can you help me with this

Answer:(b) step 1

Step-by-step explanation:

The wrong step in the student's workings is step 1

The equation is given as:

x^2 - 2x - 8 = 0

Expand the equation

x^2 + 2x - 4x - 8 = 0

Factorize the equation

x(x + 2)- 4(x + 2)

Factor out x + 2

(x - 4)(x + 2) = 0

The above means that the factored equation of x^2 - 2x - 8 = 0 is (x - 4)(x + 2) = 0

This means that the step 1 of the student's step is wrong and incorrect

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twice m is 2m, increased by 2 is + 2, equals 7 more than m is m + 7. So C is your correct answer.

Answer:

C

Step-by-step explanation:

twice m increased by 2, is basically 2m + 2.  Seven more than m translate to m+7. Hope that helps.

Answer:

c) 533

Step-by-step explanation:

Use the trigonometry theorem

tan10°= 94/x

x=533

No these triangles are not similar.

Step-by-step explanation:

Given Information on First triangle :

Base = 3

Height = 8

Given information on Second triangle :

Base = 4

Height = 10

Area of a Right Angle triangle :

[tex] \frac{base \times height}{2} [/tex]

Area of First triangle :

[tex] \frac{3 \times 8}{2} = \frac{24}{2} \\ \\ = 12[/tex]

Area of Second triangle :

[tex] \frac{4 \times 10}{2} = \frac{40}{2} = 20[/tex]

Their Ratio :

[tex]12:20 = \frac{12}{20} \\ = \frac{3}{5} [/tex]

So I guess no, the triangles are not similar.

Answer:

6678

Step-by-step explanation:

742 = 700+40+2

(700+40+2)*9 = 700*9+40*9+2*9 = 6300+360+18 = 6678

Answer:

D Write 742 as 700 + 40 + 2. Multiply each addend by 9. Then add the three products to get 6,678.

Step-by-step explanation:

I did the math >:3

sorry if it's wrong

Answer:

i think its the last one

Step-by-step explanation:

i think its the last on ig

The true statements from the given statements are -

Two triangles are congruent when they have exactly the same three sides and exactly the same three angles.

Given is a triangle as shown in the image.

It is clear that the measure of ∠MNP is less than ∠ONP as

∠MNP = 38°  <   ∠ONP = 39°

The line NP ≅ NP as it is common to both sub - triangles and has same length.

OP > PM since ∠ONP = 39° > ∠MNP = 38°

Therefore, the true statements from the given statements are -

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Answer:

88*0.9= 79.2 (since it's 10% higher, multiply by .9 to find out what 90% of 88 is

you also could've done 88*0.1=8.8 and then subtract 8.8 from 88 and get 79.2

either way his normal weight is 79.2kg

Answer: 280.1

Step-by-step explanation: so the reason this is right is because any number under 5 would round it down but 5 and up and it would round up.

Answer: 65%

Step-by-step explanation:

The organization sent out 640 invitations.

416 out of this 640 attended the fundraiser.

The percentage who attended is:

= 416/ 640

= 0.65

= 65%

There's no picture to it.

Answer:

27/40

Step-by-step explanation:

Answer:

3/8 divided by 5/9 = 0.675

Step-by-step explanation:

in fraction form = i dont know srry =/

Answer:

answer 2

Step-by-step explanation:

Answer:

7.429 cents

Step-by-step explanation:

Given that:

Price change = $1.51 to $2.03

Period of time = 7 years

Therefore, the annual inflation rate :

Difference in price / number of years

($2.03 - $1.51) / 7

$0.52 / 7

= 0.0742857 per year

= 0.0742857 * 100 (about 7.429 cents per year)

Answer:

60xcm^3

Step-by-step explanation:

6 times 10 times x

60x

Answer:

The answer would be 11 7/8 pounds

Step-by-step explanation:

2 3/8 times 5 equals 11 7/8.

Hope I helped!! :)

Sorry if it's wrong! :(

Pls mark brainlist.

Answer:

the missing blank for forks is 0 and the missing blank for spoons is 20

Step-by-step explanation:

Answer:

3?

Step-by-step explanation:

Answer:

20

Step-by-step explanation:Please give me a brainly

Answer:  y=1/2x+-4

(You cant give a certain number of points btw)

Answer: X= 2

Step-by-step explanation:

if you substitute the options witht the x in the equation. 2 is the only one that has 18 as the result.

Answer:

The price to make maximum revenue is 1 and the maximum revenue is 2000.

Step-by-step explanation:

Consider the provided information.

Revenue is the product of the number of sales and the sales price.

Here, [tex]p[/tex] is the price of a cookie and the number of cookies sold is [tex]x =- 2000 p + 4000[/tex].

[tex]\text{Revenue}=p(-2000 p + 4000)[/tex]

[tex]\text{Revenue}=-2000 p^2 + 4000p[/tex]

The above equation is a quadratic equation and the graph of the above equation will be a downward parabola because the coefficient of [tex]p[/tex] is negative.

The vertex(axis of symmetry) of a downward parabola has the maximum point.

The axis of symmetry is  [tex]x=\frac{-b}{2a}[/tex]  for the quadratic equation [tex]ax^2+bx+c=0[/tex].

By compare Revenue equation with [tex]ax^2+bx+c=0[/tex], we get:

[tex]x=p, a=-2000, b=4000 \text{ and } c=0[/tex]

Now put the respective values in the formula [tex]x=\frac{-b}{2a}[/tex] .

[tex]p=\frac{-4000}{2(-2000)}[/tex]

[tex]p=1[/tex]

So revenue will be maximum for [tex]p=1[/tex].

Now put [tex]p=1[/tex] in [tex]\text{Revenue}=-2000 p^2 + 4000p[/tex]

[tex]\text{Revenue}=-2000 (1)^2 + 4000(1)[/tex]

[tex]\text{Revenue}=-2000 + 4000[/tex]

[tex]\text{Revenue}=2000[/tex]

Hence, the price to make maximum revenue is 1 and the maximum revenue is 2000.

Maximum revenue generated = $2000

Price at which the maximum revenue is generated = $1

Steps to find the maximum revenue,

Given in the question,

        x = -2000p + 4000

Expression for the revenue generated = Price of one cookie × Number of cookies sold

R = p(-2000p + 4000)

R = -2000p² + 4000p

For the maximum revenue,

"Find the derivative of the expression for revenue and equate it to zero"

R' = -4000p + 4000 = 0

4000p = 4000

p = $1

For p = 1,

R = -2000(1) + 4000

R = $2000

       Therefore, for the price of one cookie as $1, maximum revenue generated will be $2000.

Learn more about the maximization here,

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Answer:

yes

Step-by-step explanation:

If ( x + 5) is a factor of p(x) then p(- 5) = 0

p(- 5)

= (- 5)³ + 4(- 5)² + 2(- 5) + 35

= - 125 + 100 - 10 + 135

= 0

Since p(- 5) = 0 then (x + 5) is a factor of p(x)

Answer:

(x +5 ) is a factor

Step-by-step explanation:

x + 5 = 0

x = -5

P(x) = x³ + 4x² + 2x + 35

P(-5) = (-5)³ + 4*(-5)² + 2*(-5) + 35

      = -125 + 4*25 - 10 + 35

     = -125 + 100 - 10 + 35

     = -25 -10 +35

     = -35 + 35

    = 0

P(-5) = o. So, (x +5 ) is a factor

Answer:

3x3 =9

3 is a prime number, 3x3=9

Answer:

6.0 and the other things that you want me on my way 6.0 and if I can

Answer:

I think it is 6.0

Step-by-step explanation:

Hope this helped have an amazing day/month/year!

Answer:x= 1.5

Step-by-step explanation:

I think

Answer:

X=1.5

Steps:

11x-6=10.5

11x=16.5

x=1.5

Step-by-step explanation:

HERE,

angle A=x+5

angle B=3x

angle C=x

we know that,

sum of three angle of a triangle =180°

According to the question,

[tex]\tt{ x+5+3x+x=180 }[/tex]

[tex]\tt{5x+5=180 }[/tex]

[tex]\tt{ 5x=180-5 }[/tex]

[tex]\tt{5x=175 }[/tex]

[tex]\tt{ x=\dfrac{175}{5} }[/tex]

[tex]\tt{x=35 }[/tex]

So,

[tex]\bold{\angle{B}=3x=3×35=105° }[/tex]