3 years ago

How do you use a formula to calculate gradients

Mathematics

1 answer:

gizmo_the_mogwai [7]3 years ago

3 0

.Answer:

Step-by-step explanation:

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Alexei wants to hang a mirror in his boat and put a frame around it. The mirror and frame must have an area of 19.25 square feet

zhuklara [117]

Let

x---------> the thickness of the frame in feet

At-------> Area of the mirror and the frame in square feet

we know that

$At=19.25ft^{2}$ ------> equation $1$

$At=(3+2x)*(5+2x)\\ At=3*5+3*2x+5*2x+2x*2x\\ At=15+6x+10x+4x^{2} \\ At=4x^{2} +16x+15$ --------> equation $2$

equate equation $1$ and equation $2$

$19.25=4x^{2} +16x+15\\ 4x^{2} +16x+15-19.25=0\\ 4x^{2} +16x-4.25=0$

therefore

the answer is the option

$C. 4x2 + 16x - 4.25 = 0$

5 0

2 years ago

Read 2 more answers

Eva incorrectly classifies the quotient -(-81/-9) as positive.

NISA [10]

The answer is negative because, ( -81/-9) =(+9). -(+9) = -9. Maybe for got the - sign before the equation

6 0

2 years ago

The triangles are similar. If KL = 5, JL = 6, and PM = 9, find PN. Round to the nearest tenth.

Pachacha [2.7K]

If the triangles are similar, then the corresponding ratio of their sides have equal ratios. Through ratio and proportion, we would determine the answer.

5/6 = x/9, where x is the length for side PN

Transposing the equation so that x is on the left side:

x = (5/6)*9
x = 7.5

6 0

2 years ago

Given R (7,-1), A (3,-6), B(-3,-6), E (-5,4), plot the points and trace the figure.

RUDIKE [14]

Answer:

See below

Step-by-step explanation:

Given R (7,-1), A (3,-6), B(-3,-6), E (-5,4)

Points plotted and they form a quadrilateral

See attached