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Paraphin [41]
2 years ago
13

There were 20 boys and 26 girls in a chess club last year. This year the number of boys increased by 30% but the number of girls

decreased by 15%. Was there an increase or
decrease in overall membership?
Mathematics
1 answer:
Readme [11.4K]2 years ago
5 0

Step-by-step explanation:

Boys

20 + (20 \div 100)30 = \\  = 20 + 0.2 \times 30  =   \\  = 20 + 6 = \\26

Girls

26 - (26 \div 100)15 = \\  = 26 - 0.26 \times 15 =  \\  = 26 - 3.9 = \\  = 22

Total last year 46

Total this year 48

Increase

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Jade's room is 24 feet by 12 feet. She makes a scale drawing of 8 inches by 4 inches. What scale did she use?
8_murik_8 [283]

Answer:

d- 1 inch=3 feet

Step-by-step explanation:

24 feet÷_=8 inches, so the blank is 3

and that fits for 12 feet too.

12 feet ÷_=4 inches, so the black is 3

So, D

Hope this helps!

And welcome to the brainly family

5 0
2 years ago
the hoover dam is 725 feet tall. how long would it take an object to fall from the top to the base of the dam? round the answer
Alinara [238K]

Answer:

45.05 seconds

Step-by-step explanation:

Use the formula: d = vi t + \frac{1}{2} at^{2}

d = distance      vi = initial velocity (m/s)    

t = time (s)     a = acceleration (m/s^{2})

m is meters and s is seconds. They are units of measurement so leave them be.

Assuming the object is simply dropped, the initial velocity is 0 since the object was not moving before it was dropped.

The distance is 725 feet, which is 220.98 meters.

The acceleration is 9.81m/s^{2} since that is the acceleration of Earth's gravity, aka free fall.

Time is what we are trying to find so just leave it as the variable t.

So plug the values into the equation:

220.98m = (0)(t) + \frac{1}{2} (9.81m/s^{2})(t)

220.98m = (4.905m/s^{2})(t)

45.0519877676s = t

t = 45.05s

Remember to pay attention to units because your answer will be wrong otherwise

7 0
2 years ago
Select the correct answer.<br> What is the solution to this equation <br><br> (1/4)x+1=32
olga_2 [115]

Answer:

YES

Step-by-step explanation:

6 0
2 years ago
Can someone help me please
Lady_Fox [76]
Let's solve your system by substitution.
y
=
−
2
x
+
7
;
y
=
5
x
−
7

Step: Solve
y
=
−
2
x
+
7
for y:
y
=
−
2
x
+
7

Step: Substitute
−
2
x
+
7
for
y
in
y
=
5
x
−
7
:
y
=
5
x
−
7
−
2
x
+
7
=
5
x
−
7
−
2
x
+
7
+
−
5
x
=
5
x
−
7
+
−
5
x
(Add -5x to both sides)
−
7
x
+
7
=
−
7
−
7
x
+
7
+
−
7
=
−
7
+
−
7
(Add -7 to both sides)
−
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x
=
−
14
−
7
x
−
7
=
−
14
−
7
(Divide both sides by -7)
x
=
2

Step: Substitute
2
for
x
in
y
=
−
2
x
+
7
:
y
=
−
2
x
+
7
y
=
(
−
2
)
(
2
)
+
7
y
=
3
(Simplify both sides of the equation)

Answer: x=2 and y=3
6 0
3 years ago
1. Ima Thief robs a bank and takes off in a getaway car. Five minutes Polly Srule takes off after Ima.
Amanda [17]

Answer:

A

Step-by-step explanation:

4 0
3 years ago
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