7th grade math help me plzzzz

Answer:

I hope this helps!

Step-by-step explanation:

Answer:4.5

Step-by-step explanation:

Answer:

Absolute value means any value but always positive. So |-4.5|=4.5

Answer:

1. A.

2. B.

3. C.

4. A.

Hope this helped!

Answer:

the measure of angle is m(<a)=40

Step-by-step explanation:

the intirior angles of all triangles add up to 180

with this you can subtract the 90 degree angle and the 50 degree angle from the total of 180 degrees.

180

90

-50

---------

=40 degreese

hoped this helped.

Step-by-step explanation:

a+50+90=180°(being sum of angle of right angled▲)

or, a+140= 180°

or, a=180°_ 140°

Therefore, a=40°

Based on the data provided and using logical reasoning, Mr Smith has seven children, four sons and three daughters.

Logical reasoning means using critical thinking skills to provide solutions to given problems.

The number of children Mr. Smith has can be determined by using the skill of logical reasoning.

Assuming that son has two brothers, then he also has two sisters.

Each sister has one sister and three brothers.

This scenario does not satisfy the conditions.

Assuming that son has three brothers, then he also has three sisters.

Each sister has two sisters and four brothers.

Therefore, Mr Smith has seven children, four sons and three daughters.

Learn more about logical reasoning at: https://brainly.com/question/14458200

y = sec(x) has a range of f(x) ≤ -1 and f(x) ≥ 1

Thus does not include zero in the range scale.

Extra's:

y = cos(x) has a range of -1 ≤ f(x) ≤ 1

y = cot(x) has infinity range

y = tan(x) has infinity range.

Answer:

sec x

Step-by-step explanation:

Let's set each function equal to zero to see if they have zero in their function.

If there is no solution, then we no solution of zero.

[tex] \cos(x) = 0[/tex]

[tex]x = \frac{\pi}{2} + 2\pi(n)[/tex]

So there is a solution of zero.

[tex] \cot(x) = 0[/tex]

[tex] \frac{ \cos(x) }{ \sin(x) } = 0[/tex]

There answer here is

[tex]x = \frac{\pi}{2} + 2\pi(n)[/tex]

So there is a solution. of zero here

If cot x=0, has a solution of zero, then tan x does as well. Since we can use

[tex] \frac{ \sin(x) }{ \cos(x) } = \tan(x) [/tex]

[tex] \frac{ \sin(x) }{ \cos(x) } = 0[/tex]

The answer here will be

[tex]0 + 2\pi(n)[/tex]

So that leaves sec x.

Proof:

[tex] \sec(x) = \frac{1}{ \cos(x) } [/tex]

1 divided by any number won't equal zero, so the solution will never be 0.

Answer: x=7

Step-by-step explanation:

Answer:

fred has 32 and jason has 48

Step-by-step explanation:

32+16=48

Answer:

25

Step-by-step explanation:

Since y= 60 when x=240 it would be 0.25 and 0.25 x100 would be 25

Complete Question

The complete question is shown on the first uploaded image

Answer:

The correct option is  C

Step-by-step explanation:

From the question we are told that

  The population mean is p =  64

  The sample size is  n =  56

   The sample mean is  [tex]\=  x  =  64.79[/tex]

  The standard deviation is  [tex]s = 2.77[/tex]

    The null hypothesis is  [tex]H_o :  \mu =  64[/tex]

    The alternative hypothesis is  [tex]H_a :  \mu > 64[/tex]

    The test statistics [tex]t =  2.13[/tex]

    The level of significance is  [tex]\alpha  = 0.05[/tex]

    The p-value  is  [tex]0.01 <  p-value <  0.025[/tex]

Given that the  [tex]p-value  <  \alpha[/tex] we reject the null hypothesis

Answer:

16 gallons

Step-by-step explanation:

Since 4 quarts is equal to a gallon, you should divide 64 quarts by 4 to get 16 gallons

Answer:

Containing in one gallon, there is 4 quarts.

I like to order my units preferably so I can understand better;

QUARTS           4     (x16)   64

________ = ______ = ______ so x = 16

GALLONS          1     (x16)     x

Answer:

X=4

Step-by-step explanation:

2(4)-1=7

8-1=7

7=7

Answer:

9/10

Step-by-step explanation:

8.6-4x2+3/10- multiply first 4x2=8

8.6-8+3/10 - subtract 8.6-8+.6

.6+3/10= 9/10

Answer:

2k + 8 = 0

2k + 8 - 8 = 0 - 8

2k = - 8

2k/2 = - 8/2

k = - 4

Step-by-step explanation:

you gotta put the 8 on the other side by subtracting and the divide both sides to get k

Answer:

k = -4

Step-by-step explanation:

2k + 8 = 0

Subtract 8 from both sides.

2k = -8

Divide both sides by 2.

k = -4

Answer:

yes

Step-by-step explanation:

Acute isosceles triangle.

Sides: a = 9   b = 9   c = 4

Area: T = 17.55

Perimeter: p = 22

Answer:

He is correct.

Step-by-step explanation:

Answer:

C. 72

Step-by-step explanation:

The whole angle measures 106 degrees as mentioned on top and we know that angle HFG is 34 degrees because it says so in that angle. Just do this: 106-34. The answer is 72. We subtract because we're finding the remaining/missing number in this problem. If you want to check if your answer is correct, you can add 72 and 34.

Another way you could do this is by just adding each option with 34 to see if you get a total of 106.

20000

[tex](4000-2000)\div10\ percent[/tex]

Calculate

[tex]\frac{4000-2000}{0.1}[/tex]

Calculate the sum or difference

[tex]\frac{2000}{0.1}[/tex]

Multiply both the numerator and denominator with the same integer

[tex]\frac{20000}{1}[/tex]

Any fraction with a denominator of 1 is equal to its numerator

[tex]20000[/tex]

I hope this helps you

:)

Step-by-step explanation:

his salary =$2000

his commission should be (to make a total of $4000/month )=$4000-$2000 =$2000

let he should sell x amount over $7000 to get $2000 commission

So,   7% of x = 2000

             7x/100 = 2000

               x= (2000*100)/7 =28571.43 approx

As he will get commission on sales over $ 7000,so his should sell in a month

                             =$7000+$28571.43

                             = $ 35571.43

A'=(10,2)

B'=(8,-4)

C'=(4,-2)

To rotate a point 90° clockwise about the origin,

The new coordinates become (y,-x)

So the first one was A(-2,10)

x=-2 & y=10

The new coordinates become A'(y,-x)

So y=10 and -x=-(-2)=2

A'(10,2)

Answer:

A' =(2,4)

B'=(8,2)

C′=(6,-2)

Answer:

y = 5

x = 0

Step-by-step explanation:

soo i think elimination was this:

    so first lets make -x = 3x

so we multiply -3 to the whole equation

3x + 3y = 15

now we eliminate (i think this is elimination)

    3x + 5y = 25

   -

    3x + 3y = 15

----------------------------

     0 + 2y = 10

2y = 10

y = 5

now substitute to one of the original equations

3x + 5(5) = 25

3x + 25 = 25

3x = 0

x = 0

now lets check

-0 -5 = -5?

-5 = -5

Answer:

No fixed entry fee

If no of persons be x

The expression is

Verification:-

Hence verified

Answer:

Let f be the number of friends

Let c be the cost of the party

As (f) is the independent variable, the number of friends will be along the x-axis.

As (c) is the dependent variable, the cost of the party will be along the y-axis.

If the cost of the party is $20 per person, then the equation to represent the relationship is:

c = 20 f

**see attached graph complete with plotted points**

Answer:

P = 28.66 ft

Step-by-step explanation:

So perimeter of half circle

= 2π × 6/2

= 2π × 4/2

= 8π ft/2

= 4 π

Total Perimeter = 6 ft + 8π/2 ft + 10 ft +

= 6 ft + 4 π ft + 10 ft

= 28.666 ft

Total Perimeter = 28.66 ft

PLEASE MARK ME AS BRAINLIEST AND HAVE A NICE DAY

Answer:

28.56

Step-by-step explanation:

The sides of the triangles are already given, so that will be 16. The diameter of the circle is given to be 8, so the radius will be half of it, 4. The circumference of a circle 2πr, so the circumference is 8π. we need to divide this by two because it is a semicircle, so the circumference of the semicircle is 4π. The answer should be 16+4π, and we can substitute in 3.14 for π to get 12.56+16=28.56

Hope this helps!

Answer:

[tex]1. \frac{4}{3}[/tex]

[tex]2.\frac{1}{3}[/tex]

Step-by-step explanation:

To find the scale factors, you find the length of one side from the image, and divide it by the length of the similar side in the image.

So, for #1, the image side is 8 units, and the pre-image is 6.

8/6 = 4/3

For #2, the image is  3 units, and the pre-image is 9 units.

3/9 = 1/3

Answer:

every other roll should make u lose $3

Answer:

4.8

Step-by-step explanation:

Firstly, you take the ratio 12d/30t(d=dollars, t=tokens). And you switch it to (unknown)d/30t. And if you execute the formula(12 * 12 / 30) you get 4.8.

hope i helped

Answer:

R

Step-by-step explanation:

collinear points lie on the same line

R is on the line joining AB

Answer:

ight combine like terms so you get x-13=-5 then you add 13 which gives you x=8

Step-by-step explanation:

Answer:

8

Step-by-step explanation:

because 8-3-10 is equal to -5