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3 years ago

8(1/2u+3/4)

Mathematics

1 answer:

netineya [11]3 years ago

4 0

Answer:

4u+3

Step-by-step explanation: 8/1*1/2= 8/2=4u

8/1*3/4= 24/8=3

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Y=1/2x-3 Need it graphed only need the x and y intercept

MaRussiya [10]

Here u gooo hope this helps

8 0

3 years ago

Read 2 more answers

Simplify. Show your work. (2√(5)+3√(7))^2

frozen [14]

Answer:

The answer is: 83 + 12√35

(a + b)² = a² + 2ab + b²

In (2√5 + 3√7)², a = 2√5, b = 3√7

Just substitute a and b:

(a + b)² = a² + 2ab + b² = (2√5)² + 2 * 2√5 * 3√7 + (3√7)² =

= 2²√5² + 2 * 2 * 3 * √5 * √7 + 3²√7² =

= 4 * 5 + 12 * √(5*7) + 9 * 7 =

= 20 + 12 *√35 + 63 =

= 83 + 12√35

Step-by-step explanation:

3 0

3 years ago

Help. i need itttttt

ElenaW [278]

Answer:

In a parallelogram, opposite sides are the same length. If PR = ST, then the same would happen for the other sides.

Step-by-step explanation:

8 0

3 years ago

The concentration of dichlorodiphenyltrichloroethane (DDT - an infamous pesticide) in Lake Michigan has been declining exponenti

mojhsa [17]

Answer: A) $y=13e^{-0.1359t}$

B) H = 5.10

C) Yes

Step-by-step explanation: Exponential Decay function is a model that describes the reducing of an amount by a constant rate over time. Generally, it is written in the form: $y(t)=Ce^{rt}$

A) C is initial quantity, in this case, the initial concentration of DDT. To determine r, using the data given:

$y(t)=Ce^{rt}$

$2.22=13e^{13r}$

$e^{13r}=0.1708$

Using a natural logarithm property called power rule:

$13r=ln(0.1708)$

$r=\frac{ln(0.1708)}{13}$

$r=-0.1359$

The decay function for concentration of DDT through the years is $y(t)=13e^{-0.1359t}$

B) The value of H is calculated by $y=C(0.5)^{\frac{t}{H} }$

$2.22=13(0.5)^{\frac{13}{H} }$

$(0.5)^{\frac{13}{H} }=0.1708$

Again, using power rule for logarithm:

$\frac{13}{H} log(0.5)=log(0.1708)$

$\frac{13}{H} =\frac{log(0.1708)}{log(0.5)}$

$\frac{13}{H} =2.55$

H = 5.10

Constant H in the half-life formula is H=5.10

C) Using model $y(t)=13e^{-0.1359t}$ to determine concentration of DDT in 1995:

$y(24)=13e^{-0.1359.24}$

y(24) = 0.5

By 1995, the concentration of DDT is 0.5 ppm, so using this model is possible to reduce such amount and more of DDT.

8 0

2 years ago

What is the distance between points (4,2) (6,-5)

egoroff_w [7]

Answer:

Exact form:

$\sqrt{53}$

Decimal Form:

7.280109889280518

Step-by-step explanation:

Use the distance formula to determine the distance between 2 points.

Distance = $\sqrt{(x_{2} -x_{1}) ^2+(y_{2} -y_{1}) ^2$

$\sqrt{6-4^2+(-5-2)^2$

$\sqrt{(2)^2+(-7)^2}$

$\sqrt{4+49}$

$\sqrt{53}$ ≈ 7.280109889280518

5 0

3 years ago