Evaluate the expression 7x2y, when x = 3 and y = 4.

168
252
336
794

Answer:

.

Step-by-step explanation:

well let’s think about it this way. we can take the like numbers and add or subtract them right? so let’s think of all the like numbers.

3x, -2x, and 2x are like numbers

2y, and 2y are like numbers

2 and 2 are like numbers.

now that we have all of the like numbers down, lets start with the first set of numbers before the = sign.

3x+ 2y- 2x+ 2

well since we have 2 like numbers in there, let’s add those, so we have 3x + 2x, which that would give us 5x. since we have nothing else in that, out expression for that one would be 5x + 2y + 2. next one we have:

3x - 2x+ 2y+ 2

we have like factors in this one too. since we have a subtraction sign in between them, we have to take 3x - 2x which gives us 1x or x. which that expression would be (x + 2y + 2). if you have to add the expressions together the whole thing would be (6x + 4y + 4).

if the (-) is supposed to be a negative, then the problems would be, x + 2y+ 2; x + 2y + 2. which the ending would be 2x + 4y + 4. hope this helps. if i’m wrong someon correct me.

Answer:

y = 50x

x = y ÷ 50

Step-by-step explanation:

y - (-250) = 50(x - (-5))

y + 250 = 50(x + 5)

y + 250 = 50x + 250

y = 50x + 250 - 250

y = 50x

x = y ÷ 50

Answer:

y-(-250)=50(x-(-5))

y+250=50x5

y+250=250

Step-by-step explanation:

as we know that -,-=+ so i use same formula

Answer:

hi

Step-by-step explanation:

i think

[tex] \frac{16}{25} [/tex]

have a nice day

Answer:

[tex]\frac{16}{25}[/tex]

Step-by-step explanation:

We have four fractions and are asked to find the next one in the sequence.

So we see that 8/25 and 10/25 are together, which then follows up with 12/25 and 14/25.

Do we see a pattern? Yes indeed, the numerator is going up two values of every sequence, therefore we need to add 2/25 to 14/25 to find the next fraction.

[tex]\frac{14}{25} + \frac{2}{25}[/tex]

[tex]\frac{16}{25}[/tex]

Answer:

3,040$

Step-by-step explanation:

20k*.1=2,000

8k*.13=1,040

2,000+1,040=3,040

I am so sorry if I'm wrong.

Answer:

BGHA

Step-by-step explanation:

You have to find all of the coordinates first in the order they are written:

(0,4)

(-4,3)

(2,0)

(0,-1)

Now use the code at the right to find the letters for each coordinate:

(0,4) B

(-4,3) G

(2,0) H

(0,-1) A

Now write it in this order (all caps): BGHA.

Hope it helps and is correct!

Answer:

1, 2, 3, 4

Step-by-step explanation:

Answer:

Step-by-step explanation:

Since (most) people have 4 limbs you simply multiply the values on the left by 4. For the values on the right divided by 4:

2   8

4   16

8   32

8   32

Answer:

125

Step-by-step explanation:

i looked it up

Answer:

the one u clicked was the answer

Answer: Is it to late for me to answer it .

Step-by-step explanation: but divide my the numbers and multiply the exponits

Step-by-step explanation:

Answer:

1 11/15

Step-by-step explanation:

2/5x3=6/15

1/3x5=5/15

add them both up and you get 1 11/15

Answer:

1 11/15

Step-by-step explanation:

you convert 2/5 and 1/3 denominators till they are the same, which is 15

then you have to times the numerator by how much you times the denominator

times 2/5 numerator by 3, and 1/3 numerator by 5  

then you add them together which makes 1 11/15

Answer:

Pretty sure it's 2.5%

Step-by-step explanation:

Answer:

if it depends on how much access you have to clean water, I'd say a since both the median and all qaurtile seem to be higher.

Step-by-step explanation:

Answer: A

Step-by-step explanation:

Answer:

the correct answer is b

Step-by-step explanation: because in the image

                                               X --- ---

so that is X - 6

Answer:

54 cubic feet

Step-by-step explanation:

Answer:

Newer locker by 1 cubic foot

Step-by-step explanation:

3 · 3 · 6 = 54 ft³

2.5 · 5.5 · 4 = 55 ft³

55 ft³ - 54 ft³ = 1 ft³

Answer:

the numbers are like terms because they both do not have variables nor exponents.

LIke terms are numbers or vairables with the same variables or powers.

Step-by-step explanation:

Here are some examples of like terms

23x and 15x

both of these are like terms because they both have the same vairable of x.

[tex]15^{4}[/tex] and [tex]20^{4}[/tex]

These are both like terms because the powers are both 4.

[tex]x^{2}[/tex] and [tex]x^{2}[/tex]

These are both like terms because the variables both have the same powers which are both 2.

Feel free to ask quesitons - Mark

Answer:

it is 46 ,101,79,59 starting from left side angle

Answer:

24.5 pizzas

Step-by-step explanation:

588/12

and then 49/2

I'll do problem 1 to get you started.

The answer to problem 1 is 3400 miles

============================================================

Explanation for problem 1:

We're asked to find the perimeter, which is the total distance around the exterior or outside. In other words, we need to add up the four side lengths of this quadrilateral.

We'll need the distance formula to find the lengths of the slanted sides AB and BC

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

Let's first find the length of segment AB

A = (x1,y1) = (0,0)

B = (x2,y2) = (400,300)

d = Length of AB

[tex]d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(0-400)^2 + (0-300)^2}\\\\d = \sqrt{(-400)^2 + (-300)^2}\\\\d = \sqrt{160000 + 90000}\\\\d = \sqrt{250000}\\\\d = 500\\\\[/tex]

The distance from A to B is 500 miles. This is the same as saying segment AB is 500 miles long.

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

Now find the length of segment BC

B = (x1,y1) = (400,300)

C = (x2,y2) = (-800,800)

d = length of BC

[tex]d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(400-(-800))^2 + (300-800)^2}\\\\d = \sqrt{(400+800)^2 + (300-800)^2}\\\\d = \sqrt{(1200)^2 + (-500)^2}\\\\d = \sqrt{1440000 + 250000}\\\\d = \sqrt{1690000}\\\\d = 1300\\\\[/tex]

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

The length of CD is fairly easy to find without needing the distance formula. This is because it is a vertical line. We subtract the y coordinates of C and D to get 800-0 = 800. So CD is 800 miles long.

Segment DA is a similar story. But we subtract the x coordinates. This only works for horizontal lines. DA is 800 miles long because |-800-0| = 800. Absolute value is used to make sure the distance is never negative.

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

To summarize everything so far, we found these four side lengths

The perimeter is going to be the sum of those four sides, leading to...

perimeter = sum of sides

perimeter = AB+BC+CD+DA

perimeter = 500+1300+800+800

perimeter = 3400 miles

This is the total distance traveled if you started at city A, went to B, then to C, then to D, and then finally went back to A.

Answer:

The total distance is 3400 miles

Step-by-step explanation:

Given the following points:

​A(0,0)

B(400,300)

C(−800,800)

D(−800,0)

​

we can find the distance between each of them using the following equation:

d(X,Y)=

√(x2

−x1

)2

+(y2

−y1

)

2

in this case, we only need to find the distance from A to B and from B to C:

​d(A,B)=

√(400−0)2

+(300−0)2

=

√160000+90000

=

√250000

=500

d(B,C)=

√(−800−400)2

+(800−300)2

=

√1440000+250000

=

√1690000

=1300

​

next, notice that the distance from C to D and from D to A are on lines parallel to the x-axis and the y-axis, then, we can see that the distances are the follwing:

​d(C,D)=800

d(D,A)=800

​

then, the total distance traveled will be the perimeter of the polygon, Thus, adding the distances we have:

​P=d(A,B)+d(B,C)+d(C,D)+d(D,A)=500+1300+800+800

=3400

⇒P=3400miles

Answer:

x=105 and y=190

Step-by-step explanation:

4x+1y=610, and x+y=295 ; x= 105 and y=190

Answer:

x=105 and y=190

105 big bags of popcorn and 190 small bags of Popcorn

Step-by-step explanation:

4x+1y=610, and x+y=295 ; x= 105 and y=190

Answer:

30percent or 30%

Step-by-step explanation:

30% is 30/100

when simplified becomes 3/10 and 3tenths is also 30percent because it is 30percent of 100. Hope this helps

Answer:

he can use 10 meters of string

Step-by-step explanation:

Answer:

13 = y

Step-by-step explanation:

21 + 3 = y + 11

(21+3=24)

24 = y + 11

-11          -11

13 = y

Answer:

74

Step-by-step explanation:

first subtract the 78 to 82

then you will get 4 then subtract 78 by 4

and u get 74

Answer:

%90

Step-by-step explanation:

Since a percentage is out of 100 just multiply 50 times 2 and do the same to the top which would be 90

Answer: 11/20

Step-by-step explanation: it goes up 1/20th every time.

Answer:

hello

Step-by-step explanation:

i think

[tex] \frac{11}{20} [/tex]

hope it helps

have a nice day

bye