2 years ago

2r + 8 - r = -7 Combine like terms

Mathematics

2 answers:

professor190 [17]2 years ago

4 0

Answer: -15

Step-by-step explanation: 2r+8-r=-7

1r +8 = -7

1/1 -15/1

leva [86]2 years ago

4 0

Answer: r = -15

Step-by-step explanation:

2r - r = -7 -8

r = -15

You might be interested in

Eliminate the double signs in the expression -18-(+1)+(+16)+(-2)

Savatey [412]

Answer:

-5

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Sin (3x+15) = Cos (7x-2)<br><br> Find value of x

11Alexandr11 [23.1K]

$\bf \textit{Cofunction Identities}
\\ \quad \\
\boxed{sin\left(\frac{\pi}{2}-{{ \theta}}\right)=cos({{ \theta}})}\qquad 
cos\left(\frac{\pi}{2}-{{ \theta}}\right)=sin({{ \theta}})
\\ \quad \\ \quad \\
tan\left(\frac{\pi}{2}-{{ \theta}}\right)=cot({{ \theta}})\qquad 
cot\left(\frac{\pi}{2}-{{ \theta}}\right)=tan({{ \theta}})
\\ \quad \\ \quad \\
sec\left(\frac{\pi}{2}-{{ \theta}}\right)=csc({{ \theta}})\qquad 
csc\left(\frac{\pi}{2}-{{ \theta}}\right)=sec({{ \theta}})\\\\
-------------------------------\\\\$

$\bf \begin{array}{lcllclll}
sin(&90^o-\theta)&=&cos(&\theta)\\
&\uparrow &&&\uparrow \\
&3x+15&&&7x-2\\
&\downarrow \\
&90-(7x-2)
\end{array}
\\\\\\
90-(7x-2)=3x+15\implies 90-7x+2=3x+15
\\\\\\
92-15=10x\implies 77=10x\implies \cfrac{77}{10}=x$

5 0

3 years ago

Tim is 5 years older than Melissa. The sum of their ages is 21. This system is represented by the equations: t = 5 + m t + m = 2

Triss [41]

Tim is 13 and Melissa is 8

6 0

4 years ago

Five hundred tickets were sold for a Saturday evening performance of a play. The tickets cost $ 7.50 for adults and $4.00 for ch

Volgvan

Answer: A+C=500

7.5A+4.75C=3351.25

C=500-A

7.5A+4.75(500-A)=3351.25

7.5A+2375-4.75A=3351.25

2.75A=976.25

A=355 adults ($2662.50)

C=500-A=145 children ($688.75)

Step-by-step explanation:

6 0

3 years ago

Find the median for 1117 1465 513 437 1038 954 650 893 456 1028

lozanna [386]

923.5
Hope this helps!
Vote me brainliest!

6 0

3 years ago