Help please! I just don’t understand

Answer:

260 miles

Step-by-step explanation:

Sara made it to her destination in four hours, while Holly made it to her destination traveling 260 miles. This can be calculated by taking Sara's 200 miles, and dividing it by 50 mph to get a total of four hours spent driving. If Holly is also driving for four hours, but instead traveling at 65 mph, you can take 65 and multiply it by four hours to get a total of 260 miles. Hope this helps!

Answer:

A) -2x + y = 3

Step-by-step explanation:

The equation of the line that is perpendicular to the given line and passes through its y-intercept is -2x + y = 3.

We are given that;

The equation= 2x + 4y - 12

Now,

The given line is 2x + 4y - 12 = 0.

To find the slope of a line perpendicular to this line, we need to find the slope of the given line first.

Rewrite the equation in slope-intercept form which is given by:

y = mx + b

where m is the slope and b is the y-intercept.

2x + 4y - 12 = 0

4y = -2x + 12

y = (-1/2)x + 3

Hence, the slope of the given line is -1/2.

The slope of a line perpendicular to this line is the negative reciprocal of this slope which is given by:

[tex]m(perpendicular)[/tex] = -1/m = -1/(-1/2) = 2

To find an equation of a line that passes through the y-intercept of the given line and has a slope of 2.

The y-intercept of the given line can be found by setting x = 0:

2(0) + 4y - 12 = 0

y = 3

Hence, the y-intercept of the given line is 3.

The equation of a line with a slope of 2 and passing through (0,3) can be found using point-slope form which is given by:

y - y1 = m(x - x1)

where (x1,y1) = (0,3) and m = 2.

Substituting these values we get:

y - 3 = 2(x - 0)

y - 3 = 2x

y = 2x + 3

Therefore, by the equation answer will be -2x + y = 3.

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Answer:

A

Step-by-step explanation:

i just know :)

Answer/Step-by-step explanation:

When twi straight lines intersect, they form 2 pairs of opposite vertical angles that are congruent.

In the diagram given, the following pairs of vertical angles are formed:

<c and 40°

<b and <d

<c = 40° (vertical angles are congruent)

<b and 40° are linear pairs. They are both supplementary. Therefore:

<b = 180° - 40

<b = 140°

<d = <b (vertical angles)

<d = 140° (substitution)

Answer:

B

Step-by-step explanation:

From the figure, its clear that the compass drew arcs like below:

With A as centre, and more than half of the length of AB as radius, one arc is drawn.

With the same radius, with B as centre, another arc is drawn.

The points of intersections of the arcs are X and Y.

Clearly, this is the construction of a perpendicular bisector of the line segment AB.

Hence, if we draw a line segment through XY, it will be a perpendicular bisector of AB.

Step-by-step explanation:

Answer:

[tex]x = 8[/tex]

Step-by-step explanation:

Given:

[tex]DG = 10[/tex]

See attachment for complete question.

From the attachment, we can conclude that:

[tex]x + 1 + 2x - 15 = DG[/tex]

Substitute 10 for DG

[tex]x + 1 + 2x - 15 = 10[/tex]

Collect Like Terms

[tex]x + 2x = 10 + 15 - 1[/tex]

[tex]3x = 24[/tex]

Solve for x

[tex]x = 24/3[/tex]

[tex]x = 8[/tex]

Answer:

[tex]x=\frac{-3c-v}{a-3};\quad \:a\ne \:3[/tex]

Step-by-step explanation:

--expand--

ax+v=3x-3c

--subtract v from each side--

ax+v-v=3x-3c-v

--simplfy--

ax=3x-3c-v

--subtract 3x from both side--

ax-3x=3x-3c-v-3x

--simplfiy--

--factor--(factor out the x from ax-3)

[tex]x\left(a-3\right)=-3c-v[/tex]

[tex]\frac{x\left(a-3\right)}{a-3}=-\frac{3c}{a-3}-\frac{v}{a-3};\quad \:a\ne \:3[/tex]

[tex]x=\frac{-3c-v}{a-3};\quad \:a\ne \:3[/tex]

<3

Red

Answer:

Step-by-step explanation:

6.8

7.4

8.3

6.7

Step-by-step explanation:

Hey there!

Here; The coordinates are ; H(-4,-2), G(-5,3), F(-2,1)

The translation P(x,y) = P'(X+7,y)

Use same formula.

H(-4,-2) -------> P'(3,-2)

G(-5,3)-----------> G'(2,3)

F(-2,1)------------> F'(5,1)

Therefore, the answer is Option C.

Hope it helps..

Step-by-step explanation:

E3, E6, E11, E7: no solution

E1, E12 : 1 solution

E2, E8, E10 : infinite solutions

Answer:

See attached

Step-by-step explanation:

The answer is attached

Infinitely many solutions

One solution

No solution

Answer:

I think the answer may be 30....But that's only a random guess

Plsss lemme know the real answer in the comments

Step-by-step explanation:

Answer:

I believe the answer is D.25

Step-by-step explanation:

Hope this helps!!

Answer:

umm hey

Step-by-step explanation:

Answer:

munny

Step-by-step explanation:

Answer:

Unit Rate = (4/9)/(3/5) = (4/9)(5/3) = 20/27 pages per minute

Report 01/07/18

Step-by-step explanation:

Answer:

1.05 × 10^-3

Step-by-step explanation:

The decimal number 0.00105 in scientific notation is  [tex]1.05 \times 10^{-3}.[/tex]

Scientific notation is a way to represent numbers that are either very large or very small.

It consists of two parts: the coefficient and the exponent.

The coefficient is a decimal number between 1 and 10, and the exponent indicates the power of 10 by which the coefficient is multiplied.

In the case of 0.00105, we can express it in scientific notation as [tex]1.05 \times 10^{-3}.[/tex]

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Answer:

68°F is 20°C

Step-by-step explanation:

C = (5/9)(F - 32)

C = (5/9)(68 - 32)

C = (5/9)(36)

C = 5 * 4

C = 20

Answer: 68°F is 20°C

Answer:

2√

Step-by-step explanation:

Answer:

2√

Step-by-step explanation:

Answer:

1

Step-by-step explanation:

Answer:

C.

Step-by-step explanation:

got it right on edge :)

The given trig function consist of trig values of common angles;

The values that represent the solution to [tex]\mathbf{cos \left(\dfrac{\pi}{4} - x\right)} = \dfrac{\sqrt{2} }{2} \cdot sin \, x[/tex], x ∈ [0, 2·π) are;

[tex]x = \left\{\dfrac{\pi}{2} , \, or \ \dfrac{3 \cdot \pi}{2} \right \}[/tex]

Reason:

The given function is presented as follows;

[tex]cos \left(\dfrac{\pi}{4} - x\right) = \dfrac{\sqrt{2} }{2} \cdot sin \, x[/tex]

Where;

x ∈ [0, 2·π)

We have;

cos(A - B) = cos(A)·cos(B) - sin(A)·sin(B)

[tex]cos \left(\dfrac{\pi}{4} \right) = \dfrac{\sqrt{2} }{2}, \ sin\left(\dfrac{\pi}{4} \right) = \dfrac{\sqrt{2} }{2}[/tex]

Which gives

[tex]cos \left(\dfrac{\pi}{4} - x\right) =\dfrac{\sqrt{2} }{2} \cdot cos \, x + \dfrac{\sqrt{2} }{2} \cdot sin \, x[/tex]

Therefore, we get;

[tex]\dfrac{\sqrt{2} }{2} \cdot cos \, x = \dfrac{\sqrt{2} }{2} \cdot sin \, x - \dfrac{\sqrt{2} }{2} \cdot sin \, x = 0[/tex]

cos x = 0

Therefore;

Where;

n = 1, 3, 5, ...

x ∈ [0, 2·π)

We get;

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Answer:

The sum of 20 and a number,m = 20+m

Answer:

no you can not make 1 into a triangle

Step-by-step explanation:

16 cm, 30 cm, 45 cm

if you want to draw a triangle with these sides you would add

16 + 30 = 46

the longest side would have to be greater then the other 2 sides

Answer:

x=2

Step-by-step explanation:

12x-8=16

12x=24

x=2

Answer:

x =-4

Step-by-step explanation:

3x − 7 = −19

Add 7 to each side

3x − 7+7 = −19+7

3x = -12

Divide by 3

3x/3 = -12/3

x =-4

Answer: C

The line crosses 1 on the y-axis which mean the equation is y = 0.3x + 1

[tex]x + 85 + x + 64 + 45 = 180°[/tex]

[tex](x + x) + (85 + 64 + 45)= 180[/tex]

[tex]2x + 194= 180[/tex]

[tex]2x = 180 - 194[/tex]

[tex]2x = - 14[/tex]

[tex]x = \frac{ - 14}{ \: \: \: \: 2} [/tex]

[tex]x = - 7[/tex]

[tex]∴ \: the \: value \: of \: x \: = - 7[/tex]

Answer:

33.75 ounces

hope this helps

Answer:

Step-by-step explanation:

First part:

Second part:

I hope this helps!