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2 years ago

I need help on this its 7th grade math

Mathematics

1 answer:

icang [17]2 years ago

8 0

Answer:

Step-by-step explanation:

$5.28 for 3 corn (divide)

the rate per corn is 1.76 ($1.76 for each corn)

the x value is the amount of corn and the y value represents the price for the amount of corn. If you multiply each x value by 1.76 only one will equal the given y value

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Question 7 Which set of side lengths can be used to form a right triangle?

olga2289 [7]

Answer:

D.30,40,50

Step-by-step explanation:

A.4,5,6

B.2,3,4

C.10,20,30

D.30,40,50

The Pythagoras theorem : a² + b² = c²

where a = length

b = base

c = hypotenuse

4² + 5² = 25 is not equal to the square of 6 which is 36

2² + 3² = 10 . 10 is not equal to the square of 4 which is 16

10² + 20³ = 500. 500 is not equal to the square of 30 which is 900

30² + 40² = 2500. this is equal to the square of 50

6 0

2 years ago

Rewrite in simplest terms: 10 ( 7 g − 9 h ) − 4 h − 8 ( − h + 8 g )

Ksju [112]

Answer:

$6g -86h$

Step-by-step explanation:

$10( 7g-9h) -4h - 8(-h + 8g)$

1) First, distribute the 10 and the -8 to the terms in the parentheses next to them. Remember, don't distribute to the -4h since it is not in the parentheses.

$10( 7g - 9h) -4h - 8(-h + 8g)\\70g - 90h-4h+8h-64g\\$

2) Next, combine like terms. (Any terms that have the same variables must be added together by their coefficients.)

$70g - 90h-4h+8h-64g\\\\70g-64g-90h-4h+8h\\6g-86h$

There are no more like terms to combine, so $6g -86h$ is the answer.

5 0

3 years ago

A fisherman can

viva [34]

Answer:

4 [miles].

Step-by-step explanation:

1) the condition 'the entire trip took 5 hours' can be written as (where t_us - time spent upstream, t_ds - time spent downstream)

$t_{us}+t_{ds}=5;$

2) but the distance [D] upstream is equal the distance downstream, then the condition above can be written:

$\frac{D}{V_{us}} +\frac{D}{V_{ds}} =5; \ (V_{us}-rowing \ upstream,V_{ds}-rowing \ downstream);$

3) finally,

$D=\frac{5V_{us}*V_{ds}}{V_{us}+V_{ds}};$

D=5*4/5=4 [miles].

5 0

1 year ago

Which are steps in the process of completing the square used to solve the equation 3 – 4x = 5x2 – 14x? Check all that apply.

avanturin [10]

Add 4x over to 14x, 3=5x2- 18x then add 18x to the other side 3+ 18x= 5x2then divided each side by 5,( 3+18x/5=x2) then square root each side the answer to x would be the square root of 3+18x/5

6 0

2 years ago

Read 2 more answers

Three times a number minus five equals two times the number.what is the equation

kirill [66]

3x - 5 = 2x is the equation

5 0

3 years ago