3 years ago

Which multiplication problem is represented by the model

Mathematics

1 answer:

Ivenika [448]3 years ago

3 0

Answer:

It's the second one. Press 'Ask For Help' if you need more help on problems

You might be interested in

Please solve these questions. (Geometry)

son4ous [18]

No idea what this is, sorry

5 0

4 years ago

Easy question for smort people

Vesnalui [34]

Answer:

this angle is a right angle(90°)

and one of the 2 angles is 30

3x+30=90

3x=90-30

3x=60

x=20

==> B

7 0

3 years ago

Read 2 more answers

F(x)=(x+2)^3-4<br> What is the slope?

kipiarov [429]

Use the slope-intercept y=mx+b to find slope
Slope=m
M=3

4 0

3 years ago

Read 2 more answers

When the sum of \, 528 \, and three times a positive number is subtracted from the square of the number, the result is \, 120. F

aleksandr82 [10.1K]

Let $x$ be the unknown number. So, three times that number means $3x$ , and the square of the number is $x^2$

We have to sum 528 and three times the number, so we have $528+3x$

Then, we have to subtract this number from $x^2$ , so we have

$x^2-(3x+528)$

The result is 120, so the equation is

$x^2 - 3x - 528 = 120 \iff x^2 - 3x - 648 = 0$

This is a quadratic equation, i.e. an equation like $ax^2+bx+c=0$ . These equation can be solved - assuming they have a solution - with the following formula

$x_{1,2} = \dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

If you plug the values from your equation, you have

$x_{1,2} = \dfrac{3\pm\sqrt{9-4\cdot(-648)}}{2} = \dfrac{3\pm\sqrt{9+2592}}{2} = \dfrac{3\pm\sqrt{2601}}{2} = \dfrac{3\pm51}{2}$

So, the two solutions would be

$x = \dfrac{3+51}{2} = \dfrac{54}{2} = 27$

$x = \dfrac{3-51}{2} = \dfrac{-48}{2} = -24$

But we know that x is positive, so we only accept the solution $x = 27$

6 0

3 years ago

P(less than 5)<br> Write as a fraction,percent and decimal

AVprozaik [17]

1/2 &50 0.5 hope this helps

6 0

2 years ago