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3 years ago

Pleaseee help, I’m rubbish at maths :/

Mathematics

1 answer:

yKpoI14uk [10]3 years ago

3 0

Answer:

4 row: 6,5,7,5

5 row: 6,8

6 row: 5,4,6,4

For 7: 4/25

For greater than 7: 1/25

Step-by-step explanation:

Total is 25

For 7: 4/25

For greater than 7: 1/25

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If you transform x2+ y2 = 25 into 4x2+ 4y2 = 25, which option below describes the effect of this transformation on the

balu736 [363]

Answer:

It divides the radius by 2, which is the last option in your list of possible answers.

Step-by-step explanation:

Recall that the standard equation of a circle of radius R centered at the origin of coordinates is given by:

$x^2+y^2=R^2$

so when you have the first equation of the circle:

$x^2+y^2=R^2\\x^2+y^2=25\\x^2+y^2=5^2$

The radius of the circle was 5

Now, when you work with the second equation, we need to divide both sides by 4 in order to get the standard form of the circle and be able to understand what the radius is:

$4x^2+4y^2=25\\x^2+y^2=\frac{25}{4} \\x^2+y^2=(\frac{5}{2})^2$

So we see that the initial radius 5 is now divided by 2.

8 0

4 years ago

What is the answer. Do anything begging for help

mario62 [17]

Answer:what’s the question?

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

I’m having trouble with this question I need some help please

vivado [14]

Answer:

$\frac{1}{2} \: \: \: \: \: \frac{1}{4 \: } \: \: \: \frac{1}{8}$

$\frac{4}{8} \: \: \: \frac{2}{8} \: \: \: \frac{1}{8}$

She ate

$\frac{7}{8}$

8 0

3 years ago

Given two vectors a⃗ =4.00i^+7.00j^ and b⃗ =5.00i^−2.00j^ , find the vector product a⃗ ×b⃗ (expressed in unit vectors). what is

FinnZ [79.3K]

The vector product of $\boxed{a \times b = - 43\hat k}$ and the magnitude of $a \times b$ is $\boxed{43}.$

Further explanation:

Given:

Vector a is $\vec a = 4.00\hat i + 7.00\hat j.$

Vector b is $\vec b = 5.00\hat i - 2.00\hat j.$

Explanation:

The cross product of a \times b can be obtained as follows,

$\begin{aligned}a \times b &= \left| {\begin{array}{*{20}{c}}{\hat i}&{\hat j}&{\hat k} \\4&7&0\\5&{ - 2}&0 \end{array}}\right|\\&= \hat i\left( {0 - 0} \right) - \hat j\left( {0 - 0} \right) + \hat k\left( { - 9 - 35} \right)\\&= 0\hat i - 0\hat j - 43\hat k\\&= - 43\hat k\\\end{aligned}$

The vector can be expressed as follows,

$a \times b = - 43\hat k$

The magnitude of $a \times b$ can be obtained as follows,

$\begin{aligned}\left| {a \times b} \right| &= \sqrt {{0^2} + {0^2} + {{\left( { - 43} \right)}^2}}\\&= \sqrt {{{43}^2}}\\&= 43\\\end{aligned}$ 43404

The vector product of $\boxed{a \times b = - 43\hat k}$ and the magnitude of $a \times b$ is $\boxed{43}.$

Learn more:

Learn more about inverse of the functionhttps://brainly.com/question/1632445.
Learn more about equation of circle brainly.com/question/1506955.
Learn more about range and domain of the function brainly.com/question/3412497

Answer details:

Grade: High School

Subject: Mathematics

Chapter: Vectors

Keywords: two vectors, vector product, expressed in unit vectors, magnitude, vector a, vector b, a=4.00i^+7.00j^, b=5.00i^-2.00j^, unit vectors, vector space.

8 0

3 years ago

Read 2 more answers

The ratio of the side lengths for a triangle is exactly 7:11:13. in a second triangle similar to the first, the shortest side is

topjm [15]

9 / 7 = 1.285
1.285 × 13 = 16.71 inch

7 0

3 years ago