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3 years ago

Solve the following quadratic equations using factoring. b. x2 + 3x = 70

Mathematics

1 answer:

Katarina [22]3 years ago

6 0

We can easily silve it by splitting the middle term or by using the discriminate method *

<h3>* <u>splitting</u></h3>

x 2 +3x -70

x2 + 10x - 7x -70

x(x + 10) -7(x +10)

(x / 7) ( x + 10)

x = 7 or -10

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Can someone help me with this problem

Alex_Xolod [135]

Answer:

Step-by-step explanation:

The formula of a distance between two points:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

A(-3, 0) , B(3, 2)

$AB=\sqrt{(3-(-3))^2+(2-0)^2}=\sqrt{6^2+2^2}=\sqrt{36+4}=\sqrt{40}=\sqrt{4\cdot10}=\sqrt4\cdot\sqrt{10}=2\sqrt{10}$

A(-3, 0), D(-2, -3)

$AD=\sqrt{(-2-(-3))^2+(-3-0)^2}=\sqrt{1^2+(-3)^2}=\sqrt{1+9}=\sqrt{10}$

AB = CD and AD = BC

The area of a rectangle:

$A=(AB)(AD)$

Substitute:

$A=(2\sqrt{10})(\sqrt{10})=(2)(10)=20$

The perimeter of a rectangle:

$P=2(AB+AD)$

Substitute:

$P=2(2\sqrt{10}+\sqrt{10})=2(3\sqrt{10})=6\sqrt{10}$

4 0

3 years ago

TIME REM

UNO [17]

According to the graph it can be inferred that the percentage of people for each transmission preference is relatively the same for left-handed and right-handed people (option D)

<h3>How to read the graph?</h3>

The graph shows two bars representing left-handed respondents and right-handed respondents. In the bars there is a blue division that represents the percentage of respondents who prefer manual transmission.

In both cases, the number of people is similar for both variables (manual and automatic) because for every 100 people surveyed, about 20 people prefer manual transmission regardless of whether they are right-handed or left-handed.

Learn more about preferences in: brainly.com/question/7018716

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3 years ago

Which value represents solutions to cos(π/4-x) = √2/2sinx, where x [0, 2π)

Solnce55 [7]

Answer:

it is c

Step-by-step explanation:

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3 years ago

What is the area of this figure

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