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3 years ago

Find the y-intercept for the parabola defined by this equation: y= 4x2 – 7x-2

Mathematics

2 answers:

Marina CMI [18]3 years ago

3 0

Answer:

(0,-2); The y-intercept is y=-2.

Step-by-step explanation:

Recall that the y-intercept is simply (0, y). In other words, we simply need to plug zero into the equation to acquire the y.

Thus:

$y=4x^2-7x-2$

$y=4(0)^2-7(0)-2$

$y=-2$

ivann1987 [24]3 years ago

3 0

Answer:

Step-by-step explanation:

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2 years ago

✓<br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B19%20%2B%20%20%5Csqrt%7B30%20%2B%20%20%5Csqrt%7B32%20%2B%20x%20%20%7D%20%7D%

Setler79 [48]

We'll have to repeatedly square both sides of the equation, in order to get rid of the square roots. Squaring a first time yields

$19+\sqrt{30+\sqrt{32+x}}=25$

Move the 19 to the right hand side:

$\sqrt{30+\sqrt{32+x}}=6$

And square again:

$30+\sqrt{32+x}=36 \iff \sqrt{32+x}=6$

Square one last time:

$32+x=36 \iff x=36-32=4$

Let's check the solutions: all these squaring might have created external solutions:

$\sqrt{19+\sqrt{30+\sqrt{32+4}}}=\sqrt{19+\sqrt{30+6}}=\sqrt{19+6}=\sqrt{25}=5$

So, $x=4$ is a feasible solution.

8 0

2 years ago

will give brainliest. Which of the binomials below is a factor of this trinomial? 3x^2+16x+ 5 A- 3x-5 B. 3x-1 C. 3x+1 D. 3x+5

Helen [10]

Answer: 3x + 1

Step-by-step explanation:

A p e x

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2 years ago

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A triangle has a height of 11.6 centimeters and an area of 54.52 square centimeters. What is its length?

DanielleElmas [232]

Answer:

9.4

Step-by-step explanation:

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2 years ago

Felipe has 3/4 acre of land to use for a vegetable garden. He separates the land into vegetable plots that are each 1/12 acre. H

antiseptic1488 [7]

Answer:

1) The number of vegetable plot Filipe has = 9 vegetable plots

2) A number line with 1/12 divisions will give the number of 1/12 acre vegetable plots as the number of divisions between 0 and 3/4

Step-by-step explanation:

1) The total size of the land Filipe has = 3/4 acre

The size of the vegetable plots to which he separates the land = 1/12 acre

The number of vegetable plot Filipe has = (The total size of the land Filipe has)/(The size of the vegetable plots to which he separates the land )

∴ The number of vegetable plot Filipe has = (3/4)/(1/12) = 9

The number of vegetable plot Filipe has = 9 vegetable plots

2) The number line can be used to model the situation by having the number line that has divisions of 1/12 unit and counting the number of 1/12 divisions between the zero (0) mark and the three quarter (3/4) mark

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2 years ago