Can some one help me is that correct ?​

Answer:

Marina had 50$ originally

Step-by-step explanation:

80-1/5 of the money she spent for the books that she brought, The step by step process is how much money she had left behind from the books she brought seperate

Answer:

$100

Step-by-step explanation:

Step 1, setting up an equation:

If Marina spent [tex]\frac{1}{5}[/tex] of her money, she has [tex]\frac{4}{5}[/tex] of her money remaining. We also are given that she has $80 left. We can set her initial total amount of money as x to solve this problem:

[tex]\frac{4}{5}x=80[/tex]

Step 2, solving for x:

[tex]\frac{4}{5}x=80\\\\4x=400\\\\x=100[/tex]

We have set x as her original amount of money, so we have the answer!

Marina originally had  [tex]\fbox{100}[/tex] dollars.

I hope this helps! Let me know if you have any questions :)

Answer:

77,786.251

Step-by-step explanation:

Answer:

D. 10, 8, 6, 4, 2, ...

Step-by-step explanation:

f(n + 1) = f(n) - 2

This means that each term is the previous term subtracted by 2,

f(1) = 10

This means that the first term of the sequence is 10.

Thus, the sequence is:

10, 8, 6, 4, 2, ...

Thus the correct answer is given by option D.

I don't know what your looking for, so be more specific, but I'm assuming your solving for x, so that's would be

x = -1

Answer:

We can simply solve all of these by simplifying them :)

1 . 13 - 4x = 1 - x =

x = 4

2 .  7a - 3 = 3 + 6a =

a = 6

3 . 5 + 2x = -2x + 6 =

x = 1/4

4 . -11 + x = 7x - 5 =

x = -1

Answer:

ok

Step-by-step explanation:

why did you put it

Answer:

D. [tex]4^{15}[/tex]

Step-by-step explanation:

[tex]=(4^3)^5[/tex]

Multiply the exponent inside the parenthesis with the exponent outside.

[tex]=4^{15}[/tex]

Hope this helps.

Answer:

4^15

Step-by-step explanation:

Ok, so lets replace the base, 4, with x so we don’t get confused by it:

(X^3)^5

When we raise a power to a power, we multiply them , so:

(X^15)

Remember x is 4, so:

4^15 is the answer

Answer:

11

Step-by-step explanation:

(a+b)^2=a^2+b^2+2ab

a^2+b^2=(a+b)^2-2ab

=5^2-14

=11

Answer:yes it is

Step-by-step explanation:

Answer:

2

Step-by-step explanation:

2 is the answer because the circle touches the line only 2 times.

Hope this helps.

Answer:

exclude any real numbers that result in a negative number in the said radical. set your radical greater than or equal to zero and solve for x.

Step-by-step explanation:

10075 .+#!!#+#!$!$++$7$+"$($(

Answer:

Step-by-step explanation:

A y = -3.6x + 12.8

The line of best fit is,

⇒ y = - 3.6x + 12.8

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Now, Given that;

⇒ y = ax + b.

And, the best fitting line has values of a = - 3.6 and b = 12.8.

Hence, All you need do is put that into the general equation and try different values for it.

So you have y = - 3.6 x + 12.8

Now Let's run a couple of numbers.

The table shows 1 and 9 for the first entry. This means when x = 1, y should come pretty close to nine.

y = - 3.6(1) + 12.8

y = 9.2

Which is not a bad result for x = 1

You might want to check to see if anything else comes closer in your choices. If it does, then you have to try other points.

C

-0.998 = -3.6(1) + 12.8

This answer cannot work. We've already shown that x =1 will leave us close to 9  not -998

So, C is incorrect.

B

y = 12.8x - 3.6

Let x = 1

y = 12.8(1) - 3.6

y = 9.2 is right by coincidence. We must try another value. The hardest one is going to be 5 and - 5

y= 12.8*5 - 3.6

y = 64 - 3.6 which is no where's near - 5.

So B is wrong.

A

y = -0.998(1) + 12.8 Does this give 9 or anywhere near it? 11.802 You might argue that that is not a bad result. So let's try another pair.

x = 3. y should come to somewhere near 2.

y = -0.998 * 3 + 12.8 which comes to roughly nine. You can check this out.

It is not close enough to 2 to be acceptable.

Thus, The correct option is,

⇒ y = - 3.6x + 12.8

Learn more about the mathematical expression visit:

brainly.com/question/1859113

#SPJ7

false

Step-by-step explanation:

ita really false yoooooooooooooo

Step-by-step explanation:

[tex] \frac{135}{100} \times \frac{280}{1} = 378[/tex]

Answer:

LHS×0=RHS×0

0=0

hence,proved

Answer:

A. 32 ft

Step-by-step explanation:

Pythagoras for right-angled triangles (as that is what this is here - the floor from the base of the ladder to the wall, the wall up to where the ladder ends, and the ladder itself as the Hypotenuse).

c² = a² + b²

with c being the Hypotenuse (the side opposite of the 90 degree angle).

so, we know,

c = 40 ft

a = 24 ft

we are looking for B

=>

40² = 24² + b²

1600 = 576 + b²

1024 = b²

b = 32 ft

Answer:

osjdiajsjoasnndosnsnd

Answer:

Option B, The distribution of apple candy can be modeled as normal if Susan picks candies over 75 times

Step-by-step explanation:

The distribution of apple candies can be represented as normal curve and hence the sample proportion for this is true and can be drawn.

The rest other cases do not represent a normal distribution and hence it will not be easy to plot curve for these samples.

hence, option B is correct

Answer:

10 miles

Step-by-step explanation:

10 miles= 16093.44km

44880ft=13.679424km

15560yards= 14.228064

Answer:

-2x^3+x^2+5x-5

Step-by-step explanation:

f(x) = 4 - 2x – 2x^3

g(x) = x² + 7x-9

f(x) + g(x)=4 - 2x – 2x^3+ x² + 7x-9

Combine like  terms

f(x) + g(x) = -2x^3+x^2+5x-5

Step-by-step explanation:

3 29/31 + 9 13/14 * 26 6/7 =0

first 26 6/7 = 26 13/14

3 29/31 +( 26 13/14 * 9 13/14)

3 29/31 + 266 32/49

Answer :

270 894/1519 / 270.5585 / 411024/1519

Answer:

(f+g)(x) = x - 7

Step-by-step explanation:

it is simple - when adding 2 functions your simply add both expressions. and the result is then the function of the sum.

the same applies also to other arithmetic operations.

-3x -5 + 4x - 2 = x - 7

Answer:

the scale factor is

-2 and

-4

Answer:

The equation of the line is, "y = 5/3x."

Step-by-step explanation:

Here are the pictures of the graph and points attached:

Answer:

a

Step-by-step explanation:

because the diagram the length decimal place degree

Answer:

First equation has extra 6s and this extra 6s=54-42=12

6s=12. s=2

Step-by-step explanation:

6*2+10t=42 ........ 10t=30 t=3

Answer:

s = 2 and t = 3

Step-by-step explanation:

Assuming you were suppose to type s instead of a,

12s + 10t = 54 -- (1)

6s + 10t = 42 -- (2)

(1) - (2) : 6s = 12

               s = 2 -- (3)

Substituting (3) into (2),

12 + 10t = 42

10t = 30

t = 3 -- (4)

Therefore, s = 2 and t = 3

If this helps you, please mark brainliest!

Have a nice day!

Answer:

1,944

Step-by-step explanation:

72x27=1,944

Have a wonderful day or night

Answer

1944

Step-by-step explanation:

72*27 = 1944

the image above should clarify how you're actually supposed to do it! couldn't submit this without 20 characters :,)

Answer: hello your question is poorly written attached below is the complete question

answer:

i) Degrees of freedom : 2, 46 , 44

ii) Mean square : 650 , 13.4

iii) F = 47.65

Step-by-step explanation:

First treatment = 12 experimental units

Second treatment = 15 experimental units

Third treatment = 20 experimental units

completing  the analysis

i) Degree of freedom

for Treatments = 3 - 1 = 2

for Total = ( 12 + 15 + 20 ) - 1 = 47 - 1 = 46

for error = 46 -2 = 44

ii) Mean square

  for treatments = sum of squares / degree of freedom = 1300/2 = 650

  for error = 600 / 44 = 13.64

iii) F

= Ms of treatment / Ms of error

= 650 / 13.64 = 47.65

Answer:

x+120°+20°=180°[ sum of interior angle of triangle]

x+140°=180°

x=40°

then,

x+y= 180°[being straight line]

40°+y= 180°

y=140°