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3 years ago

9x8=(10x8)-(18x8 can someone help please

Mathematics

1 answer:

Andrei [34K]3 years ago

7 0

Answer:

x=0

$9x\cdot \:8=\left(10x\cdot \:8\right)-\left(18x\cdot \:8\right)$

$9x\cdot \:8=10x\cdot \:8-18x\cdot \:8$

$9x\cdot \:8=80x-18\cdot \:8x$

$9x\cdot \:8=80x-144x$

$9x\cdot \:8=-64x$

$72x=-64x$

$72x+64x=-64x+64x$

$36x=0$

$\frac{136x}{136}=\frac{0}{136}$

x=0

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Each part of a race is 1/10 mile long. Marsha finished 5 part of the race.How far did marsha race?

andre [41]

We can multiply the number of parts Marsha has finished by the miles of each part:

5 × 1/10

= 5/10

=1/2

Therefore, she raced 1/2 miles.

Hope it helps!

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3 years ago

20 divided by X is 100, what does X equal?

ahrayia [7]

20/ X= 100
⇒ X= 20/100 (inverse operation)
⇒ X= 1/5

Final answer: X= 1/5

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2 years ago

In f(x) = 2x2 − 8x − 10, the y-intercept is ? at ? and the x-intercepts are (-1, 0) and ? .

IgorLugansk [536]

<h2>1. y-intercept</h2>

$\boxed{(0,-10)}$

The quadratic function $f(x)=2x^22-8x-10$ represents a parabola. In fact, the graph of a quadratic function is a special type of U-shaped curve called a parabola. To find the y intercept, we set $x=0$ as follows:

$f(x)=2x^2-8x-10 \\ \\ If \ x=0 \rightarrow f(0)=-10 \\ \\ Then \ y-intercept: \\ \\ (0,-10)$

<h2>2. x-intercepts</h2>

$\boxed{(-1,0) \ and \ (5,0)}$

To find the other x-intercept, we must set $y=0$ as follows:

$f(x)=2x^2-8x-10 \\ \\ If \ y=0 \rightarrow 2x^2-8x-10=0 \\ \\ Using \ the \ quadratic \ formula: \\ \\ x=\frac{-b \pm \sqrt{b^2-4ac}}{2a} \\ \\ \therefore x=\frac{-(-8) \pm \sqrt{(-b)^2-4(2)(-10)}}{2(2)} \\ \\ \therefore x_{1}=-1 \ and \ x_{2}=5$

Therefore, the other x-intercept is $(5,0)$ . You can see both the y-intercept and the x-intercepts in the figure below.

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3 years ago

Find the volume of the sphere .

mars1129 [50]

Answer:

1436.8cm³

Step-by-step explanation:

Formula :

$\frac{4}{3} \times \pi \times r ^{3}$

$\frac{4}{3} \times \pi \times 7^{3}$

=1436.75504cm³

to 1dp

=1436.8cm³

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3 years ago

Rewrite 6/4 as a percent

emmainna [20.7K]

Hey there!

$\left[\begin{array}{ccc}\boxed{\boxed{ \frac{6}{4}}} \end{array}\right] = \left[\begin{array}{ccc}\boxed{\boxed{150}}\end{array}\right]$

All I did was to multiply each side by 100 which then go me this!

Hope this helps!

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2 years ago

Read 2 more answers