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likoan [24]
3 years ago
12

HELP. I have tried and tried and I CAN NOT solve these equations!

Mathematics
1 answer:
umka21 [38]3 years ago
6 0
Here are the solutions. See the attachment. I've color-coded for clarity.

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Algebra 1 CR-8
antiseptic1488 [7]

\mathrm{Domain\:of\:}\:x^2+2x-15\::\quad \begin{bmatrix}\mathrm{Solution:}\:&\:-\infty \:

\mathrm{Range\:of\:}x^2+2x-15:\quad \begin{bmatrix}\mathrm{Solution:}\:&\:f\left(x\right)\ge \:-16\:\\ \:\mathrm{Interval\:Notation:}&\:[-16,\:\infty \:)\end{bmatrix}

\mathrm{Axis\:interception\:points\:of}\:x^2+2x-15:\quad \mathrm{X\:Intercepts}:\:\left(3,\:0\right),\:\left(-5,\:0\right),\:\mathrm{Y\:Intercepts}:\:\left(0,\:-15\right)

\mathrm{Vertex\:of}\:x^2+2x-15:\quad \mathrm{Minimum}\space\left(-1,\:-16\right)

4 0
2 years ago
In this exercise, we are conducting many hypothesis tests to test a claim. Assume that the null hypothesis is true. If 400 tests
Brums [2.3K]

Answer:

Since the null hypothesis is true, finding the significance is a type I error.

The probability of the year I error = level of significance = 0.05.

so, the number of tests that will be incorrectly found significant is computed as follow: 0.05 * 100 = 5

Therefore, 5 tests will be incorrectly found significant given that the null hypothesis is true.

3 0
3 years ago
Please answer these I will give you all my points!
makvit [3.9K]
  1. 300
  2. 59
  3. 4
  4. 78

ok so put it like that and it will be correct.............................................................................(long pause)........................................................................................................... (thinks) I think that the right answer.

5 0
3 years ago
If you have a decimal answer, round to the nearest tenth!<br> x/-4−3=0
lions [1.4K]
X = -12 !!

so first rewrite the fraction
multiply both sides
move the constant to the right
change the signs
then you have your solution
5 0
2 years ago
Original cost: $1.25;markup %:80%
Sholpan [36]
Hey!

Find 80% of the original cost:

1.25 * 80% = 1

1.25 + 1 = 2.25

ANSWER: $2.25.
8 0
3 years ago
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