 Square meter

Answer:

Well, there is no picture so theres no way to know what it could be. All I can do is guess.

B

Answer:

=2ax -6by +4cz + 4by -14ax +9cz -4ax -6by

=2ax -14ax -4ax -6by +4by -6by +4cz +9cz

= -16ax -8by +13cz

The distance from the tree house that the ball strike the ground is 10feet

Given the path of the ball expressed by the parabola equation:

y = -2x^2+14x +60

The point where the ball strikes the ground is the point where y = 0. Substitute into the equation to have:
-2x^2+14x +60 = 0

x^2 - 7x - 30 = 0

Factorize the result

x^2 - 10x + 3x - 30 = 0
x(x-10)+3(x-10) = 0
x - 10 =0

x = 10

Hence the distance from the tree house that the ball strike the ground is 10feet

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Answer: 13,600.

Step-by-step explanation: every hour is 400 bacteria produced. 400x19= 7600. 7600+6000=13600

Answer:

The sun, eight plants and some other celestial

Answer:1

Step-by-step explanation:

The sun, eight plants and some other celestial

Step-by-step explanation:

the angle of elevation of the sun is θ is related to the given sides of the right triangle (assuming the ground is horizontal and the flag pole is vertical) by tangent.

the shadow is adjacent to the angle while the flagpole is opposite to it.

so to find the angle of elevation:

arctan(20/8.9)

= 66.01 degrees

comment if you have any doubt or need further help.

Angle be alpha

[tex]\\ \rm\Rrightarrow tan\alpha=\dfrac{P}{B}[/tex]

[tex]\\ \rm\Rrightarrow tan\alpha=\dfrac{20}{8.9}[/tex]

[tex]\\ \rm\Rrightarrow tan\alpha=2.25[/tex]

[tex]\\ \rm\Rrightarrow \alpha=tan^{-1}(2.25}[/tex]

[tex]\\ \rm\Rrightarrow \alpha=66.04°[/tex]

Answer:

156

Step-by-step explanation:

39x4 = 156

Simple multiplication :)

Hope this helps, and please mark me brainliest!

Answer:

156

Step-by-step explanation:

p=4 a

Answer:

you cant do these they are 3rd and 4th questions

Step-by-step explanation:

Answer:

You can find the answers by dividing the numbers

Step-by-step explanation:

Hmu if u still need help :)