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ladessa [460]
3 years ago
12

Daniel used the formula to find the area of the following special trapezoid. His work is shown. Identify his error and correct i

t to find the area of the special trapezoid. \(\text{Line}\ 1:\ A=\frac{1}{2}\left(6\right)\left(7+7\right)\) \(\text{Line}\ 2:\ A=\frac{1}{2}\left(6\right)\left(14\right)\) \(\text{Line}\ 3:\ A=\left(3\right)\left(7\right)\) \(\text{Line}\ 4:\ A=21\text{ cm}^2\)
Mathematics
2 answers:
Mamont248 [21]3 years ago
6 0

Answer:

Step-by-step explanation:

CSYJDKUFTIGY.,JVCMHFXNDZBFREGAHTSJRDYKTHMCXGNZDFHJYDKUTFLCG,JHFMXJZDSRUTSIDFOULVGCFK

disa [49]3 years ago
5 0

Answer:

I had the same issue.

Step-by-step explanation:

Here is the actual equation.

A=1/2(6)(7+7)

A=1/2(6)(14)

A=(3)(7)

A=21cm^2

He messed up on line 3 by multiplying 1/2 to both numbers. It should be A=(3)(14) and he would have gotten 42.

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Find the coordinates of the point of intersection of all parabolas that have equation y=x2+px +q with p+q=2020. The point of int
ioda

Answer:

(1,2021)

Step-by-step explanation:

P and q can vary subject to their sum being 2020.

Consider one parabola with p1 and q1 and another with p2 and q2.

y1=(x1)^2+(p1)(x1)+(q1)

y1=(x2)^2+(p2)(x2)+(q2)

At their intersection, the x and y coordinates are the same.

y1=y2=y

x1=x2=x

x^2+(p1)x+(q1)=x^2+(p2)x+(q2)

Solve for x

x(p1-p2)=q2-q1

x=(q2-q1)/(p1-p2)

Use the constraint that p+q=2020 to eliminate p1 and p2.

p1=2020-q1

p2=2020-q2

x=(q2-q1)/(2020-q1-2020+q2)

x=(q2-q1)/(q2-q1)

x=1

Substitute in the equation for y.

y=1^2+p(1)+q

y=2021

3 0
3 years ago
For the following exercises, use the function f represented in table 14 below
Naily [24]
F(3)=53 and for f(x)=1; x=2
5 0
3 years ago
Solve the system of equations below using elimination. -3x+5y=-14 x+6y=20
SIZIF [17.4K]

Answer:

(x,y)= (5/13 , 55/13)

Step-by-step explanation:

4 0
3 years ago
Plssss i need help plsss i really need hep now asap help me pls
lianna [129]

Answer:

a)12

b)w

c)175

yeet

4 0
3 years ago
Please answer correctly !!!!!!! Will mark brainliest answer !!!!!!!!!!!!
Lunna [17]

Answer:

Its A

Thats because if you draw it then you will find that the vertex is 8, -8

A,

(8, -8)

THANKS FOR GIVING BRAINLIEST

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3 years ago
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