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Irina18 [472]
3 years ago
8

If (a, –5) is a solution to the equation 3a = –2b – 7, what is a?

Mathematics
1 answer:
Llana [10]3 years ago
7 0

Answer:

d) 1⃣

Step-by-step explanation:

Multiply -5 by -2 to get , then deduct 7 to get 3. So, you now know that 3 = 3a; 1 = a.

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Kennedy wants to use an internet site to sell his gmae system. the website will charge him a fee that will be deducted from the
EleoNora [17]
We want to find 9.5% of $50.

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Then multiply 0.095 by 50. 50 * 0.095 = $4.75 fee

The money Kennedy will recieve is going to be 50 dollars minus the $4.75 fee.

50 - 4.75 = $45.25 with the fee subtracted

4 0
3 years ago
At one​ store, Julia saved ​$10 with a coupon for 40​% off her total purchase. At another​ store, the ​$29 she spent on books is
barxatty [35]
Let "a" and "b" represent the values of the first and second purchases, respectively.
  0.40*(original price of "a") = $10
  (original price of "a") = $10/0.40 = $25.00 . . . . divide by 0.40 and evaluate
  a = (original price of "a") - $10 . . . . . . Julia paid the price after the discount
  a = $25.00 -10.00 = $15.00

At the other store,
  $29 = 0.58b
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Then Julia's total spending is
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Julia spent $65 in all at the two stores.
6 0
3 years ago
Which of the following are identities? Check all that apply. A. cot2x + 1 = csc2x B. tan2x = 1 - sec2x C. sin2x = 1 + cos2x D. s
kirill115 [55]

I'll assume those are squares.  We know D is an identity:

\sin^2 x + \cos ^2 x = 1

Dividing through by \sin ^2 x

1 + \cot^2 x = \csc^2 x

That's A.

Dividing the original through by \cos ^2 x

\tan^2 x + 1 = \sec^2 x

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Identities: A & D
4 0
3 years ago
The combination for a lock is a 3-digit number. The digits are the prime factors of 42 listed from least to greatest. What is th
Dvinal [7]

Answer:

  2, 3, 7

Step-by-step explanation:

Since you know your multiplication tables, you know that ...

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and

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The numbers 2, 3, and 7 are prime numbers (not further divisible). This list is in order least to greatest, so is the combination of the lock.

3 0
3 years ago
I need help with number 2 and 3 I can't get this wrong and explain !!!!
mr_godi [17]
Because on number two there is a right angle and a part of it is 66 you subtract 66 from 90 and then divide that by 31 and subtract 7. Hope that helped a little 
7 0
3 years ago
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