Plz help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

rosijanka [135]3 years ago

3 0

Lol, were are learning the same thing! Anyway, Your answer would be 292.5. It would be this answer because the dotted lines are actually pointing out what the height is and the area of a triangle equals 1/2bh(base x height divided by 2). So knowing this information, you would multiply 13 x 45 and get an answer of 585. Then you would divide it by 2. This leads you back to the original answer of 292.5. I hope I helped! :)

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The city school district is considering increasing class size in the elementary schools. However, some members of the school boa

Snezhnost [94]

Answer:

The null hypothesis would say that class size has no effect on students learning.

Step-by-step explanation:

Null hypothesis is a type of hypothesis that is used in statistics which proposes that there is no difference between a certain characteristic of a population or the data - generating process.

Now, in this question,the school district is considering increasing class size in the elementary schools but we want to check whether larger classes may have a negative effect on students learning.

Thus, the null hypothesis would reject this claim of larger classes having negative effect on students and say that class size has no effect on students learning.

6 0

3 years ago

Can u answer number 20 only pls with explaining

densk [106]

$\text{Hello there!}\\\\\text{To find your average, you would add all of the numbers together, then}\\\text{divide by how many there are}\\\\\text{The times are: 1.23, 1.04, and 1.18}\\\\\text{Add them together and divide by 3}\\\\1.23+1.04+1.18=3.45\\\\3.45\div3=1.15\\\\\boxed{\text{Average time: 1.15 minutes}}$