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2 years ago

Writs a doubles plus one fact for the sum of 7

Mathematics

1 answer:

lbvjy [14]2 years ago

3 0

I think that 3 (3•2+1=7)

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If Peppa pig had 4 apples and Jorge took 2 how many apples does Peppa pig have HELP

Tanzania [10]

Answer:

Step-by-step explanation:

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2 years ago

Read 2 more answers

Find how many two digit numbers are divisible by 3

Bad White [126]

I'll use arithmetic series to find it.

First two-digit number divisible by 3 is 12, last such number is 99. Every 3rd number is divisible by 3.

So,

$a_1=12\\a_n=99\\d=3\\n=?\\\\a_n=a_1+(n-1)\cdot d\\99=12+(n-1)\cdot 3\\3n-3=87\\3n=90\\n=30$

There are 30 such numbers.

7 0

3 years ago

A researcher is interested in estimating the mean weight of a semi tracker truck to determine the potential load capacity. She t

FinnZ [79.3K]

Answer:

(19229.11 ,20770.89)

Step-by-step explanation:

We are given the following information:

Sample size, n = 17

Sample mean = 20,000 pounds

Sample standard deviation = 1,500 pounds

Confidence level = 95%

Significance level = 5% = 0.05

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 16 and}~\alpha_{0.05} = \pm 2.119$

$20000 \pm 2.119(\displaystyle\frac{1500}{\sqrt{17}} ) = 20000 \pm 770.89 = (19229.11 ,20770.89)$

4 0

3 years ago

Which answer choice is this? A 33 B 60 C 72 D 65

Artemon [7]

Answer:

x = 11

Step-by-step explanation:

• All interior angles in a triangle add up to 180.

• The square in the triangle represents 90°

90 + 45 + 1 + 4x = 180

136 + 4x = 180

4x = 180 - 136

4x = 44

x = 11

3 0

3 years ago

Help with this question pls

GrogVix [38]

Answer:

B .75

Step-by-step explanation:

hope this helped <3

4 0

2 years ago