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Shalnov [3]
3 years ago
7

Three times the sum of a number and four is twenty-one. Find the number. The number is ___

Mathematics
2 answers:
Nady [450]3 years ago
6 0

Answer:

The answer to your question is: x = 3

Step-by-step explanation:

                                            3(x + 4) = 21

                                              x  + 4 = 21/3

                                             x + 4 = 7

                                            x = 7 - 4

                                            x = 3

cupoosta [38]3 years ago
5 0

Answer:

n = 9/3 = 3

Step-by-step explanation:

Translating these words into symbolic statements:

3(n + 4) = 21.

Perform the indicated multiplication, obtaining:

3n + 12 = 21

Combine the constant terms:  3n = 9

Finally, solve this for n: n = 9/3 = 3

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1. Two triangles have the following congruence statement: ACGI = AMPR Name all 6 pairs of corresponding congruent parts. 1.​
rodikova [14]

Answer:

\angle C \cong \angle M

\angle G \cong \angle P

\angle I \cong \angle R

\overline{CG} \cong \overline{MP}

\overline{GI} \cong \overline{PR}

\overline{CI} \cong \overline{MR}

Step-by-step explanation:

Given the congruence statement ∆CGI \cong ∆MPR, it follows that the corresponding sides of both ∆s are equal, as well as the corresponding vertices or angles. It implies that ∆CGI and ∆MPR are of the same shape and size.

✅Thus, the 6 pairs of the corresponding congruent parts of ∆CGI and ∆MPR are:

\angle C \cong \angle M

\angle G \cong \angle P

\angle I \cong \angle R

\overline{CG} \cong \overline{MP}

\overline{GI} \cong \overline{PR}

\overline{CI} \cong \overline{MR}

3 0
3 years ago
What's the exact value for this trigonometric function sin 60 degrees
Elodia [21]
\sin60^\circ=\dfrac{\sqrt{3}}{2}
3 0
3 years ago
if we increased one side of a square by 5 units and decreased the other by 3 units the area of the resulting rectangle would be
zvonat [6]

Answer:

18 units

Step-by-step explanation:

So let's list out the sides.

for the first square let's just call them x

for the second square then they would be x+5 and x-3

So let's write out their areas we will cal the area of the first one z

x*x = z

(x+5)*(x-3) = z+21

since z = x^2 we can set up the second equation as a quadratic.

(x+5)*(x-3) = x^2 + 21

x^2 - 3x + 5x - 15 = x^2 + 21

But look, the x^2s cancel out

2x - 15 = 21

2x = 36

x = 18

Test it out and see if it fits the description, And if you don't understand anything just let me know so I can explain more.  

3 0
3 years ago
Beverley has quarters and dimes in her pocket. She has 21 coins with a total value of $3.00. How many of each type of coin does
forsale [732]

Answer:

6 quarters and 15 dimes

Step-by-step explanation:

6 quarters = $1.50

15 dimes = $1.50

6 quarters + 15 dimes = $3.00

8 0
2 years ago
Simplify! Thank you so much if you help! This is urgent!!
Crank
The simplified form is 12x-40
4 0
3 years ago
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