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2 years ago

Please help me...........asap

Mathematics

2 answers:

rodikova [14]2 years ago

5 0

Answer: 45

Step-by-step explanation: 20*200/100=40

Verizon [17]2 years ago

3 0

Answer:

4. $45$

Step-by-step explanation:

The chart has a sample of 200 people and 20 of them walk.

$20 \div 200 = 0.1\\0.1 * 100 = 10$

This means $10\%$ people walk within the sample of 200 people. To get the number of people that walk in total apply the percentage to the larger population:

$450 * 0.1 = 45$

This means that approximately 45 people out of 450 walk.

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What is the solution of the system of equations below?

lakkis [162]

Answer:

the answer is B (2,1)

Step-by-step explanation:

Given the simultaneous equation

$2x+3y=7 .....1\\x+y=3 ..........2\\$

Using substitution method

from equation 2 :

$x=3-y ....3$

Substitute equation 3 into 1:

$2(3-y)+3y=7$

Open the bracket

$2(3)-2y+3y=7\\6-2y+3y=7\\6+y=7\\y=7-6\\y=1$

Substitute y=1 into x=3-y

$x=3-1\\x=2$

Hence the solution to the equation is (2,1)

PLEASE MARK ME AS BRAINLIEST

7 0

3 years ago

15. Bradley has a goal to work 28 hours each week at the pizza shop. So far he has

Lina20 [59]

16

28-12=16

He needs 16 more hours of work to complete

7 0

3 years ago

This week Andres will practice with his band for 1 1\2 hours monday , 1 3\4 hours on tuesday , and 2 hours wednesday . Next week

alexdok [17]

Answer:

10.5 hours

Step-by-step explanation:

Given:

This week Andres will practice with his band for

$1\frac{1}{2} \ means\ \frac{3}{2} \ hours$ on Monday

$1\frac{3}{4} \ means\ \frac{7}{4} \ hours$ on Tuesday

2 hours Wednesday.

Next week Andres will practice with his band for the same number of hours on Monday, Tuesday, Wednesday.

Question asked:

What was the total number of hours Andres will practice with his band over these 6 days?

Solution:

As she practice for two weeks, three days of each week:

On two Monday, she will practice = $\frac{3}{2} + \frac{3}{2} =\frac{3+3}{2} =\frac{6}{2} =3\ hours$

On two Tuesday, she will practice = $\frac{7}{4} +\frac{7}{4}=\frac{7+7}{4} =\frac{14}{4} =\frac{7}{2} \ hours$

On two Wednesday, she will practice = $2+2=4 \ hours$

Total hours, she will practice over 6 days $=3+\frac{7}{2} +4$

$=7+\frac{7}{2} \\ \\ =\frac{2\times7+7}{2} \\ \\ =\frac{21}{2} \\ \\ =10.5\ hours$

Thus, Andres will practice 10.5 hours with his band over these 6 days.

5 0

3 years ago

Hailey and Kacie are selling candles to raise money. • Hailey is selling candles for $4 each and has already raised $160. • Kaci

marysya [2.9K]

Answer:

The number of candles each girl needs to sell so that the total amount raised is the same for both is

Hailey 70 candles

Kacie 40 candles

Step-by-step explanation:

Let

x------> the number of candles sold

y----> total amount raised

we know that

Hailey's equation

$y=4x+160$ -----> equation A

Please note that Hailey has already raised $160, so he has sold 40 candles.

Kacie's equation

$y=7x+70$ -----> equation B

Please note that Kacie has already raised $70, so he has sold 10 candles.

equate equation A and equation B solve for x

$4x+160=7x+70$

$7x-4x=160-70$

$3x=90$

$x=30\ candles$

The number of candles each girl needs to sell so that the total amount raised is the same for both is

Hailey

40+30=70 candles

Kacie

10+30=40 candles

8 0

3 years ago

Kayla tutors for $20 per hour she spends $50 on transportation how much does she earn is she tutors for x hours

natima [27]

The equation to solve this is 20x-50

7 0

4 years ago