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laila [671]
3 years ago
7

Yo can I have help????

Mathematics
1 answer:
lawyer [7]3 years ago
3 0

(-7, 0)

i promise its right

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Please help. Show work thank yuou so much
ruslelena [56]

1. 25 x 0.39 = $9.75

2. 5.56 + 5.81 = 11.37, 11.37/2 = 5.685

4 0
2 years ago
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Knowing that 2i is one answer to the equation x^4 - 2x^3 + 6x^2 - 8x + m = 0, find the 'm' and the other possible answers.
kakasveta [241]
Ok so remember
if a+bi is a root, then a-bi is also a root

since 2i is a root, -2i is also a root
use synthetic division and the fact that when we divide by 2i and -2i, we have to get all real coeficients and end witha zero at the end
I will show the division in the attachment

we find m=8


we then find th resulting equation that is x^2-2x+2=0
quadratic formula
x=\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}
x=1+i or 1-i







m=8 and the other roots are
x=-2i, 1+i, 1-i


4 0
3 years ago
Imagine that the intelligence test score (M=100, SD =15) is perfectly correlated with SAT score. Your Z score on SAT is +1.0, yo
Oksanka [162]

Answer:

115

Step-by-step explanation:

Given :

Mean of intelligence score = 100

Standard deviation of intelligence score = 15

Since both are perfectly correlated,

The Zscore ON SAT = +1.0

Using the standard normal interpretation, Xcore on SAT of +1.0 means 1 standard deviation to the right

This means :

Mean + 1 standard deviation

100 + 1*15

= 115

We could use the Zscore formula directly too:

Zscore = (x - mean) / standard deviation

Zscore = +1 ; x = score

Hence, we have

1 = (x - 100) / 15

1 * 15 = x - 100

15 = x- 100

x = 15 + 100

x = 115

4 0
2 years ago
7 pizzas ordered and ate 5 6/8. what's left?
Nookie1986 [14]
2 2/8 or 2 1/4 if thats what you are asking for
7 0
3 years ago
DOES BRAINLY HAVE SBAC ANSWERS
GalinKa [24]

Answer:

Yeah well i mean i think they do bc they have like other apps for brainly like brainly.in and all the other one i think those are like for like smart smart people

Step-by-step explanation:

5 0
2 years ago
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