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3 years ago

13

Please help me :) i would appreciate it a lot

1 answer:

Kobotan [32]3 years ago

3 0

Answer:

4

Step-by-step explanation:

1.5 -(-2.5)

Change -(- into addition

1.5 + 2.5 = 4

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Solve the system be either substitution or elimination 3x-5y=21 and 2x+y=1

IRISSAK [1]

Answer:

(2,-3)

Step-by-step explanation:

I used substitution and rearranged the second equation to y=-2x+1. Then I replaced the y in the first equation with -2x+1. So, I got 3x-5(-2x+1)=21. When you solve that you get 13x=26 or x=2. Then you replace x with 2 in either equation and end up with y=-3.

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3 years ago

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Name 2 decimals whose difference is 0.4

marta [7]

Answer:

0.1 and 0.5

Step-by-step explanation:

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3 years ago

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Given an initial quantity Q0=150 and a growth rate of 7% per unit time, give a formula for the quantity Q as a function of time

rodikova [14]

Answer:

Step-by-step explanation:

From the given information:

(a)

Since growth quantity is not continuous

$Q(t) = 150 (1.07)^t$

For t = 10

$Q(10) = 150 (1.07)^{10}$

$\mathbf{Q(10) = 295.073}$

(b)

Here, for a continuous growth rate, the growth quantity can be computed in terms of initial quantity and the growth rate.

i.e.

$Q(t) = 150 e^{0.07t}$

At t = 10 for a continuous growth rate;

$Q(10) = 150 e^{0.07 \times 10}$

$Q(10) = 150 e^{0.7}$

$\mathbf{Q(10) = 302.063}$

8 0

3 years ago

It takes 3 hours to cook an 8-pound turkey. How long would it take to cook a turkey that is 14 pounds? Round to the nearest tent

pochemuha

Answer:

5.3 hours

Step-by-step explanation:

Given:

3 hours = 8lbs. turkey

?? hours = 14lbs. turkey

Do proportions:

$\frac{3}{8}$ = $\frac{x}{14}$ <-- Cross Multiply

42 = 8x <-- Solve for x

x = 5.25

Round to the nearest tenth:

x = 5.3 hours

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3 years ago

At noon the temperature on Jessica's porch was 75 f .Then the temperature dropped d degrees. By midnight, the temperature on the

Nina [5.8K]

Answer:

D is 12

Step-by-step explanation:

75 - 63 = 12 = D

6 0

2 years ago