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3 years ago

8

Plsss help me!!!!

1 answer:

soldi70 [24.7K]3 years ago

5 0

A#b=ab+a+b
Replace a with 2 and b with 5
2#5=2*5+2+5=17
Answer C

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AFLATI 2 NUMERE STIIND CA AL DOILEA NUMAR ESTE DE 7 ORI MAI MARE DECITPRIMUL IAR SUMA DINTRE DUBLUL PRIMULUI NUMAR SI TRIPLUL CE

postnew [5]

Answer:

The numbers are 20 and 140

Step-by-step explanation:

<u><em>The question in English is</em></u>

Find 2 numbers knowing that the second number is 7 times greater than the first, and the sum between the double of the first number and the triple of the second is 460

Define the variables

Let

x ----> the first number

y ----> the second number

we know that

$y=7x$ -----> equation A

$2x+3y=460$ ----> equation B

Solve the system of equations by substitution

Substitute equation A in equation B

$2x+3(7x)=460$

solve for x

$2x+21x=460$

$23x=460$

$x=20$

<em>Find the value of y</em>

$y=7x$ ----> $y=7(20)=140$

The numbers are 20 and 140

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3 years ago

Dalton's sister Dorina plays basketball and makes 84% of her free throws. If she attempts 225 free

mrs_skeptik [129]

She would make C. 189

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2 years ago

This lesson discusses _____ related to the circle.

galina1969 [7]

Answer:

Theorems

Step-by-step explanation:

Theorems is the right answer.

A circle is a geometric figure where all points on the circle keep equal distances from a point called the centre.

A circle has so many important properties.

The important of these are called theorems related to circles.

Some of the theorems are

i)Central angle theorem

ii) Opposite angles are supplementary for a cyclic quadrilateral, etc

Hence theorems would be the appropriate word for filling up the answer

7 0

2 years ago

Read 2 more answers

In each diagram, ∆ABC has been transformed to yield ∆A'B'C'. Which transformation could NOT be achieved by rotation alone?

Cloud [144]

Answer:

Graph D

Step-by-step explanation:

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3 years ago

Solve the given differential equation by using an appropriate substitution. The DE is a Bernoulli equation.

Mama L [17]

Multiplying both sides by $y^2$ gives

$xy^2\dfrac{\mathrm dy}{\mathrm dx}+y^3=1$

so that substituting $v=y^3$ and hence $\frac{\mathrm dv}{\mathrm dv}=3y^2\frac{\mathrm dy}{\mathrm dx}$ gives the linear ODE,

$\dfrac x3\dfrac{\mathrm dv}{\mathrm dx}+v=1$

Now multiply both sides by $3x^2$ to get

$x^3\dfrac{\mathrm dv}{\mathrm dx}+3x^2v=3x^2$

so that the left side condenses into the derivative of a product.

$\dfrac{\mathrm d}{\mathrm dx}[x^3v]=3x^2$

Integrate both sides, then solve for $v$ , then for $y$ :

$x^3v=\displaystyle\int3x^2\,\mathrm dx$

$x^3v=x^3+C$

$v=1+\dfrac C{x^3}$

$y^3=1+\dfrac C{x^3}$

$\boxed{y=\sqrt[3]{1+\dfrac C{x^3}}}$

6 0

3 years ago