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Monica [59]
4 years ago
8

1. Solve: 4(x + 3) = 9x + 9 - 5x + 3

Mathematics
1 answer:
Xelga [282]4 years ago
8 0

Answer:

the answer is c

Step-by-step explanation:

i hope this helps

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If the point (x,y) is on the x-axis is it x=0 y=0​
monitta

Answer:

You know that y must have to equal 0. x can be anything though.

Step-by-step explanation:

The x-axis is a straight line in the center of the y-axis where y = 0.

3 0
3 years ago
Determine the type and number of solutions of 7x^2+3x+8=0
scoray [572]
7x^2+3x+8=0 \\ \\a =7, \ b=3 ,\ c=8 \\ \\\Delta =b^2 - 4ac = 3^2 -4\cdot 7\cdot 8=9-224=-215\\ \\ Answer : \ \Delta \ is \ negative,\ this \ gives \ two \ imaginary \ solutions


5 0
3 years ago
Read 2 more answers
Samantha took an exam in her statistics class and received 90 out of 100. Samantha thought that was a good score, but she wanted
klasskru [66]

Answer:

Samantha's grade was 1.29 standard deviations above the class mean, that is, she scored better than 0.9015 = 90.15% of the class.

Step-by-step explanation:

Z-score:

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

In this question:

She scored better a proportion of the class given by the p-value of z = 1.29

z = 1.29 has a p-value of 0.9015.

Samantha's grade was 1.29 standard deviations above the class mean, that is, she scored better than 0.9015 = 90.15% of the class.

6 0
3 years ago
8x+4y=-20 and -4x-8y=-20 solve each system by substitution
True [87]
8x + 4y = -20
4y = -20 - 8x
y = -5 -2x

-4x - 8y = -20
-4x - 8(-5-2x) = -20
-4x + 40 + 16x = -20
12x = -60
x = -5

8(-5) + 4y = -20
-40 + 4y = -20
4y = 20
y = 5
4 0
4 years ago
The instructions for building a kite tell you to begin by cutting a strip of wood to 45 cm in length, but your ruler only measur
nata0808 [166]
I got 17.72 for this one.
7 0
3 years ago
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