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Jlenok [28]
3 years ago
13

CAN SOME ONE HWELP ME WITH THIS HURRY PLEASE

Mathematics
1 answer:
oksian1 [2.3K]3 years ago
6 0
4. 15 + 4x = 6 + 5x
           -x = -9
            x = 9

5. Sally : x , Martha : y
x = 2 + y
x + y = 5.64
2 + y + y = 5.64
2y = 3.64
y = 1.82
Sally paid $1.82.

6. Bob : x , Tim  : y
x = y - 3
x + y =7.80
y - 3 + y = 7.80
2y = 10.80
y = 5.4
Bob spent $5.40.
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Answer:

There is statistical evidence at 95% level to claim that students attend more than 2 classes per quarter

Step-by-step explanation:

Given that one instructor believes that students take more than 2 classes per quarter on average. Let X be the no of classes students take.

H_0: \bar x =2\\H_a: \bar x >2

(Right tailed test at 5% significance level)

\bar x =2,3 \\s = 0.8

Mean difference = 2.3-2=0.3

Std error = \frac{0.8}{\sqrt{24} } \\=0.1633

Test statistic t = mean diff/std error = 1.84

p value =0.039

Since p <0.05, we reject null hypothesis.

There is statistical evidence at 95% level to claim that students attend more than 2 classes per quarter

3 0
4 years ago
If DA equals 6 units, AB equals 16 units, and HE equals 36 units, what does EF equal?​
yuradex [85]

Answer:

B. 96 units

Step-by-step explanation:

DA is 6 units and HE is 36 units. There are the same side, but HE is 6 times larger.

AB is 16 units, but since all the sides on the left shape are 6 times larger, EF has to be 16*6, which is 96 units.

Hope this helps

5 0
4 years ago
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zubka84 [21]

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5 0
3 years ago
A mountain climber begins to climb up from an altitude of 125 meters at a steady, constant rate of 25 meters per hour. Write an
Shalnov [3]

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3875

Step-by-step explanation:

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5 0
3 years ago
Brainliest if corerct
AysviL [449]

Step-by-step explanation:

2x + 2  = 3x - 52

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3 years ago
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