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2 years ago

Help Me Please its math >.<

1 answer:

8 0

I can only do number 1 sorry :(
4x+y=2x-y what you have to do is sort the numbers into x and y so it becomes 4x - 2x = -y -y. (Remember when it crosses the = it becomes minus!) Then solve it to get 2x = -2y = 3 so x is 0.66 and y is -0.66 I guess?
I am probably wrong because I am not good at algebra but good at other stuff

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How many grams of a 15 percent alcohol solution should be mixed with 40 grams of a 30 percent solution to obtain a

Akimi4 [234]

The number of grams is 20 grams

Let x represent how many grams of a 15 percent alcohol solution

15%x+30%.40/x+40

=25%

0.15x+0.4.30=0.25 (x+40)

0.15x+12=0.25x+10

0.15x-0.25x=10+12

-0.1x=-2

x=-2/-0.1

x=20

Inconclusion The number of grams is 20 grams

Learn more here:

brainly.com/question/24750329

4 0

2 years ago

Juan earns $18 per hour. He receives time and a half for overtime. Last week he worked 50 hours. What was Juan’s gross pay last

larisa [96]

Answer:

$900

Step-by-step explanation:

18 x 50 = 900

69.25 i belive for taxes

3 0

2 years ago

Write an equation for the sentence:<br> Three times the sum of x and y is identical to five times x.

Oxana [17]

Answer:

3(x+y) = 5x

Step-by-step explanation:

8 0

2 years ago

The electronics company makes two types of switches. Type a takes 4 minutes to make and requires $3 worth of materials.Type b ta

Shalnov [3]

Let

x ------> number of switch type A

y -----> number of switch type B

Remember that

1 hour=60 min

32 hours=32*60=1,920 minutes

4x+5y=1,920 -------> equation 1

3x+5y=1,740 ------> equation 2

Solve the system of equations

Solve by graphing

using a graphing tool

see the attached figure

Solution is

x=180

y=240

therefore

<h2>the number of switch type A was 180</h2><h2>the number of switch type B was 240</h2>

3 0

11 months ago

Simplify exponents 5^-4over5^3<br> A.5^7<br> B.5^-1<br> C1/5<br> 1/5^7

Dimas [21]

Answer:

D. 1/5^(-7)

Step-by-step explanation:

ACCORDING TO THE LAW OF INDICES:

$\frac{a {}^{n} }{a {}^{m} } = {a}^{n - m}$

So; 5^(-4)/5^3

=5^(-4)-3

=5^-7

OR,

1/5^7

5 0

2 years ago