CAN SOMEONE PLEASE HELP ME OUT WITH THIS I NEED 3 AND4

Step-by-step explanation:

The sum of ages of two friends is 13 years.

The product of their ages is 42.

Let the age of 1st friend and 2nd friend is x, y respectively.

1 st condition= The sum of ages of two friends is 13 yrs.

i.e x+y = 13........ (I)

2nd condition= The product of their ages is 42.

i.e X*y = 42........(ii)

From equation (I)

X+y = 13

or, X = 13-y........ (iii)

Putting the equation (iii) in equation (ii).

X*y= 42

(13-y) * y = 42

13y - y^2 = 42

[tex] {y}^{2} - 13y + 42 = 0[/tex]

[tex] {y}^{2} - (7 + 6)y + 42= 0[/tex]

[tex] {y}^{2} - 7y - 6y + 42 = 0[/tex]

[tex]y(y - 7) - 6(y - 7) = 0[/tex]

[tex](y - 6) (y - 7) = 0[/tex]

Either; y-6 = 0

y = 6

Or;

y-7=0

y = 7

Keeping the value of y as "7" in equation (ii)

x*y = 42

7x = 42

X = 42/7

Therefore, the value of X is 6.

Therefore, either 1st friend is 6 years and 2nd is 7 years.

Hope it helps...

Answer:

380

Step-by-step explanation:

Find 1% of e:

180 / 45 = 4

Find 95% of e:

4 * 95 = 380

Answer:   The height is 3  units.

Step-by-step explanation:

By using the give figure we can form right angle out of the whole figure  with a base of  4  and an hypotenuse of 5.

By using this information we can use the Pythagorean Formula to find the height

a^2 + b^2 =c^2     a= base, b = height and c will be the hypotenuse.

4^2 + b^2 = 5^2     Solve for B

16  + B^2 = 25  

-16               -16

    b^2 = 9    

    b = [tex]\sqrt{9}[/tex]  

  b  = 3

The height, h, of the triangular prism is 3 units.

Isosceles triangles are those triangles that have at least two sides of equal measure and two base angles are equal.

Given that, vertical cross-section of the triangular prism shown in the given figure is an isosceles triangle.

Here, equal sides of an isosceles triangle is 5 units and base of the isosceles triangle is 8 units.

By using Pythagoras theorem,

5²=h²+4²

25=h²+16

h²=9

h=3

Therefore, the height, h, of the triangular prism is 3 units.

To learn more about an isosceles triangle visit:

https://brainly.com/question/10147636.

#SPJ7

Answer:

y = -0.5x + 2

Step-by-step explanation:

m=(y2−y1)/(x2−x1)

m=(1-2)/(2-0)

m (slope) = -1/2 or -0.5

y = mx + b (we need b now, y-int)

1 = -0.5(2) + b

b - 1 = 1

b = 2

Now we have the slope (m) and the y-intercept (b), we can rewrite it as such:

y = -0.5x + 2

Hope this helped!

*Remember the equation of a line in slope-intercept form is y=mx+b. In this problem, we found the slope and y-intercept.

Answer:

B<102

Step-by-step explanation:

Lets write this as an equation: 98-b >-4

Lets simplify: -b>-102

Lets find out for b: b<102

BTW we switched signs because we are dividing by a negative.

Answer:

10 feet

Step-by-step explanation:

You use the pythagorean theorem to find the missing side of a right triangle.

side^2 + side^2 = hypotenuse ^2

6^2 + 8^2 = X^2

36 + 64 = 100

square root of 100 = 10

9514 1404 393

Answer:

  $10.75

Step-by-step explanation:

The amount they left as a tip is ...

  25% × $43 = 0.25 × $43 = $10.75 . . . tip amount

Answer:

Step-by-step explanation:

To find the transformation, compare the function to the parent function and check to see if there is a horizontal or vertical shift, reflection about the x-axis or y-axis, and if there is a vertical stretch.

horizontal shift- right four units

vertical shift- up 2 units

Reflection about the x-axis: None

Reflection about the y-axis: None

Vertical Compression or Stretch: Stretched

Answer:

f(x) + g(x) = x² - 10x + 9

General Formulas and Concepts:

Algebra I

Step-by-step explanation:

Step 1: Define

f(x) = x² - 11x + 18

g(x) = x - 9

Step 2: Find f(x) + g(x)

Answer:

15 + 3m = c i think is suitable

9514 1404 393

Answer:

  $0.50/lb

Step-by-step explanation:

The increase in cost is $40-25 = $15 for an increase in weight of 50-20 = 30 lb. That makes the cost per pound be ...

  cost/pounds = $15/(30 lb) = $0.50/lb

Answer

25/9

Step-by-step explanation:

70 + 20 =90

25/9 x 90 = 250

Answer:

she can buy 4 e books.

I don't know about the equation but there is the work below if that helps.

Step-by-step explanation:

8x 1.29= 10.32

60-10.32=49.68

49.68/ 9.95= 4.99

she can buy 4 books.

Answer:

um i have this question so i dont know

Step-by-step explanation:

Answer:

d [tex]\geq \\[/tex]-39

Step-by-step explanation:

d/13[tex]\geq \\[/tex]-3

multiply both sides by 13

d [tex]\geq[/tex] 13(-3)

d [tex]\geq[/tex] -39

hope this helps

Answer:

Using equivalent fractions, the time Matt takes to eat 1 pie is 1200/11 which is the same as [tex]109\frac{1}{11}[/tex] seconds

Step-by-step explanation:

The number of pies Matt eats = 2.75 pies

The time duration Matt eats 2.75 pies = 300 seconds

Mathematically, the time duration for Matt to eat one pie is given as follows;

The time to eat 2.75 pies = 300 seconds

Dividing both sides of the equation by 2.75 gives;

The time to eat 2.75/2.75 pie = 300/2.75 seconds

2.75/2.75 = 1, therefore, we have;

The time to eat 1 pie = 300/2.75 seconds

The equivalent fraction of 3000/2.75 = 1200/11

Therefore;

The time Matt takes to eat 1 pie = 1200/11 seconds

Answer: x = 5

Step-by-step explanation:

Hey there! If you have any questions, feel free to let me know in the comments.

Step 1: Simplify  20 - 4x - 15 - 4x  to  5 - 8x.

5 - 8x = -6x - 45 + 8x

Step 2: Simplify -6x - 45 + 8x to 2x - 45.

5 - 8x = 2x-44

Step 3: Add 8x to both sides.

5 = 2x - 45 + 8x

Step 4: Simplify 2x - 45 + 8x to 10x - 45.

5 = 10x - 45

Step 5: Add 45 to both sides.

5 + 45 = 10x

Step 6: Simplify 5 + 45 to 50.

50 = 10x

Step 7: Divide both sides by 10.

50/10 = 10x/10

Step 8: Simplify 50/10 to 5.

x = 5

Answer:

Step-by-step explanation:

Here you go mate

step 1

20-4x-15-4x=-6x-45+8x  equation

step 2

20-4x-15-4x=-6x-45+8x  simplify for x

20+(-4x)+(-15)+(-4x)=(-6x)+(-45)+8x

step 3

(-4x+-4x)+(20+(-15)=(-6x+8x)+(-45)  add brackets to seperate the equations

step 4

-8x+5=2x+-45  combine the terms that are alike

step 5

-8x+5(-2x)=2x-45(-2x)  subtract -2x(the ones in the brackets)

-10x+5=-45

step 6

−10x+5(-5)=−45(-5)  subtract -5

-10x=-50

step 7

-10x/-10=-50/-10  divide by -10

step 8

50/10  Divide

Answer

x=5

Answer:

1 cookie = $1.25    1 cake = $15

Step-by-step explanation:

set up a system of equations:

let x = 1 cookie

let y = 1 cake

3x + 5y = 78.75

8x + 2y = 40

I multiplied the first equation by 2 to get:  6x + 10y = 157.50

I multiplied the second equation by -5 to get:  -40x - 10y = -200.00

If you add both equations, the y-terms will be eliminated

-34x = -42.50

x = 1.25

Plug in 1.25 into equation to find value of y:  8(1.25) + 2y = 40

                                                                           10 + 2y = 40

                                                                            2y = 30

                                                                             y = 15

Answer:

15cm and 12cm

Step-by-step explanation:

From the question,The ratio of the length and breadth of a rectangle is 5 to 4

We assume The Lenght of the field= 5x

The breadth = 4x

Area= (5x × 4x)= 180

20x^2= 180

X^2=

X= √9

X=3cm

The Lenght of the field= 5×3= 15cm

The breadth = 4×3=12cm

Answer: I'm sure that x should be 30. And 42 should be 7. Then you can figure out what percent 7 is of 30.

Answer:

the mean would increase

Step-by-step explanation:

it would increase because you add up and devid by how many numbers you have

Answer:

85km/h (km per hour)

Step-by-step explanation:

425/5

85km/h

Answer:

$495

Step-by-step explanation:

65% of $300= 195

300+195=$495

Answer:

Stefan uses 500 grams of sugar with 10 egg whites.

Step-by-step explanation:

Given that Stefan is using 50 grams of sugar with one egg white.

In order to find the quantity of sugar for more eggs, we have to multiply the amount of sugar for one egg with number of eggs.

Now,

We have to find the quantity of sugar for 10 eggs.

[tex]Sugar\ for\ 10\ eggs = 10*50 = 500[/tex]

Hence,

Stefan uses 500 grams of sugar with 10 egg whites.

Answer:

500 grams

Step-by-step explanation:

Answer: Inferential

Step-by-step explanation:

Inferential statistics, has to do with taking data from the samples that the researcher has and then making generalizations about the population through the sample gotten.

Through Inferential statistics, one can draw conclusion about a particular phenomenon. Therefore, the answer to the above question is Inferential statistics

.

Answer:

22?

Step-by-step explanation:

just follow PEMDAS. first multiply then divide then add then subtract

Answer: 6

Step-by-step explanation:

Answer:

Step-by-step explanation:

so 110

110/100=1.1

*15

16.5

16.5 dollar coupon

ok then sales tax

1.1*6.25

6.875

sales tax is 6.875

110-16.5

93.5

93.5+sales tax 6.875

100.375

final price 100.375

hope this helps!!

Answer:

(f + g)(x) = x² + 4x - 4 ⇒ B

Step-by-step explanation:

Let us solve the question

∵ f(x) = 4x + 4

∵ g(x) = x² - 6

→ We need to find (f + g)(x) which means f(x) + g(x)

∴ (f + g)(x) = f(x) + g(x)

∵ f(x) + g(x) = (4x + 2) + (x² - 6)

∴ f(x) + g(x) = 4x + 2 + x² - 6

→ Add the like terms

∵ f(x) + g(x) = 4x + x² + (2 - 6)

∴ f(x) + g(x) = 4x + x² + (-4)

→ Remember (+)(-) = (-)

∴ f(x) + g(x) = 4x + x² - 4

→ Arrange the terms from greatest power of x

∴ f(x) + g(x) = x² + 4x - 4

∴ (f + g)(x) = x² + 4x - 4