3 years ago

10x-3×=-18 -7×-8y=11A.(-7,-10)B.(-4,5)C.(3,-4)D.(2,-1)

Mathematics

1 answer:

Ivahew [28]3 years ago

7 0

Answer:

Step-by-step explanation:

You might be interested in

What is the area of the trapezoid. 21m, 7m, 21m.

kolbaska11 [484]

Answer:

249m

Step-by-step explanation:

7 0

3 years ago

The sample consisted of 50 night students, with a sample mean GPA of 3.02 and a standard deviation of 0.08, and 25 day students,

bulgar [2K]

Answer: The test statistic is t= -0.90.

Step-by-step explanation:

Since we have given that

n₁ = 50

n₂ = 25

$\bar{x_1}=3.02\\\\\bar{x_2}=3.04\\\\\sigma_1=0.08\\\\\sigma_2=0.06$

So, s would be

$s=\sqrt{\dfrac{n_1\sigma_1^2+n_2\sigma_2^2}{n_1+n_2-2}}\\\\s=\sqrt{\dfrac{50\times 0.08^2+25\times 0.06^2}{50+25-2}}\\\\s=0.075$

So, the value of test statistic would be

$t=\dfrac{\bar{x_1}-\bar{x_2}}{s(\dfrac{1}{n_1}+\dfrac{1}{n_2})}\\t=\dfrac{3.02-3.04}{0.074(\dfrac{1}{50}+\dfrac{1}{25})}\\\\t=\dfrac{-0.04}{0.074(0.02+0.04)}\\\\t=\dfrac{-0.04}{0.044}\\\\t=-0.90$

Hence, the test statistic is t= -0.90.

7 0

3 years ago

PLEASE HELP ME!! I WILL GIVE U BRAINLIEST

Anvisha [2.4K]

Answer:

Step-by-step explanation:the anwser is the middle one

5 0

3 years ago

2(x + 4) + 2x + 3 = 3x + 16<br>what does x eqaul

Ad libitum [116K]

Answer:

x=5

Step-by-step explanation:

2(x+4)+2x+3=3x+16

One solution was found :

x = 5

7 0

3 years ago

Read 2 more answers

What is the range of the function for the given domain

AleksAgata [21]

Answer:

thethe answer is the 3rd one

8 0

3 years ago