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3 years ago

Find the product of 3c and (4c - 5).

Mathematics

1 answer:

Yuri [45]3 years ago

4 0

Answer:

the correct ls D) = 12c^2-15

Step-by-step explanation:

Product means to multiply

3c (4c-5)

= (3c)(4c+5)

= (3c)(4c)+(3c)(-5)

= 12c^2-15

Oh and I got it correct on the USAPERtest

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the taco truck sells tacos for $3 and burritos for $4. the number of items sold on a tuesday is 125 with a total income of $430.

butalik [34]

Answer:

Step-by-step explanation:

Hi, to answer this question we have to write a system of equations:

3 T + 4 B =425

T + B = 125

Where T is the number of tacos sold, and B is the number of burritos sold.

Multiplying the second equation by 3, and subtracting it to the first equation:

3 T + 4 B =425

3T + 3B = 375

___________

B =50

Replacing B in any equation:

T + B = 125

T +50 =125

T =125-50

T = 75

Feel free to ask for more if needed or if you did not understand something.

5 0

3 years ago

What is the solution to the inequality d/7 + 4 (less than or equal to) 0

Goshia [24]

Answer:

d is less than or equal to -28

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

What’s the correct answer for this? Select all the ones the apply

Viefleur [7K]

Answer:

AE/AD=EB/DC

Step-by-step explanation:

6 0

3 years ago

Find the perimeter of a rectangle with a length of 9 yards and a width of 6 yards. Enter only the number of yards in the answer

BaLLatris [955]

Answer:

Step-by-step explanation:

4 0

3 years ago

PLE help ASAP!

koban [17]

Answer:

The time it would take the element to decay to 28 grams is approximately 22.5 minutes

Step-by-step explanation:

The give half life of element X = 6 minutes

The given initial mass of the radioactive element X = 390 grams

The mass of the element X after decay = 28 grams

The function that represent the decay of element X is given as follows here;

$y = a \cdot (0.5)^{\dfrac{t}{h} }$

Which is of the form;

$N(t) = N_0 \left (\dfrac{1}{2} \right )^{\dfrac{t}{t_{1/2}}$

Therefore;

h = 6 minutes = The time duration of the half life

a = N₀ = The initial mass = 390 g

N(t) = The final mass = 28 g

t = The time it takes the element to decay

Plugging in the values gives;

$28 = 390 \times(0.5)^{\dfrac{t}{6} }$

$(0.5)^{\dfrac{t}{6} } = \dfrac{28}{390}$

Therefore;

$\dfrac{t}{6} \times ln\left(0.5} \right) = ln \left(\dfrac{28}{390} \right)$

t/6 = ln(29/390)/ln(0.5)

t = 6 × ln(29/390)/ln(0.5) ≈ 22.496

Given the answer to the nearest tenth of a minute, the time it would take the element to decay to 28 grams, t ≈ 22.5 minutes.

3 0

3 years ago