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stellarik [79]
3 years ago
13

I need help with these questions

Mathematics
2 answers:
bazaltina [42]3 years ago
8 0

Answer:

1) 18.3m-16.5m=2.8m

2) 1.43m-135cm=0.81m

3) 0.16m+1.55m+0.13m=0,84m or 84cm

4)-

5)-

Step-by-step explanation:

2)cause 135cm is 1.35m

Scrat [10]3 years ago
5 0

<u><em>Answer:</em></u>

(2nd question, asking about height)  

8cm or 0.08m

<u><em>Step-by-step explanation:</em></u>

1.43m - 143cm

(1m = 100cm)

143cm - 135cm = 8cm

<u><em>Answer:</em></u>

445mm & 44.5cm

<u><em>Step-by-step explanation: </em></u>

155mm - 15.5cm

(1mm = 0.1cm)

15.5 + 16 + 13 = 44.5cm

44.5cm - 445mm

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Nhich pairs of triangles appear to be congruent? Check all that apply.
Fiesta28 [93]

Answer:

Answer is B and C Triangles 1, 3 and 4 appear to be congruent

8 0
2 years ago
A set of middle school student heights are normally distributed with a mean of 150 centimeters and a standard deviation of 20 ce
julsineya [31]

Answer:

The proportion of students whose height are lower than Darnell's height is 71.57%

Step-by-step explanation:

The complete question is:

A set of middle school student heights are normally distributed with a mean of 150 centimeters and a standard deviation of 20 centimeters. Darnel is a middle school student with a height of 161.4cm.

What proportion of proportion of students height are lower than Darnell's height.

Answer:

We first calculate the z-score corresponding to Darnell's height using:

Z=\frac{X-\mu}{\sigma}

We substitute x=161.4 , \mu=150, and \sigma=20 to get:

Z=\frac{161.4-150}{20} \\Z=0.57

From the normal distribution table, we read 0.5 under 7.

The corresponding area is 0.7157

Therefore the proportion of students whose height are lower than Darnell's height is 71.57%

8 0
2 years ago
A cell phone retailer used a mark-up rate of 60% on a cellphone case that originally cost $5. To find the new price of the case
sweet-ann [11.9K]

Answer:

$8

Step-by-step explanation:

5 increase 60% =

5 × (1 + 60%) = 5 × (1 + 0.6) = 8

7 0
3 years ago
What is the domain of the function y=2 x-5?<br> O x&gt;-5<br> O x&gt;2<br> O x&gt;5<br> O x&gt;10
antiseptic1488 [7]
That’s a good one Because what is the domain of the function Y equals 2X
3 0
3 years ago
HELP! please! ASAP! pleasee
murzikaleks [220]

Answer:

11.9

Step-by-step explanation:

I just know this off the top of my head

The real one is 11.18034

3 0
2 years ago
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