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2 years ago

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each of three students wrote an equation. • nikole wrote 5 2 = 21 8 4 • erik wrote 5.14 = 21 4 • keisha wrote 4 1 = 21 5 4 which

of these students wrote an equation that is true? staar 2013 a. nikole only. b. nikole and erik only. c. keisha only. d. nikole, erik, and keisha

1 answer:

ELEN [110]2 years ago

6 0

The answer is B. Keisha only

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Step-by-step explanation:

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Answer:

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3 years ago

Twelve more than half of a number is equal to the number

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Let's consider that number to be 'x'..
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2x=12+x/2
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2 years ago

John is building a fence around his home currently his fence measures 14 feet on each side but he wants to increase only the wid

nalin [4]

Answer:

The dimensions of rectangular fence are 14 feet and 20 feet.

Step-by-step explanation:

We are given the following in the question:

Length of rectangular fence = 14 feet

Width of fence = (14+x) feet

Area of rectangular field = 280 square feet

Area of rectangular field =

$A= \text{Length}\times \text{Width}$

Putting the values, we get,

$280 = 14(14+x)\\\\14 + x = \dfrac{280}{14}\\\\14 + x = 20\\x =20-14\\x = 6$

Thus, the dimensions of rectangular fence are 14 feet and 20 feet.

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2 years ago

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ira [324]

let's say

A(-3,1) B(-3,5) C(4,1)

we need to find the perimeter of ABC for that we find each of the sides

AB BC and AC

there is a formula to find the distance between 2 poins

let's say that a point has the structure A(x1,y1) where x=-3 and y=1 and B(x2,y2) where x2=-3 and y2=5

AB= $\sqrt{(x2-x1)^2+(y2-y1)^2}$

AB= $\sqrt{(-3+3)^2+(5-1)^2}$

AB= $\sqrt{0^2+4^2}$

AB=4

we do the same thing for AC and BC

AC= $\sqrt{(4+3)^2+(1-1)^2}$

AC= $\sqrt{7^2+0^2}$

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BC= $\sqrt{7^2+(-4)^2}$

BC= $\sqrt{49+16}$

BC= $\sqrt{65}$

The perimeter is equal to the sum of the sides

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2 years ago