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hoa [83]
3 years ago
5

J'ai un exercice de maths pour demain merci de commenter au plus vite

Mathematics
1 answer:
kari74 [83]3 years ago
8 0
Oui je peux the aider
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I really need help on this can someone help me please!!!!
Nikitich [7]
It is rational and equal to 0. square root of 28 simplifies to 2 root 7, because you can take out the 4 and leave the 7 under the radical. because sq rt of 28 is 2 root 7, it's the same as the first term so it equals 0
6 0
3 years ago
Anthony is 154 cm tall, his brother Gerry is 5/7 as tall as him. How tall is Gerry?
11111nata11111 [884]

The correct answer is 110 cm

Explanation:

Fractions always include two values (one at the top and the other at the bottom) and they represent the proportion of something, for example, 1/2 of an apple means there is only half apple. Now, to calculate how much is 5/7 of 154 centimeters, simply divide the total number into the denominator (bottom number) and then multiply the result by the numerator (top number). This process is shown in detail below:

\frac{5}{7}  -  5 is the numerator and 7 is the denominator

5/7 of 154 cm

154 cm / 7 = 22

22 x 5 = 110 cm

4 0
3 years ago
Given that sin 2x = cos(2x - 30). Find the value of tan x.​
Paul [167]

Answer:

x=30o+n90on∈Z

Step-by-step explanation:

cos2x=sin(90o−2x)=sin(2x−30o)

Which mean 90o−2x=2x−30o+n360o

or 90o−2x+2x−30o=(2n+1)180o

The later cannot be true.

so x=30o+n90on∈Z

4 0
3 years ago
Read 2 more answers
What fraction of an hour is 42 minutes? Give your answer in its simplest form
lorasvet [3.4K]

\frac{60}{42}  =  \frac{10}{7}
7 0
3 years ago
For every 4 minutes he runs, he walks for 5 minutes. Yesterday he walked for 35 minutes. How many minutes did he run?
Dominik [7]
35/5=7*4=28
he ran for 28 minutes
5 0
3 years ago
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