All categories

3 years ago

Letter d is 7 someone help me please!!!!

Mathematics

2 answers:

sleet_krkn [62]3 years ago

7 0

Answer:

A -7

Step-by-step explanation:

the angles of a triangle add up to 180

76+41+70 = 187-7 180

Dafna11 [192]3 years ago

3 0

Answer:

The answer is A. -7

Step-by-step explanation:

76 + 41 = 117

117 + 70 = 187

187- 7 = 180

Hope this helps

You might be interested in

What is the GPA for 88.69% 87.15% 75.35% 67.78% 63.14% 51.44%?<br> i just want to know.

lorasvet [3.4K]

The GPA for the following on the scale of 4 GPA are; 88.69% -3.3, 87.15% - 3.3, 75.35% - 2.0 , 67.78% - 1.3, 63.14% - 1.0, 51.44% - 0.0

The Term GPA is a combined GPA or grade point average of all grades you have earned in a semester or term.

The Cumulative GPA is the overall GPA or grade point average of all cumulative GPA's that are earned in all semesters and all the courses in an academic term.

The GPA is total of averaged per semester; while the cumulative GPA is the total of all grades for all semesters That is; the difference between GPA and cumulative GPA.

The GPA for the following on the scale of 4 GPA are;

88.69% -3.3

87.15% - 3.3

75.35% - 2.0

67.78% - 1.3

63.14% - 1.0

51.44% - 0.0

Learn more about the GPA here;

brainly.com/question/1238928

#SPJ1

7 0

2 years ago

Match the parabolas represented by the equations with their foci.

Elenna [48]

Function 1 $f(x)=- x^{2} +4x+8$

First step: Finding when $f(x)$ is minimum/maximum
The function has a negative value $x^{2}$ hence the $f(x)$ has a maximum value which happens when $x=- \frac{b}{2a}=- \frac{4}{(2)(1)}=2$ . The foci of this parabola lies on $x=2$ .

Second step: Find the value of y-coordinate by substituting $x=2$ into $f(x)$ which give $y=- (2)^{2} +4(2)+8=12$

Third step: Find the distance of the foci from the y-coordinate
$y=- x^{2} +4x+8$ - Multiply all term by -1 to get a positive $x^{2}$
$-y= x^{2} -4x-8$ - then manipulate the constant of y to get a multiply of 4
$4(- \frac{1}{4})y= x^{2} -4x-8$
So the distance of focus is 0.25 to the south of y-coordinates of the maximum, which is $12- \frac{1}{4}=11.75$

Hence the coordinate of the foci is (2, 11.75)

Function 2: $f(x)= 2x^{2}+16x+18$

The function has a positive $x^{2}$ so it has a minimum

First step - $x=- \frac{b}{2a}=- \frac{16}{(2)(2)}=-4$
Second step - $y=2(-4)^{2}+16(-4)+18=-14$
Third step - Manipulating $f(x)$ to leave $x^{2}$ with constant of 1
$y=2 x^{2} +16x+18$ - Divide all terms by 2
$\frac{1}{2}y= x^{2} +8x+9$ - Manipulate the constant of y to get a multiply of 4
$4( \frac{1}{8}y= x^{2} +8x+9$

So the distance of focus from y-coordinate is $\frac{1}{8}$ to the north of $y=-14$
Hence the coordinate of foci is (-4, -14+0.125) = (-4, -13.875)

Function 3: $f(x)=-2 x^{2} +5x+14$

First step: the function's maximum value happens when $x=- \frac{b}{2a}=- \frac{5}{(-2)(2)}= \frac{5}{4}=1.25$
Second step: $y=-2(1.25)^{2}+5(1.25)+14=17.125$
Third step: Manipulating $f(x)$
$y=-2 x^{2} +5x+14$ - Divide all terms by -2
$-2y= x^{2} -2.5x-7$ - Manipulate coefficient of y to get a multiply of 4
$4(- \frac{1}{8})y= x^{2} -2.5x-7$
So the distance of the foci from the y-coordinate is - $\frac{1}{8}$ south to y-coordinate

Hence the coordinate of foci is (1.25, 17)

Function 4: following the steps above, the maximum value is when $x=8.5$ and $y=79.25$ . The distance from y-coordinate is 0.25 to the south of y-coordinate, hence the coordinate of foci is (8.5, 79.25-0.25)=(8.5,79)

Function 5: the minimum value of the function is when $x=-2.75$ and $y=-10.125$ . Manipulating coefficient of y, the distance of foci from y-coordinate is $\frac{1}{8}$ to the north. Hence the coordinate of the foci is (-2.75, -10.125+0.125)=(-2.75, -10)

Function 6: The maximum value happens when $x=1.5$ and $y=9.5$ . The distance of the foci from the y-coordinate is $\frac{1}{8}$ to the south. Hence the coordinate of foci is (1.5, 9.5-0.125)=(1.5, 9.375)

8 0

3 years ago

In a given amount of time , Nijah drove twice as far as Jared. Altogether they drove 135 miles. Find the number of miles driven

Alexandra [31]

2x + x = 135
3x = 135
x = 135 /3
x = 45

Nijah = 2*45 = 90 miles

8 0

3 years ago

Please explain the steps to answer this<br> 2|6y-4|-3=7

dem82 [27]

First you need to do the distributive property
2|6y-4|-3=7
12y +8 -3 =7 then you combine like terms
12y + 5 =7 then you subtract 5 from 7
12y=2 then divide by 12
y=0.17 or 1/6 <--- that's your answer

8 0

3 years ago

$17 is what percent of $17?

maxonik [38]

Its 100%, 17/17 • 100 = 100%.

Hope this helps.

4 0

3 years ago

Read 2 more answers