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Umnica [9.8K]
3 years ago
14

Can someone please answer these questions?

Mathematics
1 answer:
Arisa [49]3 years ago
7 0

Keep in mind that you can gather only like terms. Two terms can be summed/subtracted if they involve the same powers of the same variables.

So, going point by point:

  1. We can subtract the terms, because they both involve the variable b, and we have 3b-7b = (3-7)b = -4b
  2. We can sum the terms, because they all involve the variable a, and we have a+a-5a = (1+1-5)a = -3a
  3. We can't sum this terms: 3 is a pure number, while 3r involves the variable r.
  4. We can only sum the two terms: we have 7t-8t-8 = (7-8)t-8 = -t-8
  5. We can't sum this terms: -20 is a pure number, while -15p involves the variable p.
  6. We can sum the terms, because they all involve the variable g, and we have -g-g-g = (-1-1-1)g = -3g
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9y-5x=20 i dono how to do this x and y intercwpt thingy
bagirrra123 [75]
     9y - 5x = 20
or, (9y - 5x) / 20 = 1
or, 9/20 y - 1/4 x = 1
compare with x/a + y/b = 1
you'll get
x intercept (a) = -4
y intercept (b) = 20/9

8 0
3 years ago
Sorry i have another question what is the inequality of 8x−8≤−72.
vova2212 [387]

That answer is x≤−8


Inequality:

8x−8≤−72


Step number  1:  You have to Add 8 to both sides.

8x−8+8≤−72+8

8x≤−64



Step number 2: You have to Divide both sides by 8.

8x /8  ≤  −64 / 8


Ur Answer:

x≤−8


Hope this helps :)


7 0
3 years ago
Read 2 more answers
Find cosØ if sinØ=-12/13 and tanØ&gt;0.<br><br> A) -5/12<br> B) -5/13<br> C) 12/5<br> D) -13/12
mestny [16]

Answer:

-5/13

Step-by-step explanation:

sin theta = opp / hyp

sin theta = -12 /13

we can find the adj side by using the pythagorean theorem

adj^2 + opp ^2 = hyp^2

adj^2 +(-12)^2 = 13^2

adj^2 +144 =169

adj^2 = 169-144

adj^2 = 25

Taking the square root of each side

adj = ±5

We know that it has to be negative since it is in the third quad

adj = -5

cos theta = adj / hyp

cos theta = -5/13

8 0
3 years ago
Read 2 more answers
Solve the equation. 9+2 14x – 31 = 19<br> Please answer it step by step
siniylev [52]

Answer:

x =  \frac{41}{28}  = 1 \frac{13}{28}

Step-by-step explanation:

9 + 2(14x - 3) = 19

9 + 28x - 31 = 19

- 22 + 28x = 19

28x = 19 + 22

28x = 41

\boxed{\green{x =  \frac{41}{28}  = 1 \frac{13}{28}}}

4 0
3 years ago
Help plz................
Pani-rosa [81]
You have the formula. Put in the numbers and solve for r.

The interest earned in 4 years on 5000 is (6500 -5000) = 1500.
.. I = Prt
.. 1500 = 5000*r*4
.. 1500/20000 = r = .075 = 7.5% . . . . . . matches selection B
7 0
3 years ago
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