subject
Mathematics, 18.09.2021 14:20 potatoismeh1

Kami was simplifying the expression (2x - 3)(4x + 5) on a math exam.
She got the answer 8x – 15 but that
answer was not one of the choices.
What mistake did Kami make in
simplifying and what should her
answer have been?

ansver
Answers: 2

Another question on Mathematics

question
Mathematics, 21.06.2019 15:40
Evaluate the following expression 1/3^2
Answers: 1
question
Mathematics, 21.06.2019 19:30
Combine the information in the problem and the chart using the average balance method to solve the problem.
Answers: 2
question
Mathematics, 22.06.2019 00:20
Submarines control how much they float or sink in the ocean by changing the volume of air and water contained in large ballast tanks. when the tanks are completely full of water, the submarine increases its overall mass and sinks down to the bottom. when the tanks are completely full of air, the submarine reduces its overall mass and floats to the surface. depending on the density of the seawater surrounding the submarine, it will pump seawater in or out of the tanks in order to achieve the same overall density as the sea water and float neutrally in the water. the volume of the submarine never changes. when the tanks are completely full of water, a submarine with a volume of 7.8\times10^3\text{ m}^37.8×10 3 m 3 7, point, 8, times, 10, start superscript, 3, end superscript, space, m, start superscript, 3, end superscript has a total mass of 8\times10^6\text{ kg}8×10 6 kg8, times, 10, start superscript, 6, end superscript, space, k, g. the density of the seawater is 10^3\text{ kg/m}^310 3 kg/m 3 10, start superscript, 3, end superscript, space, k, g, slash, m, start superscript, 3, end superscript. to make that submarine float neutrally, and neither float nor sink in the ocean, what volume of water does that submarine need to subtract from its tanks?
Answers: 1
question
Mathematics, 22.06.2019 02:00
What is the area of this parallelogram? 434.28 cm2 263.67 cm2 527.34 cm2 217.14 cm2
Answers: 1
You know the right answer?
Kami was simplifying the expression (2x - 3)(4x + 5) on a math exam.
She got the answer 8x –...
Questions
question
Mathematics, 24.07.2019 00:30
Questions on the website: 13722362