Mathematics College

x+y =783
10x+7y=6459​

Answers

Answer 1

9514 1404 393

Answer:

  (x, y) = (326, 457)

Step-by-step explanation:

Use the first equation to make an expression for y that can be substituted into the second.

  y = 783 -x

  10x +7(783 -x) = 6459

  3x = 978 . . . . . . . . . . . . subtract 7(783) = 5481

  x = 326 . . . . . . . . . . . . . divide by 3

  y = 783 -326 = 457

The solution is (x, y) = (326, 457).

X+y =78310x+7y=6459

Related Questions

Sound travels approximately 12.3 miles per minute. How many minutes will
it take someone to hear thunder if it strikes 85 miles away? Round your
answer to the nearest tenths.

Answers

Answer:

6.9 minutes

Step-by-step explanation:

Setup equality:

    [tex]\frac{12.3}{1} = \frac{85}{m}[/tex]

Cross multiply:

    12.3m = 85

Divide both sides of equality by 12.3:

    m = 6.9 minutes

It takes 6.9 minutes to take someone to hear thunder if it strikes 85 miles away.

What is Unitary method?

The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.

Given:

Sound travels approximately 12.3 miles per minute.

So, if the thunder strikes 85 miles away  it will take

=85/12.3

=6.91 minutes.

Hence, 6.91 minutes  to take someone to hear thunder if it strikes 85 miles away.

Learn more about unitary method here:

https://brainly.com/question/22056199

#SPJ2

can someone help me with this i have no idea how to do this:/ will mark brainliest

Answers

Answer:

slope = 2.

Step-by-step explanation:

find the slope using this formula y2-y1/x2-x1

40-20/1-0 = 2/1 or just 2.

help??
Anyone???
7th grade math

Answers

Answer:

25 X 5.5 equals 137.5 miles

Step-by-step explanation:

brainlies pleas

I need step by step help on how to work out this percentage question ​

Answers

Answer:

$15.7, $141.3

Step-by-step explanation:

Discount

157*0.1 = $15.7

Sale price

157 - 15.7 = $141.3




A trader bought 1000 oranges for $500. Eighty
of them were bad. She sold the remainder in
packets of four at $3.50 per packet. Calculate
i. the total amount she received for the
oranges sold
ii. the percentage profit on the amount she
paid for the oranges.

Answers

Answer:Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.

Quincy spends  of his pocket money on snacks to keep in his locker. Write the fraction  in decimal form.

The decimal equivalent of  is .

Step-by-step explanation:Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.

Quincy spends  of his pocket money on snacks to keep in his locker. Write the fraction  in decimal form.

The decimal equivalent of  is .

What is 1/10 of the digit in the ten thousand place of 683,906.826.24

Answers

If u mean 1/10 of the number 8 in the thousand place then 0.8. If u mean 1/10 of the value 8000 then 800

Write the equation of the line fully simplified slope intercept form

Answers

Answer:

y = 4x - 3

Step-by-step explanation:

Select the correct answer.
which equation represents the line that is parallel to y= 3 and passes through (-2,-8)?
А.
x = -2
B.
x=3
C. y=-8
D.y= 3x - 2

Answers

Answer: -8

Step-by-step explanation:

other people got -8 so I'm pretty sure this is the answer.

Find the percent of change
8 feet to 10 feet

Answers

Answer:

10 feet is [tex]\frac{10}{8}[/tex] or 1.25% of 8 feet.

Step-by-step explanation:  :D

what is tan 11pie divided by 6?

Answers

Answer:

1/6 tan(11 π) = 0

Alternate representations:

1/6 tan(11 π) = -1/6 cot((21 π)/2)

1/6 tan(11 π) = -1/6 cot((23 π)/2)

1/6 tan(11 π) = 1/(6 cot(11 π))

Step-by-step explanation:

Select the correct answer.
If u= 1 + i and v= 1 - i, what is u + V?

Answers

Answer:

u + v = 2

Step-by-step explanation:

If v = 1 - i

and u = 1 + i

Then we have to calculate and value of u + v

Now u + v = ( 1 - i ) + ( 1 + i )

               = (-i + i) + ( 1 + 1 )    [by adding like terms]

               =  0 + 2

               = 2

= u + v = 2

:D

What’s the unit rate for Tegan?

Answers

Answer:

The unit rate is 16

The unit rate is 16 I think

Find the LCD for the rational expressions. Enter your answer in factored form.

Answers

x^2 + 5x + 6 factors out to be (x + 2)(x + 3).

14x + 42 factors out to be 14(x + 3).

LCD = 14(x+2)(x+3)^2

Please solve these! Also if you could please show your work! This is Algebra 1

Answers

i attached screenshots for answers since I can't write freely here

there are 3 pics just scroll

Step-by-step explanation:

1) -28

here u can solve it normally , but in pic took long steps since it's "simplify expressions"

2) x = 64

3) D) -1 ½

A 2 1/2 pound of grass seed covers 1/8 of an acre. How much grass seed is needed for 1 acre

Answers

Answer:

20 pounds

Step-by-step explanation:

You just multiply 2 1/2 by 8 to figure out the whole acre

2.5x8=20

Answer:

20 pounds of grass seeds

Step-by-step explanation:

2.5: 1/8

?    : 1

multiply both sides by 8.

2.5*8=20

? = 20

Use the given conditions to find the exact value of the expression.

Answers

9514 1404 393

Answer:

  (7 -24√3)/50 = 0.14 -0.48√3

Step-by-step explanation:

Sine is negative and cosine is positive in the 4th quadrant, so ...

  sin(α) = -√(1 -cos(α)²) = -√(1 -576/625) = -7/25

Then the cosine of the angle sum is ...

  cos(α +5π/6) = cos(α)cos(5π/6) -sin(α)sin(5π/6)

  = (24/25)(-√3/2) -(-7/25)(1/2)

  = (7 -24√3)/50 = 0.14 -0.48√3

What is 1.3*10^4 in standard notation
A. 1.3^4
B. 13,000
C. 0.00013
D. 1300

Answers

Answer:

13000

Step-by-step explanation:

If you go 4 steps forward at first, it is 13. Add three zeros and then it is at 10^4 and 13000

One zero added is one power in scientific notation

Answer:

C. 13,000

Step-by-step explanation:

You do 10x10x10x10 and get 10,000 and then multiply that by 1.3 or move the decimal point do the right 4 times for the 4 zeros

Write an equation in function notation for the relation shown in the picture below.

Answers

Answer:

y = -x + 2

Step-by-step explanation:

Solve for xRequired to answer. Single choice.Immersive Reader
(5 Points)
6(+2)−20=6
6
(
x
+
2
)
−
20
=
6
x

No Solution

=−1
x
=
−
1


=0
x
=
0

all real numbers

Answers

Answer:

the answer is no solution.

Step-by-step explanation:

15 POINTS

A housepainter mixed 5 gal of blue paint with every 9 gal of yellow paint in order to make a green paint. Which ratio of gallons of blue paint to gallons of yellow paint will make the same shade of green paint?

A. 10 : 45

B. 30 : 54

C. 6 : 10

D. 27 : 15
explanation if you know how to explain

Answers

Answer:

The answer is B

Step-by-step explanation:

The problem is asking for the same ratio as 5:9

Multiply both sides by 6 to get 30:54

help i brian list
vvvv

Answers

I think it’s A Im not sure tho
The answer is C yep it is

Convert 1010101001 from binary to hexadecimal.

Answers

Answer:

2A9

Step-by-step explanation:

What are the roots of the equation x(x + 10) +20 = -5?
B5.5
C. 10,2​

Answers

Answer:

[tex]x=-5[/tex]

Step-by-step explanation:

STEP 1: Simplify each term.

[tex]x^2+10x+20=-5[/tex]

STEP 2: Move 5 to the left side of the equation by adding it to both sides.

[tex]x^2+10x+20+5=0[/tex]

STEP 3: Add 20 and 5.

[tex]x^2+10x+25=0[/tex]

STEP 4: Factor using the perfect square rule.

[tex](x+5)^2=0[/tex]

STEP 5: Set the x+5 equal to 0.

[tex]x+5=0[/tex]

STEP 6: Subtract 5 from both sides of the equation.

[tex]x=-5[/tex]

Which algebraic expression is equivalent to the expression below?

(8x + 12) + (9x - 3)
A.
20x - 6
B.
17x + 9
C.
29x - 3
D.
17x + 15

Answers

The answer is B, all you have to do is combine like terms 8x+9x and 12+ -3

Answer:

b

Step-by-step explanation:

RT = ___
RS = RU...Reason?
RT = ___ and Reason?
RST = RUT...Reason?

Answers

Answer:

okay i will answer but i dont see the question

Step-by-step explanation:

How do I add 12 ½ +16¾=

Answers

Answer:

decimal format = 29.25mixed number = 29 1/4Improper fraction = 117/4

Step-by-step explanation:

Make the denominators equal after simplifying the denominators*. The denominators are currently 2 and 4. So you can just make your life easier by making the denominator of the first number a 4. Multiply both sides by 2.

1. Simplify

12*2+1 = 25/2

25/2*2/2 = 50/4

2. Simplify second number

16*4+3 = 67/4

3. Add the improper fractions

50/4 + 67/4 = 117/4

Total answer:29.25 = decimal formatmixed number = 29 1/4Improper fraction = 117/4

Terms:

*denominators - the bottom number of a fraction

Hope this helped,

Kavitha Banarjee

What number should the fraction 15/3 be multiplied by in order to equal 1

soo ya marking brainlist 165 points

Answers

Answer:

Step-by-step explanation:

Just so you know, you are stuck with awarding just 5 points.

15/3 * 1/5 = 1

NUMBER 2!! Helppppp ASAP plssss

Answers

Answer:

i think 3 seconds, sorry i don't know much about acceleration

Step-by-step explanation:

Answer:

4.2 seconds

Step-by-step explanation:

which shows the mixed number for 9/4 in the simplest form

Answers

Answer:

2  1/4

Step-by-step explanation:

if joey trap has 2 million views and you go check him out how many views will he have no really go check him out 100 points just go look him up its not a joke

Answers

Answer:

lol done

Step-by-step explanation:

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