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3 years ago

What is the value of the expression 6.5 - (-7.25)?

Mathematics

1 answer:

adell [148]3 years ago

5 0

Answer:

13.75

Step-by-step explanation:

Slash and dash. turn the both minuses into positives and add like normal. 6.5 plus 7.25 equals 13.75.

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Solve for x: 4(x + 2) = 3(x - 2)

Pani-rosa [81]

Answer:

x = -14

Step-by-step explanation:

Step 1: Write equation

4(x + 2) = 3(x - 2)

Step 2: Solve for x

Distribute: 4x + 8 = 3x - 6
Subtract 3x on both sides: x + 8 = -6
Subtract 8 on both sides: x = -14

Step 3: Check

Plug in x to verify it's a solution.

4(-14 + 2) = 3(-14 - 2)

4(-12) = 3(-16)

-48 = -48

7 0

3 years ago

Read 2 more answers

A city with a population of 800,000 has been growing at a rate of 7% per year. If this rate continues, find the population of th

Contact [7]

Answer:

Step-by-step explanation:

Population(pop) = 800,000 people

Growth rate=7℅

Pop growth in a year= ((100+7)÷100) × 800000 =856000people

Pop in 20 years = 856000×20

=17,120,000 people

4 0

3 years ago

When a water-cooled nuclear power plant is in operation, oxygen in the water is transmuted to nitrogen-17. After the reactor is

wolverine [178]

Answer:

The differential equation is $\frac{dR}{dt} = -kR$

Step-by-step explanation:

Differential equation for the rate of change in radiation level:

Radiation level is R.

Rate of change indicates that the radiation level R varies in function of time t, which mathematically means that we have:

$\frac{dR}{dt}$

After the reactor is shut down, the radiation from the nitrogen-17 decreases in such a way that the rate of change in the radiation level is directly proportional to the radiation level.

Rate of change is k. Decreases means that k is negative. Proportional to the radiation level of R means that -k multiplies R. So the differential equation is:

$\frac{dR}{dt} = -kR$

7 0

3 years ago

Denise bought 116 ounces of beans for a bean dip. She bought both 15-ounce cans and 28-ounce cans, and the total number of cans

Valentin [98]

15x + 28y = 116
x + y = 6

that would be ur system of equations

7 0

3 years ago

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Select an expression equal to 6(4q + 8r)

Masteriza [31]

Answer: B: 24q+48r

Step-by-step explanation: 6(4q+8r)

=(6)(4q+8r)

=(6)(4q)+(6)(8r)

=24q+48r

8 0

3 years ago