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Crazy boy [7]
3 years ago
12

What is the value of the expression? 200 - 42 + 9 · 10

Mathematics
2 answers:
OleMash [197]3 years ago
7 0

Answer: 247

Step-by-step explanation:

Use PEMDAS order. (Parentheses, exponents, multiplication, division, addition, subtraction)

200 - 42 + 9 · 10

200-42+ 90

157+90

247

tekilochka [14]3 years ago
5 0

Answer:

248

Step-by-step explanation:

Given: 200 -42 + 9.10

First we have to multiply 9 and 10, we get

= 200  - 42 + 90

Now we have to the positive numbers 200 and 90

= 290 - 42

Subtract 42 from 200, we get

= 248

Answer : 248

Hope you will understand the concept.

Thank you.

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Find (hog)(-2)<br> h(x) = 3x<br> g(x) = 4x + 1
LenKa [72]

Answer:

h(-2)=-6

g(2)=-7

Step-by-step explanation:

Just plug 2 in for x and solve the equation.

3 0
3 years ago
A glass contains alcohol and water in the ratio 1:4. A second glass contains the same quantity of liquid, but this time the rati
AnnyKZ [126]

Answer:

3:7

Step-by-step explanation:

So to solve this problem, you have to understand what the ratio 1:4 and 2:3 means. The 1:4 ratio in the first equation means that for "each unit of alcohol" there is 4 of those units of water. So let's say I had 2 gallons of alcohol and mixed it with 8 gallons of water. This means for each gallon of alcohol, there is 4 gallons of water, or in other words a 1:4 ratio. This can be described as a percentage as well. For each 5 gallons there are 4 gallons of water, and 1 gallon of alcohol or <em>20%</em> is alcohol. So let's just say that x=alcohol and y=water, this means that: x+y=c  where c is the total amount in the glass. This means that: x=0.20c

Let's do the same thing to the second equation. the ratio means that for every 2 units of alcohol there are 3 units of water. This means for every 5 gallons of the mixture there is 2 units of alcohol which is 40%. In this case let's also say that j=alcohol and k=water. This means that: j+k=c and that: j=0.40c.

So if we're going to add the two glasses, we simply add the two sides, and get: j+x+k+y=2c. Now remember how can can express j and x in terms of c, since it's a certain percentage of c (the entire thing). This means that we get: (0.4c+0.2c)+x+k=2c Now we can add like terms to get the equation: 0.6c+y+k=2c. We can find how much 0.6c is to 2c by dividing the 2, in doing so we get that 0.6c/2c = 0.3, or in other words the 0.6c is only 30% of the final mixture, and since the 0.6c represents the alcohol in this mixture, that means that's the percentage of alcohol. To write this as a ratio, this means for every 3 units of alcohol, there is 7 units of water, because 3/10 = 30%.

3 0
2 years ago
Read 2 more answers
I NEED HELP ASAP BEFORE IT TIMES OUT!
padilas [110]
Ahh ok so split it up into two rectangles:

Rectangle one:
A=lw
A=4(12)
A=48

Rectangle two:
A=lw
A=10(2)
A=20

Add both areas up to get 68 ft squared!! :)
7 0
2 years ago
Read 2 more answers
A=5/6(B+C) SOLVE FOR C
Shalnov [3]

A = 5/6(B + C)

multiply 6 on both sides

6A = 5(B + C)

divide 5 from both sides

6A/5 = B + C

subtract B from both sides

6A/5 - B = C

3 0
3 years ago
Can people help me please to find the volume about question number 10 please and tell me the answer step by step please I need h
Alecsey [184]
#10
Volume of a cylinder: \pir²h

Plug the numbers in.

\pi3²15 = <span>424
</span>
The volume of the pipe is 424 cm³.
7 0
3 years ago
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