All categories

3 years ago

15 point !!!!!!!!!!!!!! please me with this problem.

Mathematics

2 answers:

Reika [66]3 years ago

3 0

3- all you have to do is 4.7 + 4.7
4 same thing just add that number to itself
For #5 take 25.6 and divide it by 2 and that’s your radius.

Explanation- the radius is half of the diameter

ivanzaharov [21]3 years ago

3 0

Answer:

3. 29.53; 4. 70. 99999397.....; 160.85?

Step-by-step explanation:

I just used the formula 2 x $\pi$ x r=C

You might be interested in

Use determinants to find out if the matrix is invertible.

wariber [46]

Answer:

The matrix is not invertible.

Step-by-step explanation:

We are given the following matrix in the question:

$A =\left[\begin{array}{ccc}-5&0&1\\-1&3&2\\0&10&6\end{array}\right]$

Condition for invertible matrix:

A matrix is invertible if and only if the the determinant is non-zero.

We can find the determinant of the matrix as:

$|A| = -5[(3)(6)-(2)(10)]-0[(-1)(6)-(2)(0)] + 1[(-1)(10)-(3)(0)]\\|A| = -5(18-20)+(-10)\\|A| = 10-10\\|A| = 0$

Since the determinant of the given matrix is zero, the given matrix is not invertible.

5 0

3 years ago

I don’t really understand this

PtichkaEL [24]

Answer:

you put the -3 where the x's are

Step-by-step explanation:

f(x)= -2(-3)^2 - 3(-3) + 6

i think i hope thats right

3 0

3 years ago

Read 2 more answers

Multiple. 7i (4-2i)

Eddi Din [679]

Answer:

14+28i

Step-by-step explanation:

7 0

2 years ago

NO LINKS!! Please help me

Tatiana [17]

Answer:

Step-by-step explanation:

Since cosine is positive and sine is negative that puts θ in Quad IV.

From right triangles we know:

Cos θ = adjacent/hypotenuse = 5/13

sin θ = opposite/hypotenuse = ?/13

To find the opposite side across from θ use the pythagorean theorem.

5² + y² = 13²

25 + y² = 169

y² = 144

y = 12

we are given that sin is < 0 so sinθ = -12/13

6 0

2 years ago

Read 2 more answers

A cellphone company charges $60 for a cellphone and a monthly rate to use the phone.Regina will pay $1,140 for a 24-month cellph

Alinara [238K]

The monthly rate is $45 for this cellphone plan.

Step-by-step explanation:

Given,

Amount charged for cell phone = $60

Amount paid by Regina for 24 month plan = $1140

Number of months = 24

Let,

m be the monthly rate for cellphone plan

Number of months * Monthly rate + cellphone charges = Amount paid

$24m+60=1140\\24m=1140-60\\24m=1080$

Dividing both sides by 24

$\frac{24m}{24}=\frac{1080}{24}\\m=45$

The monthly rate is $45 for this cellphone plan.

Keywords: subtraction, division

Learn more about subtraction at:

#LearnwithBrainly

7 0

2 years ago