Can someone help me plz I will mark brainliest

Answer:

18 and 27

Step-by-step explanation:

x+(x+9)=45

2x+9=45

2=36

x=18

x+9=27

They are all true None are false

Answer:

2. yes, the person is walking faster between 40 and 100 seconds

Step-by-step explanation:

I'm very sorry I don't know about the first one that's a little above my knowledge level :(

Answer:

Midpoint (4|7)

Step-by-step explanation:

A(2,6) and B(6,8)

at first add the x values and divide it by two

(2+6)/2=4

second, add the y values and divide it by two

(6+8)/2=7

Midpoint (4|7)

-> and you can see it it is exactly in the middle of line segment

Answer:

Equation: (14.50-10)/0.15

Stanley has do 30 extra messages.

[tex] \frac{(14.5 - 10)}{0.15} [/tex]

Answer:

y=2x+5

Step-by-step explanation:

The y-intercept is when x is o so that will be 5.

To find the slope use the slope formula which is the change of y over the change of x. Choose 2 points.

[tex]\frac{y2-y1}{x2-x1}[/tex]

[tex]\frac{9-7}{2-1}[/tex]=[tex]\frac{2}{1}[/tex]=2

Answer:

b, a, c, b

Step-by-step explanation:

The pole measures 500 centimeters.

We are required to perform unit conversion to find the answer. Conversion of unit requires the relating link between two units. While relating the two units, usually greater unit holds singular or unit value, which is 1. The smaller unit holds value greater than 1, but at equivalent level with first unit. So, as per the known fact, 1 meter is equal to 100 centimeters. Using this formula to find measurement of 5 meters in centimeters.

1 meter = 100 centimeters

5 meters = 100 × 5

Performing multiplication to find the measurement of pole in centimeters

5 meters = 500 centimeters

Therefore, the measurement of pole is 500 centimeters.  

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Answer:

The slope between points T (9, -3) and U (-4, 1) is [tex]\mathbf{-\frac{4}{13}}[/tex]

Step-by-step explanation:

We need to find the slope between points T (9, -3) and U (-4, 1)

The formula used to find slope is: [tex]Slope=\frac{y_2-y_1}{x_2-x_1}\\[/tex]

We are given: [tex]x_1=9,y_1=-3, x_2=-4, y_2=1[/tex]

Putting values and finding slope:

[tex]Slope=\frac{y_2-y_1}{x_2-x_1}\\\\Slope=\frac{1-(-3)}{-4-9} \\Slope=\frac{1+3}{-4-9} \\Slope=\frac{4}{-13}\\Slope=-\frac{4}{13}[/tex]

So, slope between points T (9, -3) and U (-4, 1) is [tex]\mathbf{-\frac{4}{13}}[/tex]

Answer:

True

Step-by-step explanation:

Answer:

true

Step-by-step explanation:

The mean repair cost for the stereos is (63.04, 102.86) with an 80% confidence interval.

The critical factor for a 90% confidence interval for the true mean repair cost for stereos is given by;

Critical factor = (x-μ)/(s/√n)

where, x = sample mean repair cost

s =  standard deviation of a sample

n = sample of stereos

μ  = critical value

We have been given that a student records the repair cost for 17 randomly selected washers. a sample mean of $⁢82.95 and a standard deviation of $14.89 are subsequently computed.

Since we don't know the population standard deviation, we used t statistics to create the 80% confidence interval in this case.

So, the 80% confidence interval for the true mean repair cost, μ is ;

⇒ P(-1.337< t₅ < 1.337) = 0.80  

{As the critical value of t at 5 degrees of  freedom are -1.337& 1.337 with P = 5%}

⇒ P(-1.337< (x-μ)/(s/√n) < 1.337) = 0.80

⇒ P(-1.337×(s/√n) < (x-μ) < 1.337×(s/√n)) = 0.80

⇒ P(x - 1.337×(s/√n) < μ < x + 1.337×(s/√n)) = 0.80

80% confidence interval for

⇒ μ = (x - 1.337×(s/√n) , x + 1.337×(s/√n))

Here, x = $82.95 , s  = $14.89 , and n = 17

⇒ μ = (82.95 - 1.337×(14.89 /√17) , 82.95 + 1.337×(14.89 /√17))

⇒ μ = (63.04, 102.86)

Hence, the mean repair cost for the stereos is (63.04, 102.86) with a 80% confidence interval.

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Answer:

Step-by-step explanation:

63

1/7x-5=4

1/7x=9

X=63

Answer:

I think it's x=9 y=1

Step-by-step explanation:

3y+5=2y 20x-70=12x+2

+3y +3y -12x -12x

5=5y 8x-70=2

/5 /5 +70 +70

1=y 8x=72

/8 /8

x=9

Answer:

yh thats the answer hopee this work

Answer:

we conclude that:

If 4x - 6≠4, then 2x–5≠5 is the contrapositive of a conditional statement if 2x -5=5, then 4x-6=14.

Step-by-step explanation:

We know that the contrapositive of a conditional statement of the form "If p then q" is termed as "If ~q then ~p".

In other words, it is symbolically represented as:

' ~q ~p is the contrapositive of p q '

For example, the contrapositive of "If it is a rainy day, then they suspend the match" is "If they do not suspend the match, then it won't be a rainy day."

Given

p: 2x -5=5

q: 4x-6=14

As the contrapositive of a conditional statement of the form "If p then q" is termed as "If ~q then ~p

Thus, we conclude that:

If 4x - 6≠4, then 2x–5≠5 is the contrapositive of a conditional statement if 2x -5=5, then 4x-6=14.

Answer:

No, -1 has two outputs

Step-by-step explanation:

Hope this helps!      :3

plz mark as brainliest!

Answer:

2.8

Step-by-step explanation:

I took the test.

Answer:

5+√3(Decimal: 6.732051)

Step-by-step explanation:

√3+5

=5+√3(Decimal: 6.732051)

Answer:

The sum of -3/7 and its opposite is 0

Step-by-step explanation:

The problem says to find the sum of -3/7 and its opposite.

The opposite of -3/7 is +3/7

Sum means we need to add -3/7 and +3/7.

[tex]\dfrac{-3}{7}+\dfrac{3}{7}=0[/tex]

As the two fractions have opposite signs, it means when we add them we get the answer as 0.

Answer:

5

Step-by-step explanation:

plug this ecuation into desmos graphing calculator(it's a website). Then see how many times the graph crosses the x-axis.

To find the zeroes:

0 of a function means for what value(s) of x will the f(x) or y equal zero(0). To find the zeroes of this function, just see what numbers will make f(x) = 0. Since this equation is already factored, our job is much easier. Focus on small parts of the equation and don't get ovewhelmed by how long it its. For you problem, start by -5(x^2-7). what x will make -5(x^2-7) = 0? As long as (x^2-7) = 0, the whole equation will equal zero since any number times 0 is 0. (x^2-7)=0, move -7 to the right, x^2=7, get squre root of both sides, you will have x=plus or minus[tex]\sqrt{7}[/tex]. This is one of the zeroes. There are many more in this equation since we have more than one x-intercepts. Now using thsi tactic, you can solve for the rest of the zeroes.

there is a calculator called symbolab, It's also a website and it can calculate whatever you need.

The number of x-intercepts is five would be the given function.

The x-intercept is defined as an intercept that is located at the x-axis of the plane, is the location or coordinate from where the line crosses,

The function is given in the question

F(x) = -5(x²-7)(x+6)²(x+1)(4x+1)

We have to determine the number of x-intercepts that would the function.

F(x) = -5(x²-7)(x+6)²(x+1)(4x+1)

The x-intercept occurs at a point where F(x) = 0

0 = -5(x²-7)(x+6)²(x+1)(4x+1)

-5(x²-7)(x+6)²(x+1)(4x+1) = 0

Here (x²-7) = 0, and (x+6)² = 0, (x+1) = 0, and (4x+1) = 0

x² = 7 , and (x+6) = 0, x = -1 , and 4x = -1

x = ±7 and x = -6 , x = -1 , and x = -1/4

x = 7, -7  and x = -6 ,  x = -1 , and x = -1/4

Therefore, the number of x-intercepts is five would be the given function.

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Answer:

excuse me these words are some other language

Answer:

It's y= x-5

Step-by-step explanation:

Answer:400,000

Step-by-step explanation:If it doubles every 12 hours then the first 13 gone be 200,000 then 12 hours later it gone 400,000

Answer:

area is 20

Step-by-step explanation:

Answer:

20 units squared

Step-by-step explanation:

4(base) x 10(height) = 40

40 / 2 = 20

Answer:

2 to the 3 power

The factors of the model x^2-9x+14 is (x-2) and (x-7)

The model is x^2-9x+14

Factoring the expression, we get

x^2-7x-2x+14=0

x(x-7)-2(x-7)=0

(x-2)(x-7)=0

The factors of the given model is (x-2)(x-7)

To check if it is a factor or not substitute x=2

2^2-9(2)+14=4-18+14=4-4=0

So x-2 is a factor of the model

7^2-9(7)+14=49-63+14=49-49=0

So x-7 is also a factor of the given model

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Property which represents the given method (8x9)x3= (3x9) x8 is associative property over multiplication.

As given in the question :

Given method :

(8x9)x3= (3x9) x8

On left hand side (8x9)x3

First we multiply 8×9 =72 and then multiply it to 3

72 ×3=216

On right hand side (3× 9)×8

First we multiply (3×9) =27 then multiply it to 8

27×8=216

Left hand side = right hand side

It represents associative property over multiplication.

Therefore, property which represents the given method (8x9)x3= (3x9) x8 is associative property over multiplication.

The complete question is :

Which property is (8x9)x3= (3x9) x8

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Answer:

A (4,6)

ok im going to go through this step by step

4(4)=3(6)-2

16=18-2

16=16 (true solution)

18=3(4)+(6)

18=12+6

18=18 (true solution)

Answer:

y=mx+b

Step-by-step explanation:

the formula for finding the y value