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Ilya [14]
3 years ago
13

6. Seven-tenth of a number is 28. What is the number? *

Mathematics
2 answers:
dem82 [27]3 years ago
5 0

Answer:

40

Step-by-step explanation:

7/10x = 28

28/0.7 = x

40 = x

My name is Ann [436]3 years ago
3 0

Answer:

40

Step-by-step explanation:

28 divided by 7= 4 (to get the number of 1/10)

4 x 10= 40

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72÷6374<br><img src="https://tex.z-dn.net/?f=72%20%5Cdiv%206374" id="TexFormula1" title="72 \div 6374" alt="72 \div 6374" align=
Ivan
72 divided by 6374 is equal to 0.0113

Hope it helps :)
6 0
3 years ago
Simplify the following expression:<br> 3X(4-1) + (6+21)
Ilya [14]

Answer:

9x+27

Step-by-step explanation:

3x(4−1)+6+21

=9x+6+21

Combine Like Terms

=9x+6+21

=(9x)+(6+21)

=9x+27

3 0
3 years ago
Read 2 more answers
If sin theta = -0.7660, which of the following represents an approximate value of tan theta, for 180 degrees &lt; theta &lt; 270
Elis [28]
We have that
sin ∅=-0.7660

the sin ∅ is negative
so 
∅ belong to the III or IV quadrant
but
180°< ∅ < 270°
hence
∅ belong to the III quadrant
sin ∅=-0.7660
sin² ∅+cos² ∅=1
cos² ∅=1-sin² ∅------> cos² ∅=1-(0.7660)²-----> 0.4132
cos ∅=√0.4132-----> cos ∅=0.6428
the value of cos ∅ is negative-------> III quadrant
cos ∅=-0.6428

tan ∅=sin ∅/ cos ∅----> tan ∅=-0.7660/-0.6428----> tan ∅=1.1917

the answer is
tan ∅ is 1.1917
4 0
3 years ago
I need help writing this as a decimal!
Vesna [10]
Write it as 0.35. Hope it helps.

6 0
3 years ago
Read 2 more answers
Do the following measurements form a triangle? True or false <br><br> 24°, 30° , 126°
Aleks04 [339]

Answer:

True

Step-by-step explanation:

The sum of measures of these three angles of any triangle is invariably equal to the straight angle, also expressed as 180 °.

24+30+126=180

6 0
3 years ago
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