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3 years ago

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Mathematics

2 answers:

Lemur [1.5K]3 years ago

8 0

Answer:

$5x^{3} -3x^{2}-5x+3$

Step-by-step explanation:

we have

$(5x^2 + 2x - 3)(x - 1)$

Applying the distributive property, group and combine like terms

$(5x^2 + 2x - 3)(x - 1)=5x^{2} *x-5x^{2}*1 +2x*x-2x*1-3*x+3*1\\ \\=5x^{3} -5x^{2}+2x^{2} -2x-3x+3\\ \\=5x^{3} -3x^{2}-5x+3$

Dmitriy789 [7]3 years ago

4 0

The answer to this question is 5x3-3x2-5x+3

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suppose that during one period of extreme cold the average daily temp decreased 1 1/2 Fahrenheit each day how many days did it t

Nina [5.8K]

Answer:

The temperature decreased by 9 °F in 6 days.

Step-by-step explanation:

Let the number of days it takes for the temperature to decrease by 9 °F be $x$ .

Given:

Average daily temperature decreases by $1\frac{1}{2}$ °F.

Decrease of temperature in 1 day = $1\frac{1}{2}$ = 1.5 °F.

∴ Decrease in temperature in x days is $1.5x$ .

Now, as per question, decrease in temperature in 'x' days is 9 °F.

Therefore, $1.5x=9$

$x=\frac{9}{1.5}$

$x=6$

Therefore, the temperature decreased by 9 °F in 6 days.

7 0

3 years ago

How do i solve using the substitution method? x+y=-1 y=-2x

leonid [27]

Answer:

$(1, -2)$

Step-by-step explanation:

Step 1: Set the second equation into the first

$x + (-2x) = -1$

$x - 2x = -1$

$-x / -1 = -1 / -1$

$x = 1$

Step 2: Solve the second equation

$y = -2(1)$

$y = -2$

Answer: $(1, -2)$

4 0

3 years ago

Read 2 more answers

What is the area of an isosceles trapezoid, if its shorter base has length of 18 cm, the length of the altitude is 9 cm, and the

padilas [110]

The formula for the area of a triangle of base b and altitude h is A = (1/2)(b)(h).

Here, b = 18 cm and h = 9 cm. Thus, the desired area is:

(18 cm)(9 cm)

A = ----------------------- = 81 cm^2

This problem gives you more info than is needed to solve it. The area of the given triangle is 81 cm^2.

5 0

4 years ago

-(x – 4) + 5 = 3x + 6 – x

slava [35]

Answer:

Step-by-step explanation:

-(x-4)+5=3x+6-x(BODMAS)

-x+4+5=3x+6-x(collect like terms )

4+5=3x+x-x

9=3x (divide both sides by 3)

9/3=3x/3

3=x

4 0

4 years ago

A line with a slope of -3/5 and passing through (-5,-1)

Vanyuwa [196]

Answer: y=-3/5x-4

Step-by-step explanation:

We can substitute this into point slope form, which is y-y1=m(x-x1).

y-(-1)=-3/5(x-(-5)

y+1=-3/5(x+5)

y+1=-3/5x-3

y=-3/5x-4

3 0

4 years ago