Mathematics High School

Help me please!! This is timed and I’m stuck

Help Me Please!! This Is Timed And Im Stuck

Answers

Answer 1

Let's solve

[tex]\\ \sf\longmapsto 2x^2+7x-15=0[/tex]

[tex]\\ \sf\longmapsto x=\dfrac{-7\pm\sqrt{7^2-4(2)(-15)}}{2(2)}[/tex]

[tex]\\ \sf\longmapsto x=\dfrac{-7\pm\sqrt{169}}{4}[/tex]

[tex]\\ \sf\longmapsto x=\dfrac{-7\pm13}{4}[/tex]

[tex]\\ \sf\longmapsto x=\dfrac{-7+13}{4}\:or \:\dfrac{-7-13}{4}[/tex]

[tex]\\ \sf\longmapsto x=\dfrac{6}{4}\:or\:\dfrac{-20}{4}[/tex]

[tex]\\ \sf\longmapsto x=\dfrac{3}{2}\:or -5[/tex]

Subtract

[tex]\\ \sf\longmapsto 3/2-(-5)=3/2+5=13/2[/tex]

Option B

Answer 2

Answer:

Option (B.)

Step-by-step explanation:

Answer in the picture.hu

Help Me Please!! This Is Timed And Im Stuck
Help Me Please!! This Is Timed And Im Stuck
Help Me Please!! This Is Timed And Im Stuck
Help Me Please!! This Is Timed And Im Stuck

Related Questions

The formula d=rt gives the distance traveled in time t at rate r. A delivery truck drives for 1.5 hours and travels 76 miles.
What is the average speed of the truck?
A. 38 miles per hour
B. 50.7 miles per hour
C. 74.5 miles per hour
D. 114 per hour.
Please help fast, this test is already late and I'm super stuck. Thanks!

Answers

Answer:

50.7 miles per hour

Step-by-step explanation:

I ve seen this question before

need help with this math question

Answers

Answer:

please resend question

Step-by-step explanation:

Evaluate. 84
A.65,536
B. 4096
C. 512
D.32
PLZZZZZZ HELP and rate my rovlox fit
​

Answers

Answer:

its 32

Step-by-step explanation:

The value of the expression is 55/3.

What is an expression?

An expression contains one or more terms with addition, subtraction, multiplication, and division.

We always combine the like terms in an expression when we simplify.

We also keep all the like terms on one side of the expression if we are dealing with two sides of an expression.

Example:

1 + 3x + 4y = 7 is an expression.

3 + 4 is an expression.

2 x 4 + 6 x 7 – 9 is an expression.

33 + 77 – 88 is an expression.

We have,

84 ÷ 42 x 6 + 18

Using the PEMDAS rule.

84 ÷ 252 + 18

84/252 + 18

1/3 + 18

(1 + 54)/3

= 55/3

Thus,

The value of the expression is 55/3.

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ2

The complete question:

84 ÷ 42 x 6 + 18

Solve the expression.

can someone please help me!! this assignment is due at 11:59 I need this done

Answers

Answer:

Step-by-step explanation:

Tan (theta) = opposite / adjacent

theta = 60 degrees

opposite = 15

adjacent = opposite / Tan(theta)

adjacent = 15 / tan(60)

tan(60) = sqrt(3)

sqrt(3) =  1.732

adjacent = 15 /1.732

answer: adjacent = 8.6603

4x+8=3
help asap
step by step please

Answers

[tex]4x +8 =3\\\\\implies 4x = - 5 \\\\\implies x = - \dfrac 54[/tex]

Answer:

x= -5/4

Step-by-step explanation:

4x+8=3

4x=3-8

4x=-5

x= -5/4

What is x in : f(x)=7?

Answers

I think the answer would be "X=1"

(Sorry if I'm wrong)

Which set of ordered pairs represents a function?
A. {(0,5), (2,5),(4,5), (6,5), (8,5)}
B. {(3, 1), (3, 2), (3, 3), (3, 4), (3,5)}
C. {(2,3), (3, 4), (4,3), (3, 2), (2, 1)}
D. {(1, 4), (2, 4), (3, 4), (4, 3), (4, 2)}

Answers

I bet its c coukd be wrong tho good luc

plsss helppp
can you pls do this?
​

Answers

568 and 836 hope that helps I don’t really know

There are 199 green marbles and 199 red marbles in a bag. How many marbles must be chosen to be certain we have the following. Four red or three green?

Answers

Answer:

203 for four red and 202 for three green.

Step-by-step explanation:

Consider the worst possible choice. If you want four red then imagine the worst possible case. That'd be picking all 199 marbles before any red, and after you pick all 199 green marbles you still need four red, and 199+4=203. For green, do the same thing and you get 199+3=202

There are 203 for four red and 202 for three green.

Given that,

There are 199 green marbles and 199 red marbles in a bag.

Based on the above information, the calculation is as follows:

Since there is 4 red or three green.

So,

We can solve like

= 199 + 3

= 202

And,

= 199 + 4

= 203

Therefore we can conclude that there are 203 for four red and 202 for three green.

Learn more: brainly.com/question/16115373

pls help asap MIDSEGMENTS

Answers

Answer:

RT and KS

Step-by-step explanation:

isosceles triangle

Select all the equations that are true when x = 6.
6x = 12
17 – x = 11
x ÷ 2 = 3
19 ÷ 3 = x
5 + x = 11

Answers

Answer:

everything but the 4th are true

Step-by-step explanation:

fax

Answer:

B,C,E

Step-by-step explanation:

What is the area of this tile

Answers

ANSWER: 4in^2
Explanation: 4x1=4

Answer:

4in^2

Step-by-step explanation:

1x4=4 and then ^2 because it's square inches

help please with math i beg you​

Answers

a) x=24b+8v

4 * 24 = 96

120 - 96 = 24

24 / 8 = 3

b) 3

6 * 8 = 48

120 - 48 = 72

72 / 24 = 3

c) 3

120 / 8 = 15

d) 15

120 / 24 = 5

e) 5

Add (8y - 2x) + (-4y - 3x)

A. 4y - 5x
B. -4y - x
C. -4y - 5x
D. -32y + 6x

Answers

Answer:

its none of these its -6x + 4y

Step-by-step explanation:

Answer:

A. 4y - 5x

Step-by-step explanation:

8y - 4y = 4y

-2x -3x = -5x

I hope this helps!

Find the perimeter. Simplify the answer.

Answers

Answer:

21u-26

Step-by-step explanation:

add all the side lengths together: 7u + 3u -10 + 6u - 8 + 5u - 8 = (7 + 3 + 6 + 5)u + (-10 -8 -8) = 21u - 26

Please help homework due tomorrow!!

12. Ms. Kerr needs $450 to purchase new volleyballs. She has already saved 65% of the money, how much
additional money does she need to save to have enough to purchase the equipment?

13. A 6th grade student is 5 feet tall and casts a 12 foot shadow. How tall is the 8th grader standing next to
him that casts a 14.4 foot shadow?

Answers

Answer:

12-157.5  13-6ft

Step-by-step explanation:

the first one just look up 65% of 450 and minus the number you get by 450

the second one do the butterfly method

[tex]\frac{5}{12} \frac{x}{14.4} \\[/tex]

the heights on top and shadows on bottom

12x=72

x=6

Is this answer right?

Answers

Answer:

that is the correct answer.

Step-by-step explanation:

The perimeter of a triangle is 7a-11b . If two of its sides are 2a+b and a-9b, what is the third side?

Answers

Answer:

4a plus or minus 1b

Step-by-step explanation:

Find the average rate of change between x=2 and x=4 for the function. F(x)=3x^3-1

Answers

Answer:

84

Step-by-step explanation:

Average rate of change between x = 2 and x = 4 is:

[f(4) - f(2)]/(4 - 2) = (3*4³ - 1 - 3*2³ + 1)/2 = 168/2 = 84

[tex]\boxed{\sf Average\: change=\dfrac{f(a)-f(b)}{a-b}}[/tex]

[tex]\\ \sf\longmapsto f(x)=3x^3-1[/tex]

[tex]\\ \sf\longmapsto f(4)=3(4)^3-1=3(64)-1=192-1=191[/tex]

[tex]\\ \sf\longmapsto f(2)=3(2)^3-1=3(8)-1=24-1=23[/tex]

Average change

[tex]\\ \sf\longmapsto \dfrac{192-23}{4-2}[/tex]

[tex]\\ \sf\longmapsto \dfrac{168}{2}[/tex]

[tex]\\ \sf\longmapsto 84[/tex]

100 POINTS IF U GET THIS RIGHT!

Answers

Answer:

The Slope equals (-8/7)

C = 5/9 (F − 32)


The equation above gives the Celsius temperature, C, corresponding to the Fahrenheit temperature, F. Find the Celsius temperature equivalent to 77° F.


A. 25° C

B. 57° C

C. 45° C

D. 30° C

Answers

the answer is the first one 25
C I think, because the answer I got was 40

Evaluate. 12⋅(1/4+1/3)2+2/3 enter your answer as a mixed number

Answers

Answer:

14 2/3

Step-by-step explanation:

i took the test

102 > 6x + 3 ( 4- 8x )

Answers

Answer:

x > - 5

Step-by-step explanation:

[tex]102 > 6x + 3 (4-8x) \\\rule{150}{0.5}\\102>6x+ 12-24x\\\\102>6x-24x + 12\\\\102>-18x + 12\\\\102 - 12 > -18x + 12 - 12\\\\90 > -18x\\\\\frac{90>-18x}{-18}\\\\-5 < x\\\\\boxed{x > -5}[/tex]

Hope this helps you.

I need help surface area

Answers

Answer:

[tex]\huge\boxed{318yd^2}[/tex]

Step-by-step explanation:

The object shown in the diagram is a triangular prism, which contains two triangular sides and three rectangular sides.

The area of a triangle is simply [tex]\frac{bh}{2}[/tex].

Because the triangles are both the same, you may multiply the equation by 2 to get simply bh, or 9 * 6, or 54.  

Then, simply solve for the areas of each rectangle:

r1 = 11 * 7 = 77

r2 = 11 * 8 = 88

r3 = 11 * 9 = 99.

Then, simply add all the values to get:

99 + 88 + 77 + 54

318.

Hope it helps :) and let me know if you want me to elaborate.

help loll i need an 100

Answers

Answer:

-4 (as - and + = -)

Step-by-step explanation:

If you like my answer than please mark me brainliest thanks

A 135-page notebook has 33 writing lines on each page. What is the total number of writing lines in the entire notebook

Answers

Answer:

4455

Step-by-step explanation:

135 pages x 33 lines a page = 4455 lines.

Solve for y.

y − 25 = 11

y =

Answers

ANSWER :

y - 25 = 11

y = 25 + 11

y = 36

Answer:

y = 36

Step-by-step explanation:

y - 25 = 11y = 11 + 25y = 36

does the point (7 5) satisfy the equation y = x + -2

Answers

Answer:

Yes

Step-by-step explanation:

7 = x

5 = y

5 = X + - 2

5 = X - 2

If X is 7 then

5 = 7-2

5=5

yes

in the equation 3(x-1)=2x+c for what value of c will x=3? explain your reasoning.

Answers

Answer:

0

Step-by-step explanation:

if x is 3 then;

3(3-1)=2×3+c

c=0

so if c=0 then

x=3

Evaluate the expression below when a = 5 and b = 2: a (10b - 2a).

Answers

100-50 (not too sure)
Explanation:
5(10(2)-2(5))
5(20-10)
100-50

Answer:

50

Step-by-step explanation:

First, substitute the 2 given values into the expression.

a ( 10b - 2a )

5 ( 10(2) - 2(5) )

Simplify to the lowest terms possible, without distributing.

5(20-10)

Distribute 5 into each term.

100-50 or 20(5)-10(5)

=50

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