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3 years ago

14

A red string of holiday lights blinks every once 3 seconds while a string of blue lights blink once every 4 seconds how many tim

e will bits sets of lights blink in 1 minute

1 answer:

ryzh [129]3 years ago

3 0

Answer:

35 times a minute

Step-by-step explanation:

the red string blinks (60/3=)20 times a minute.

The blue light blinks (60/4)=)15 times a minute.

In total, 20+15=35.

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Matt thinks of a number. when he multiplies it by 5 and adds 6 he gets the same as when he multiplies it by 6 and subtracts 5. w

Readme [11.4K]

The number is 10.
5*10=50
50+5=55
6*10=60
60-5=55

7 0

3 years ago

A rectangular heptagon is measuring 26 mm and is divided by 7 congruent triangles. Each triangle has a height of 27 mm. What is

alina1380 [7]

Answer:

2,457 mm^2

Step-by-step explanation:

The dimensions of each of the triangles in terms of their bases and heights will be;

26 mm by 27 mm

Mathematically, the area of one of the triangles will be ;

1/2 * base * height

= 1/2 * 26 * 27 = 351 mm^2

So the area of the heptagon is the sum of the areas of all of the triangles

mathematically, that would be;

351 * 7 = 2,457 mm^2

8 0

3 years ago

Solve the equation by graphing. If exact roots cannot be found, state the consecutive integers between which the roots are locat

GaryK [48]

Answer:

Step-by-step explanation:

x = -4 and x=1

The solutions to the equation x^2 +3x -4 = 0 will be given by the points at which the graph intercepts the x-axis.

By looking at the graph, we can clearly see that the graph intercepts the x-axis at x=-4 and x=1.

One of the roots is located between -4 and -3, and the other one between 0 and 1.

7 0

3 years ago

In an article in Marketing Science, Silk and Berndt investigate the output of advertising agencies. They describe ad agency outp

fredd [130]

Answer: (7.27%, 7.55%)

Step-by-step explanation:

As per given , we have

Sample size : n= 392

Sample mean : $\overline{x}=7.41\%$

$\sigma=1.43\%$

Critical two-tailed z-value for 95% confidence = $z_{\alpha/2}=1.96$

Required confidence interval would be :

$7.41\%\pm (1.96)\dfrac{1.43\%}{\sqrt{392}}\\\\=7.41\%\pm 0.14\%\\\\=(7.27\%, 7.55\%)$

Hence, the required 95% confidence interval for the mean percentage share of billing volume from network television for the population of all U.S. advertising agencies : (7.27%, 7.55%)

7 0

4 years ago

−3(y+5)=15 someone please help me with this question my assignment is already late

AnnyKZ [126]

Answer: -10

Step-by-step explanation:

Simplifying

-3(y + 5) = 15

Reorder the terms:

-3(5 + y) = 15

(5 * -3 + y * -3) = 15

(-15 + -3y) = 15

Solving

-15 + -3y = 15

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '15' to each side of the equation.

-15 + 15 + -3y = 15 + 15

Combine like terms: -15 + 15 = 0

0 + -3y = 15 + 15

-3y = 15 + 15

Combine like terms: 15 + 15 = 30

-3y = 30

Divide each side by '-3'.

y = -10

Simplifying

3 0

3 years ago