MATHEMATICS MIDDLE SCHOOL

Show your work x2 – 2x – 35 = 0

Answers

Answer 1

Answer:

Answer:

x=7 x=-5

Step-by-step explanation:

x^2 – 2x – 35 = 0

Factor

What 2 numbers multiply to -35 and add to -2

-7*5 = -35

-7+5 = -2

(x-7) (x+5) =0

Using the zero product property

x-7 =0 x+5=0

x-7+7=0+7 x+5-5=0-5

x=7 x=-5

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A cup of broth can have 870 milligrams of salt, which is 30% of the recommended daily allowance. What is the recommended daily amount?

Answers

If 870mg is 30% of recommended daily amount, then we can set up the equation:
870 = 0.30 * x (where x is the recommended amount)
870 / 0.3 = x
x = 2900mg

Therefore the recommended daily amount is 2900mg of salt

Answer:

2900 milligrams

Step-by-step explanation:

I had to do it and I got it right.

$4.30 makeup; 40% discount; 6% tax

Answers

Is it $2.88? i think so

50 BIG POINTS! Please help me on 5 questions!

Answers

1)
Solve using elimination
Multiply the first equation by 2 and the second by 5 so you can figure out x
10x-6y=-18
10x-25y=20
Subtract the two equations
19y=-28
y=-2
Plug y into the equation and you get x=-3
(-3, -2)
2. C Just model the equation
3. B Again, it's all about turning the word problem into equations
4. D. Use substitution and plug the x into the first equation.
5.
Multiply the whole first equation by 2.
You can see that because 4*2=8
8x+10y=16
Hope this helps.

coinciedent equations are the same equations but indifferent forms
example
2x+3y=2 is coincident with 4x+6=4 (multilied by 2)

so we have
4x+5y=8
next one was have
8x
we see that 4 times 2=8 so we just double the numbers
5 times 2=10
8 times 2=16
answer is 8x+10y=16
missing numbers are 10 and 16

subsitution meathod
absicalyy since you have x=y+2, then subsitue y+2 for x in the equaiton x+y=6 so
(y+2)+y=6
there fro the answer is D

d=desmond
g=george

d is 3 less than g
d=-3+g
d=g-3
combinded scores equals 187
d+g=187

the equations are
d=g-3 and d+g=187
the answer is B

child tikcet is 2 dollars so number of children times cost per child=cost
c times 2=cost=2c

adult tickets are same but differenc cost
6 times a=6a

so number of adults+number of kids=total number of people
c+a=38

cost of adults+cost of kids=total cost
2c+6a=148

the equations are
c+a=38 and 2c+6a=148
the answer is A

the solution is in the form (x,y)
so solv for x and y
5x-3y=-9
2x-5y=4
multily the first equation by -2 and the second equaiton by 5

-10x+6y=18
10x-25y=20
add them together

-10x+6y=18
10x-25y=20 +
0x-19y=38
-19y=38
divide both sides by -19
y=-2
subsitute
5x-3y=-9
5x-3(-2)=-9
5x+6=-9
subtract 6 from both sides
5x=-15
dvide by 5
x=-3

x=-3
y=-2
solution is
(-3,-2)

ANSWERS
missing numbers are 10 and 16
D
B
A
(-3,-2)

TOVOU, V V VI VIOLIIV VYVIScore: 0.67 of 1 pt
% 6.4.20
LMNP is a rectangle. Find the value of x and the length of each diagonal.
LN = 5x + 19 and MP = 8x - 8
x=0

Answers

Question:

LMNP is a rectangle. Find the value of x and the length of each diagonal.

LN = 3x + 1 and MP = 8x – 4

Answer:

Value of x = 9, Length of LN = 64, Length of MP = 64

Solution:

Given LMNP is a rectangle. LN and MP are diagonals.

LN = 5x + 19 and MP = 8x – 8

Diagonals of a rectangle are equal in length.

⇒ LN = MP

⇒ 5x + 19 = 8x – 8

Combine like terms together.

⇒ 19 + 8 = 8x – 5x

⇒ 27 = 3x

Divide by 3 on both sides of the expression, we get

⇒ x = 9

The value of x is 9.

To find the length of the diagonals.

LN = 5(9) + 19

= 45 + 19

LN = 64

MP = 8(9) – 8

= 72 – 8

MP = 64

Length of LN = 64 and the length of MP = 64.

What is the perimeter of ^PQR with vertices P(-2,9) Q(7,-3) and R(-2,-3) in the coordinate plane?

Answers

The perimeter of the given triangle in the coordinate plane is 36 units.

Given:

The triangle PQR with vertices P(-2,9) Q(7,-3) and R(-2,-3) in the coordinate plane.

To find:

The perimeter of the triangle.

Solution:

The distance formula to find the distance between two points ( $x_1,y_1$ ) and

( $x_2,y_2$ ):

$d=\sqr{(x_2-x_1)^2+(y_2-y_1)^2}$

The distance between point P(-2,9) and Q(7,-3)

$PQ=√((7-(-2))^2+((-3)-9)^2)\n\nPQ=√((9)^2+(-12)^2)\n\nPQ=15 units$

The distance between point Q(7,-3) and R(-2,-3)

$QR=√(((-2)-7)^2+((-3)-(-3))^2)\n\nQR=√((-9)^2+(0)^2)\n\nQR=9units$

The distance between point R(-2,-3) and P(-2,9)

$RP =√(((-2)-(-2))^2+(9-(-3))^2)\n\nRP =√((0)^2+(12)^2)\n\nRP =12units$

The perimeter of the triangle will be given by"

$P= PQ+QR+RP\n\n=15 units+9 units+12 units = 36 units$

The perimeter of the given triangle in the coordinate plane is 36 units.

Learn more about the distance formula here:

brainly.com/question/12674171?referrer=searchResults

brainly.com/question/12662141?referrer=searchResults

Using the distance formula we can determine the perimeter of PQR.

Distance formula: d=√(x-x1)^2+(y-y1)^2
distance of PR: √(-2+2)^2+(9+3)^2= 12
distance of QR: √(7+2)^2+(-3+3)^2=9
distance of PQ: √(7+2)^2+(-3-9)^2= 15

Perimeter: 12+9+15=36

Write 1 mm of 2 m as a fraction

Answers

So, there are 10mm in a cm.

There are 100 cm in a metre. That means that there are 1,000mm in a metre.

This also means that there are 2,000mm in 2 metres.

Therefore 1mm of 2m is essentially:

1/2000 m

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Math help me))))))))please