All categories

3 years ago

K(t)=10t-19 K(-7)=? Someone please help me

Mathematics

1 answer:

Sliva [168]3 years ago

5 0

Answer:

k(- 7) = - 89

Step-by-step explanation:

To evaluate k(- 7), substitute t = - 7 into k(t), that is

k(- 7) = 10(- 7) - 19 = - 70 - 19 = - 89

You might be interested in

Determine the number of lines of symmetry and the number of rotation symmetries for each of the following sea organisms.

Alex777 [14]

There are 9 lines of symmetry and infinite rotational symmetries in first figure,4 lines of symmetry and no rotational symmetries in second figure,6 lines of symmetry and infinite rotational symmetries in third figure,1 line of symmetry and infinite rotational symmetries in fourth figure.

Given four figures.

We are required to find the number of lines of symmetry and rotational symmtries.

Symmetry lines are those lines which act as shape in such a way that both parts are like mirror image.

Rotational symmetry is the property that a shape has when it looks same after some turn.

There are 9 lines of symmetry and infinite rotational symmetries in first figure.

There are 4 lines of symmetry and no rotational symmetries in second figure.

There are 6 lines of symmetry and infinite rotational symmetries in third figure.

There is 1 line of symmetry and infinite rotational symmetries in fourth figure.

Hence there are 9 lines of symmetry and infinite rotational symmetries in first figure,4 lines of symmetry and no rotational symmetries in second figure,6 lines of symmetry and infinite rotational symmetries in third figure,1 line of symmetry and infinite rotational symmetries in fourth figure.

Learn more about symmetry lines at brainly.com/question/1553710

#SPJ1

6 0

2 years ago

The temperature is -3 degrees celcius at sunrise. By noon, the temperature changes by 5 degrees. What is the possible temperatur

lina2011 [118]

Answer:

$- 3 + 5 \\ 2$

The answer is 2 degrees Celsius

6 0

3 years ago

Read 2 more answers

I did something wrong could you help?

posledela

Answer:

Slope = 1/2

y-intercept = 30

Equation : y = 1/2x + 30

D. 150 miles

Step-by-step explanation:

We can use the two visible points you marked on the graph.

They are (0,30) which is also the y-intercept and (20,40).

Calculate change of y over change of x.

10/20 or 1/2

So the slope is 1/2 and the y-intercept is 30.

Therefore, using y = mx + b form, the equation is y = 1/2x + 30

Then, to find how many miles you drove if the cost was $105, we can plug in 105 for y in the equation.

105 = 1/2x + 30

75 = 1/2x

x = 150

8 0

4 years ago

Need help with a math question

LiRa [457]

Answer:

x=7

Step-by-step explanation:

Equate the angles 7x-7 and 4x+14 and solve:

7x-7 = 4x+14

7x-4x = 14+7

3x = 21

x = 7

5 0

3 years ago

Read 2 more answers

A rate of deposit of dust from unpolluted air is 10.0 tons per square mile per month (30 days). what is this dust fall, in milli

valina [46]

The rate of dust deposition is
$Rate= \frac{10 \,tons}{mi^{2}-30\,days} = \frac{1}{3} \, \frac{tons}{mi^{2}-day}$

Note that
1 ton = 9.07185 x 10⁵ g = 9.07185 x 10⁸ mg
1 mi = 1609.34 m = 1.60934 x 10³ m
1 day = 24 h

Therefore
$Rate=( \frac{1}{3}\, \frac{tons}{mi^{2}-day} )*( \frac{1}{24} \, \frac{day}{h} )*( \frac{1}{1.60934\times10^{3}}\, \frac{mi}{m} )^{2}*(9.07185\times10^{8}\, \frac{mg}{ton})\\= 4.865\, \frac{mg}{m^{2}-h}$

Answer: $4.865\, \frac{mg}{m^{2}-h}$

3 0

3 years ago