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Dafna1 [17]
3 years ago
13

Which alternative is the reciprocal of -1/4?* A. - 4 B.-1/4 C. 1/4 D. 4

Mathematics
1 answer:
rjkz [21]3 years ago
5 0

Answer:

b is the correct answer ok

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You have to spend money to make money ! You purchase a mix of newspaper ads and online ads. Each newspaper ad cost $18.50 and ea
SpyIntel [72]

Answer:

You buy six newspaper ads & eighteen social media ads.

Step-by-step explanation:

First, we change ads into variables to be more easier to calculate :

Let newspaper = x

Let social media = y

Second, make this variables into an equation, given that you purchase a total of 24 ads :

x + y = 24 (first equation)

Next, given that x = $18.50 & y = $26.50 & spent a total of $588 so you can make another equation :

18.50x + 26.50y = 588 (second equation)

Now, solve this simultaneous equation using elimination or substitution (depends on you) :

substitution =>

x + y = 24 ----------(1)

18.50x + 26.50y = 588 ---------(2)

(1)=> y = 24 - x ------(3)

(3)=>(2) 18.5x + 26.5(24-x) = 588

18.5x + 636 - 26.5x = 588

-8x = -48

x = 6

sub x=6 into(3)

(3)=> y = 24 - 6

= 18

newspaper = x

= 6

social media = y

= 18

6 0
3 years ago
Solve for x In the triangle
Goryan [66]
\boxed {\boxed { \sin(\theta) = \dfrac{\text{opp}}{\text{hyp}} }}

\sin(38 \textdegree) =  \dfrac{x}{11}

x = 11 \times \sin(38 \textdegree)

x = 6.8 \text { units}
8 0
3 years ago
The difference between a number divided by 3 and 4 is 20
Rzqust [24]
Set the number to x.

\frac{x}{3}-\frac{x}{4}=20
\frac{4x}{12}-\frac{3x}{12}=20
\frac{x}{12}=20
x=240

Thus, the number is 240.
8 0
3 years ago
If z=15, what would the expression z2 – 2z + 15 be equal to?
svet-max [94.6K]

Answer:

15

Step-by-step explanation:

z2 - 2z + 15

(15)2 - 2(15) + 15

30 - 30 + 15

0 + 15

15

5 0
3 years ago
Read 2 more answers
Otis has saved $18,500 so far to buy a house. He can put this amount into account that earns 5.1% simple interest, or another wi
Troyanec [42]

Answer:

J Compound interest; $298.65

Step-by-step explanation:

Interest compounding pays interest on the interest. For the same annual rate, any amount of compounding will earn more interest.

For short time periods, the effect of compounding is not great. In general, it will be a fraction of the equivalent simple interest rate. Here, the effective multiplier for annual compounding is ...

  1.051^4 = 1.22024337

and the effective multiplier for simple interest is ...

  1 +0.051·4 = 1.204

Then the difference in interest rate multiplier for the 4-year period is ...

  1.22024337 -1.204 = 0.01614337

That fraction of the $18500 principal is $298.65.

Compound interest earns $298.65 more than simple interest in this scenario.

Hope this helps, have an amazing day!

8 0
3 years ago
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