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Ilia_Sergeevich [38]
2 years ago
15

What is the value of x in the equation 5x-7=28

Mathematics
1 answer:
fredd [130]2 years ago
6 0

5x -7 = 28

Add 7 to both sides:

5x = 35

Divide both sides by 5:

X = 7

The answer is x = 7

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Maya was asked whether the following equation is an identity (2x+3)(x+1) = 2(x+1)^2 + (x+1)
quester [9]
No their not the first one ends up as 2x^2 plus four x plus four the other one isn’t the same
6 0
3 years ago
A small bar of gold measures 20 mm by 300 mm by 2 mm. One cubic millimeter of gold weighs about 0.0005 ounces. Find the volume i
Keith_Richards [23]

Answer:

12000 mm^2

6 ounces

Step-by-step explanation:

20*300*2=12000

12000*0.0005=6

4 0
3 years ago
A pharmacist wishes to mix a solution that is 6% Minoxidil. She has on hand 100 ml of a 2% solution and wishes to add some 8% so
son4ous [18]

Answer:

200 ml

Step-by-step explanation:

It's proportions basically.

frst off, 2% of 100 ml is 2 ml, so the 100 ml solution has 2 ml of Minoxidil.

Eventually we want 6/100 to be the porportion.  so the total is going to be 100 (from the initial 100 ml) plus however much is needed x.  And we want the amount of Minoxidil to be 2 + 8 percent of x.  so this gets us the equation

6/100 = (2 + .08x)/(100+x)  Then we solve

(100 + x) 6/100 = 2 + .08x

(100 + x) 6 = 200 + 8x

600 + 6x = 200 + 8x

400 = 2x

x = 200

so they should add 200 ml

You can check too.  there is 100 + 200 ml of solution total and 2 + 16 ml of Minoxidil so that's 18/300 = 6/100

6 0
3 years ago
Justin has $7.50 more than Eva, and Emma has $12 less than Justin. Together, they have a total of $63.00. How much money does ea
uysha [10]

Answer:


Step-by-step explanation:   emma's amount be X .  justin has $7.50+x because he has $7.50 more than emma.Since emma has 7.50+x-$12.to get everyones amount add what they have together which is=$7.50+x+$7.50+x-12 which in total is $63.00.after the calculations you get x=30.now distribute the x equally. so justin has $7.50+30=37.50.we also distribute it with emma's which is 7.50+30-12=25.5.

justin=$37.50

Emma=$25.50

to be sure add 37.50+25.50=$63


5 0
3 years ago
Solve for x. Round your answer to the nearest hundredth.<br> 15.56x - 200 &lt; 758.92
jasenka [17]

Answer: x<61.63

Step-by-step explanation: Add 200 to both sides, giving you 15.56x<958.92 .

Than divide by 15.56 giving you x< x<61.627249

Round to the nearest hundredth giving you x<61.63

8 0
2 years ago
Read 2 more answers
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