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3 years ago

Determine the most precise name for the quadrilateral with vertices at A(–7, –2), B(0, 2), C(4, –5), and D(–3, –9).

Mathematics

1 answer:

Ghella [55]3 years ago

3 0

All angles are 90 degrees, which cancels out a kite and a rhombus, leaving you with two options (rectangle or square). Using Pythagoras' theorem, you can work out that all sides are also of equal length, which means this shape is a square :)

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Mrs. Chuku was born 5 years after

dedylja [7]

Answer:

55 years old

Step-by-step explanation:

1. Born 5 years after her husband

h -5 = c

twice as old as son

h-5 /2 = s

s = 25

h -5 /2 = 25

h-5 = 50

50+5 = 55

5 0

2 years ago

-2x+4y= 12 3x+7y= 18 last one greatly appreciated

LenaWriter [7]

Value of x is $\frac{-6}{13}\\$ and y is $\frac{36}{13}$

Solution set is ( $\frac{-6}{13}\\$ , $\frac{36}{13}$ )

Step-by-step explanation:

We need to solve the system of equations given.

$-2x+4y=12\\3x+7y= 18$

Solving

Let:

$-2x+4y=12\,\,eq(1)\\3x+7y=18\,\,eq(2)$

Multiply eq(1) by 3 and eq(2) by 2 and add both

$-6x+12y=36\\6x+14y=36\\-------\\26y=72\\y=\frac{72}{26}\\y=\frac{36}{13}$

Putting value of y in equation 1

$-2x+4y=12\\-2x+4(\frac{36}{13})=12\\-2x+\frac{144}{13}=12\\-2x=12-\frac{144}{13}\\-2x=\frac{12*13-144}{13}\\-2x=\frac{12}{13}\\x=\frac{-6}{13}\\$

So, value of x is $\frac{-6}{13}\\$ and y is $\frac{36}{13}$

Solution set is ( $\frac{-6}{13}\\$ , $\frac{36}{13}$ )

Keywords: System of equations

Learn more about system of equations at:

#learnwithBrainly

7 0

3 years ago

Given this graph, which equation below would give you this graph?

Shalnov [3]

Answer:

Sally has seven times as many dimes as nickels. Their value is $3.00. How many nickels does she have?

4 nickels

7 nickels

28 nickels

Step-by-step explanation:

7 0

3 years ago

The sum of two numbers is 1. three times the larger number plus two times the smaller number is 18. find the numbers

denis-greek [22]

Let x be the larger number and y be the smaller number;

x+y=1 <--- x=1-y

3x+2y=18

3(1-y)+2y=18
3-3y+2y=18
-y=18-3
-y=15
y=-15

x+y=1
x-15=1
x=1+15
x=16

Hope I helped :)

8 0

3 years ago

3. A 24.000-gallon pool is being filled at a rate of 40 gallons per minute. At this rate, how many

Nataliya [291]

Answer:

Step-by-step explanation:

total gallon be filled in one minute =40 gallon

to fill half full you have to fill gallon =24000/2

=12000 gallon

Total time taken to fill 12000 gallon = 12000/40

=300 minutes.

or 5 hours

3 0

3 years ago

Read 2 more answers