Please solve the question.

Answer:

10

20

Step-by-step explanation:

correct c=3 x 10

incorrect i=-1

-------

incorrect= 10

number of questions= 10+10= 20

Answer:26 units

Step-by-step explanation:

Answer:

23.4375

Step-by-step explanation:

you need to do base x base x height divided by 2. 7.5 x 2.5 x 2.5 = 46.875. divide that by 2 and you get 23.4375  

Answer:

315

Step-by-step explanation:

No. of girls be g

No. of boys be b

g= 180

g/b = 4/3

b = 3g/4

b= 3(180/4)

b= 3*45

b= 135

.

Find b+g

= 135 + 180

= 315

Answer:

y = -10

Step-by-step explanation:

To solve this, you must find the value of x first. To do this you must move the first equation so that x is by itself.

-2x + 3 = 7

Subtract 3 from both sides:

-2x = 4

Divide both sides by -2:

x = -2

Now plug in -2 for x into the second equation, like so:

3x + 1 = 5 + y

3(-2) + 1 = 5 + y

-6 + 1 = 5 + y

Add like terms:

-5 = 5 + y

Subtract 5 from both sides:

-10 = y

The value of y for the given system of equations is -10.

There are many different ways to define an equation. The definition of an equation in algebra is a mathematical statement that demonstrates the equality of 2 mathematical expressions.

In another word, the equation must be constrained with some constraints.

As per the given,

-2x + 3 = 7 and 3x + 1 = 5 + y

-2x = 7 - 3

x = -2

Substitute as

3(-2) + 1 = 5 + y

y = -6 + 1 - 5

y = -10

Hence "The value of y for the given system of equations is -10".

For more about the equation,

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Answer:

15.59

Step-by-step explanation:

The answer is 15.59 because to find the area of an equilateral triangle, you need to multiply the height by the length. In this scenario, the length is 6, and we need to find the height. Since we know that all of the sides of the equilateral triangle are 6, we can put a line dividing the equilateral triangle exactly in half as our height. This will form 2 triangles, and each of them will have a length of 3, and a slant height of 6. They would also be right triangles. Now, with this information you can do pythageroum thereom to find the height:: 3^2 + h^2 = 6^2. So, h = √27. Now, to find the area of a triangle, you must multiply the length by the height and then divide by 2. So (6 • √27)/2 is equal to 15.5884572681, which rounded is equivalent to 15.59. So the answer is 15.59.

Answer: =

x

2

−

4

x

−

21

Step-by-step explanation: (

x

+

3

)

.

(

x

−

7

)

=

(

x

)

.

(

x

−

7

)

+

(

3

)

.

(

x

−

7

)

ANSWER

x^2-4x-21

EXPLAIN

First expand the brackets by multiplying the number from the first bracket to the second bracket

you will get this = x^2 + 3x- 7x- 21 ,then u collect the like terms which is (3x & -7x).

your answer ( x^2 - 4x - 21 ).

Answer:

c = 3

c = -3

(There are two because absolute value :P)

Step-by-step explanation:

u = 7i + 24j

u = (7, 24)

||c * u|| = 75

75 = || c [tex]\sqrt{7^{2}+24^{2} }[/tex] ||

75 = || c [tex]\sqrt{625}[/tex] ||

75 = || c * 25 ||

3 or -3 = c

Answer:

group A has longer average

Step-by-step explanation:

the average for group A : 11+11+12+12+12+12+13+13+13+13= 122/10=12.2

the average for group B : 10+10+10+10+10+11+11+12+12+12=108/10=10.8

Answer:

group A has longer average

Step-by-step explanation:

[tex]a_1[/tex] is the first term of the sequence, which is [tex]\boxed{-4}.[/tex]

[tex]r[/tex] is the common ratio of the sequence, the number that you multiply one term by to generate the next term. Here, we see that multiplying by -2 will generate the next term, so [tex]\boxed{r=-2}.[/tex]

We use the formula [tex]S_n=\frac{a_1(r^n-1)}{r-1}[/tex] to find the sum of the first 6 terms - just plug in our values for [tex]a_1[/tex] and [tex]r:[/tex]

[tex]S_6=\frac{-4((-2)^6-1)}{-3}=\frac{-4(63)}{-3}=\boxed{84}.[/tex]

Answer:

Step-by-step explanation:

Given y=2x(Let's call this eqn1) and y=x+4(eqn2)

We can substitute eqn1 in eqn2 to get

2x=x+4

2x-x=4

x=4

Substitute the value x in eqn1

y=2x

y=2(4)

y=8

Answer:

C. (4, 8)

Step-by-step explanation:

→Plug in y = 2x into y = x + 4, like so:

y = x + 4

2x = x + 4

→Subtract x from both sides:

x = 4

→Now plug in 4 for x into one of the equations (doesn't matter which one):

y = 2x

y = 2(4)

y = 8

Answer:

... ...................

Answer:

I think the area is 12 units.

Step-by-step explanation:

Anyone correct me if I'm wrong!

So, I started with 6 times 2 is 12 but since it's a triangle, you have to divide it by 2 . Cause if you cut a square or rectangle, it will become a triangle.

So, 6 for half of the rectangle.

Then in the middle it's a square so 2 times 2= 4.

That square is 4.

Last one would be half a square, so 2 times 2= 4. Divide it in half, you get 2.

That part is 2.

Then I think you have to add all of them, 6+4+2=12

So  I think it's 12 units??

Answer:

There are 3 shapes in the figure.

1 scalene triangle

1 equilateral triangle

1 square

the formula to find the area of a triangle is 1/2 x base x height:

Area of scalene triangle: 1/2 x 6 x 2 = 6 units^2

Area of equilateral triangle: 1/2 x 2 x 2 = 2 units ^2

Area of square: (base x height)

Area of square: 2 x 2 = 4 units^2

Then add up all the areas:

6 units^2 + 2 units^2 + 4 units^2 = 12 units^2

So the area of the entire figure is 12 square units.

pls mark brainliest if this helped :)

Answer:

11/5 x^2 + 5/2 xy + 3/2 y.

Step-by-step explanation:

2x . (x+y) + 1/5 x.x + 1/2 y . (x + 3)

= 2x^2 + 2xy + 1/5 x^2 + 1/2xy + 3/2 y

= 11/5 x^2 + 5/2 xy + 3/2 y.

Answer:

Circumference of a circle = πd

d=diameter

56.52=3.142d

d=17.98 inches d=18 inches

Answer:

18 in.

Step-by-step explanation:

If you do the math, you'd actually get 17.99 inches lol. Just round your answer to 18 since it's THAT close to 18.

Answer:

96 cartons

Step-by-step explanation:

Capacity of one jug = 4 L

Capacity of 6 jugs = 4 * 6 = 24 L

Capacity of milk in the container = 24 L

one litre = 1000 ml

24 liter = 24 * 1000 = 24000 ml

Number of cartons = Total capacity of milk/Capacity of milk in one carton

                               = 24000÷250

                               = 96 cartons

1 container receives 6 jugs of milk (1 jug of milk=4L)

6×4L=24L

The 1 container of milk is used to fill cartons of milk

The 1 container of milk is used to fill cartons of milk (1 carton=250 ml)

Step 1; Convert ml to L

250ml ÷ 1000 = 0.25L

Step 2; Divide

24L ÷ 0.25L = 96

Ans: 96 cartons of milk can be filled.

Answer:

Should be B...add x

the answer is A. it is asking for the incorrect answer therefor all are correct except A.

Answer:

A got it right

Step-by-step explanation:

Answer:

She bought 4 steaks and 8 watermelons, hope this helps

Step-by-step explanation:

Step-by-step explanation:

Answer is $17.5

It says Mrs. Samuelson had $350 to spend on a field trip for herself and 18 students. so there are 19 people. Multiply 12.50*19 you get 237.5.

It also says lunch cost about $5.00 per person. Multiply 5.00*19 you get 95.

Add 95 to 237.5.

You get 332.5

Subtract 350 by 332.5.

Equation: 350-(19*12.50)+(19*5.00)

Answer: $17.5

Answer:

D. Move each digit of the whole number three places to the left and fill in the blank places with zeros.

Step-by-step explanation:

Take the number 5 for example.

If you multiply this by 1,000 you get 5,000.

You may do this by moving the digit 3 places to the left which will give you

5---, then you replace the empty spaces with zeros.

Answer:

c  tomato 2.5

pepper = 3.5

Step-by-step explanation:

Let t= the price of tomato plants

p  =the price of pepper plants

3t+ 4p = 21.50

5t+ 2p = 19.50

Multiply the second equation by -2

-10t -4p =-39

Add this to the first equation to eliminate p

-10t -4p =-39

3t+ 4p = 21.50

---------------------

-7t    = -17.5

Divide by -7

t = 2.5

Now find p

5t+ 2p = 19.50

5( 2.5) + 2p = 19.50

12.5+2p = 19.50

Subtract 12.5 from each side

2p =7

p =3.5

We want the price of 1 tomato and 1 p

3.5+2.5

Answer:

C

Step-by-step explanation:

Let t = price of tomato plants

and p = price of pepper plants

3t + 4p = 21.50 ...... (1)

5t + 2p = 19.50 ..... (2)

Multiplying eqn. (2) by - 2

(5t + 2p) * (- 2) = (19.50) * (- 2)

- 10t - 4p = - 39

-10t - 4p = - 39

3t + 4p = 21.50

____________

-7t    = -17.5

t = 2.5

Putting t = 2.5 in eqn. (2), we get:

= 5 * (2.5) + 2p = 19.50

12.5 + 2p = 19.50

2p = 7

= 3.5

Price of one tomato and one pepper plant = 3.50 + 2.50

Answer:

Even if they are different weights they will fall at the sam time

Step-by-step explanation:

by fall I mean hit the ground

Answer:

17.91

Step-by-step explanation:

Answer:

(7, 32) and (2, 12)

Step-by-step explanation:

y = 4x + 4

y = x² - 5x + 18

4x + 4 = x² - 5x + 18

x² - 9x + 14 = 0

14 = (-7)(-2)

-9 = -7 + (-2)

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

x= 7, x = 2

For x = 7

y = 4x + 4  = 4*7 + 4 = 32

(7, 32)

For x = 2

y = 4x + 4 = 4*2 + 4 = 12

(2, 12)

Check:

y = x² - 5x + 18

(7, 32)

32 = 7² - 5*7 + 18

32= 32 true

(2, 12)

12 = 2² - 5*2 + 18

12 = 12 true

Answer:

(7, 32) and (2, 12)

Step-by-step explanation:

Answer:

y=120

z=120

x=120

p=60

Step-by-step explanation:

y=120

z=120

x=120

p=60