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ioda
2 years ago
13

Need help with this question

Mathematics
2 answers:
larisa [96]2 years ago
7 0

Answer:I believe that it is the first one

Sveta_85 [38]2 years ago
3 0

Answer:

Compatible numbers

Step-by-step explanation:

Compatible numbers are pairs of numbers that are easy to add, subtract, multiply, or divide mentally. When using estimation to approximate a calculation, replace actual numbers with compatible numbers. ... An estimate of 513 + 299 is found by mentally calculating 500 + 300 = 800.

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An engineer is standing 250 meters away from a building. She measures the angle of elevation to the top of the building to be 30
RSB [31]

Answer:

144m

Step-by-step explanation:

we would used tan 30 to determine the height of the building

tan 30 = opposite / adjacent

0.5774 x 250 = 144m

3 0
3 years ago
Please answer quickly!!!
Ivenika [448]

Answer:

3.5 min

Step-by-step explanation:

5 0
2 years ago
4(n-1)+2 = -23 +7n
liubo4ka [24]

Answer:

<h2><em><u>n</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>7</u></em></h2>

Step-by-step explanation:

4(n-1)+2 = -23 +7n

=> 4n - 4 + 2 = - 23 + 7n

=> 23 - 4 + 2 = 7n - 4n

=> 21 = 3n

=  > n =  \frac{21}{3}

=> <em><u>n</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>7</u></em><em><u> </u></em><em><u>(</u></em><em><u>Ans</u></em><em><u>)</u></em>

6 0
3 years ago
Laura is bowling 5 games. Her first 4 scores were 118, 128, 124, and 98. To end up with an average score of at least 123.2, what
BartSMP [9]

Answer:

148

Step-by-step explanation:

Average = sum of numbers /total numbers

let x = 5th number

123.2 = (118+ 128 + 124,+ 98 + x) / 5

123.2 = (468 + x) / 5

Multiply both sides by 5

616 = 468 + x

x = 148

8 0
3 years ago
A class consists of 63 women and 86 men. If a student is randomly selected, what is the probability that the student is a woman?
solmaris [256]
First, we need to get the total number students by adding the number of men and women. 63 + 86 = 149. This is the total number of samples. To get the probability that a randomly selected is a woman, we can write the ratio as 63:149 or the probability is 63/149.
6 0
3 years ago
Read 2 more answers
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