whats the answer to this?

The factored form of the expression would be; (7x + 2√5) (7x - 2√5)

Those expressions that might look different but their simplified forms are the same expressions are called equivalent expressions.

To derive equivalent expressions of some expressions, we can either make it look more complex or simple. Usually, we simplify it.

We need to factor the expression form 49x² + 20

Therefore, 49 is a perfect square,

This expression could also be given as;

(7x)²- (2√5)²

Now, we know that:

a²- b² = (a + b) (a - b)

Now plug the values then we have:

(7x)²- (2√5)² = (7x + 2√5) (7x - 2√5)

Hence, the factored form of the expression would be; (7x + 2√5) (7x - 2√5)

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The factored form of the expression 49x² + 20 will be (7x - 2i√5) and (7x + 2i√5). Then the correct option is B.

Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.

It is a method for dividing a polynomial into pieces that will be multiplied together. At this moment, the polynomial's value will be zero.

The expression is given below.

⇒ 49x² + 20

The expression can be written as,

⇒ 49x² - 20i²

Simplify the expression, then we have

⇒ 49x² - 20i²

⇒ (7x)² - (2i√5)²

⇒ (7x - 2i√5)(7x + 2i√5)

The factored form of the expression 49x² + 20 will be (7x - 2i√5) and (7x + 2i√5). Then the correct option is B.

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2 1/4 x 1 1/3 = 9/4 x 4/3 = 3/1 x 1/1 = 3/1 or 3

Key: Keep, change, flip

Answer:

2 4/12  or if simplified 2 1/3

Step-by-step explanation:

Answer: Equilateral triangles are also right triangles sometimes. All angles of an equilateral are congruet sometimes.

Answer:

Hooke

Hope This Helps!

Answer:

Hooke

Step-by-step explanation:

pls dont get mad if im wrong im just here to help :)

Answer:

1 cupcake is made in 1.75 minutes.

1.75 minutes

Step-by-step explanation:

Divide 70 by 40 = 1.75.

49/28=1.75

The constant of proportionality of the given data is 0.57.

The constant of proportionality is the ratio of two proportional values at a constant value.

Now it is given that,

Time taken for icing 40 cupcakes = 70 minutes

∴ Icing of cupcakes in 1 minute = 40/70

                                                    = 0.57

Time taken for icing 28 cupcakes = 49 minutes

∴ Icing of cupcakes in 1 minute = 28/49

                                                    = 0.57

⇒ constant of proportionality = 0.57

Thus, the constant of proportionality of the given data is 0.57.

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A fraction is really just another way to write a division problem without dividing. So all you have to do is divide, then round to whichever decimal place your teacher wants.

Answer:

3y +9 = perimeter

Step-by-step explanation:

Answer:

4y+9

Step-by-step explanation:

To find the perimeter , you have to add up all the 4 sides

so y + y+2 + y+4 + y+3 = 4y+ 9

hope it helps

Answer:

3:9

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

27:81

= 27/81

=3/9

=3:9

it could be reduced to 1:3 but because the alternatives does not include, it 3: 9

please reward me by marking me as the brainliest.

Answer:

1/9

Step-by-step explanation:

Answer:26.85 miles

Step-by-step explanation: 7.25+12.3+7.3=26.85

Answer:

x = -14/3

Step-by-step explanation:

2 (4x-2) - 5x = -18

8x - 4 - 5x = -18

8x - 5x = -18 + 4

3x = -14

x = -14/3

I'm not sure if this is what you were asking for but, ya..

Answer:

$1540

Step-by-step explanation:

3/2 x 11/2 = 19 1/4

19 times 4 to find how many 1/4s fit in 19 = 76

Add 1/4 = 77

77 x 2 = 154 feet

154 x 10 = $1540

Answer:

1,120

Step-by-step explanation:

I don’t really know but it’s 1,120

If i just knew the answer i would tell you buti dont know sorrry

Answer:

1. A. 9

B. - 51

2. A. (-3,2)

B. (5,-2)

3. A. (11,-3) B. (11,1) C. They have the same x

Answer:

1.33

Step-by-step explanation:

480 divided by 360 gets you 1.33

Answer:

Each ribbon costs $0.75.

Step-by-step explanation:

All you need to do solve the problem is divide 360/480 = 0.75.

To check your answer, multiply 0.75 by the number of ribbons sold:

0.75 x 480 = 360

I hope this helped! If it did, please consider rating my answer and pressing thanks. Have a fantastic day!

Answer:

Approx. 73°

Step-by-step explanation:

Step-by-step explanation:

let eqn be y = mx + b.

m = (-2 - 8)/(1 - 3) = 5

sub (3, 8):

8 = 5(3) + b

b = -7

therefore equation of the line is y = 5x - 7

Topic: coordinate geometry

If you like to venture further, feel free to check out my insta (learntionary). I'll be constantly posting math tips and notes! Thanks!

Answer:y = 5x - 7

Step-by-step explanation: /

Answer:

24 would prefer CREST

6 woul NOT prefer Crest

Step-by-step explanation:

4:5=x:30

Answer: 2

Step-by-step explanation:

Answer:

s=40w+350; s=$1,070

Step-by-step explanation:

Our equation looks like this:

s=40w+350

Next we plug in 18 for w, our number of weeks.

s=40(18)+350

Multiply the 40 and 18.

s=720+350

Add the 350 and 720.

s=1,070

Add a dollar sign to say that the amount is in dollars.

s=$1,070

HTH :)

The equation relating the total amount of money in the savings account, S and the number of weeks Yoko has been adding the money, W is given by S = 350 + 40W.

Total amount of money in the savings account after 18 weeks is

An equation is a statement in mathematics which includes two algebraic expressions or numbers relating with an equal sign.

There are left hand side and right hand side for every equation and may or may not include variables.

S is the total amount of money in the savings account of Yoko.

W is the number of weeks Yoko has been adding money.

Initial money = 350

After 1 week total money = 350 + (1 × 40)

After 2 weeks, total money = 350 + (2 × 40)

It goes on like this until the last week.

So after W weeks total money = 350 + (W × 40)

Total amount of money in the savings account after W weeks, S = 350 + 40W.

After 18 weeks, S = 350 = (40 × 18) = $1070

Hence the equation relating W and S is, S = 350 + 40W.

Total amount of money after 18 weeks = $1070

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Answer:

x=4 y=0

Step-by-step explanation:

3x+5y=12

-(x-3y=4)

3x+5y=12

3(-x+3y=-4)

3x+5y=12

-3x+9y=-12

14y=0

y=0

Then, substitute the y into the equation to find x

x-3(0)=4

x=4

Answer:    $1,147.20.

Step-by-step explanation:

The total amount accrued for principal plus interest in the calculation simple interest

= principal * (1+ rate * number of years)

= $800 *(1+ 6.2% * 7)

= $1,147.20.

Hopefully his helped, if not HMU and I will try my best to get u a better answer! :)

Answer:

78

Step-by-step explanation:

do 9 x 8= 72

then 72 + 6= 78

Answer:

16

Step-by-step explanation:

We can calculate the value of x using Euclidean theorem

15^2 = 9 × (x+9)

225 = 81 + 9x subtract 81 from both sides

144 = 9x divide both sides by 9

16 = x

Answer:

???????................ .mm

Answer:

???????................ .mm

Step-by-step explanation:

Answer:

Thanks for the free points

Answer:

So, the answer for b is 20.

The way to figure this out is:

angle N is congruent to angle S

angle M is congruent to angle M

side NM is 10

because of the three things above, triangle NHM is congruent to triangle SML because of SAS(side angle side postulate)

Hope that helps! Let me know if it does! ;P

Answer:

-19.68

Step-by-step explanation:

(0.2 + (-5) × (4.1)

-4.8 × (4.1)

-19.68

Answer:

-19.68

Step-by-step explanation:

(0.2 + (-5)) * (4.1)

(-4.8) * (4.1)

-19.68

When given the equation where you have to add a negative, it's similar to subtraction. Where the positive number will be subtracted from the negative number.