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4 years ago

Pls help me guys! This is super hard

Mathematics

2 answers:

nadya68 [22]4 years ago

7 0

B is the answer to the question

Reil [10]4 years ago

4 0

Number 27 is A. The goal is to save $500 and he already has $128 so add x amount and he'll have $500. Subtract $128 from $500 to find x.

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The three trapezoids have the same base lengths, but different angle measures. Which trapezoid has the greatest area? Explain.

Firlakuza [10]

Well the formula for the area of a trapezoid is as follows:

A= $\frac{a+b}{2} h$

where a and b are both base measures (a trapezoid has a top and bottom base).

Therefore, if all three have the same base length (the top and bottom lengths themselves being different yet the same on all three), the trapezoid with the greatest angle measure would have the greatest are. This is because with a greater angle measure comes a greater height (Pythagorean theorem).

5 0

3 years ago

The area of a rectangle is 56 meters. the lengthe th is 2 cm moran x and the width is 5 cm less than twice x. solve for x

olya-2409 [2.1K]

You can write the dimensions of the rectangle as (x + 2) and (x - 5), and because the area is base × height, you can multiply the brackets together and make it equal to 56:

(x + 2)(2x - 5) = 56
2x² + 4x - 5x - 10 = 56
x² - x - 10 = 56

Now because you have an x², you need to make the equation equal to 0 so you can factorise, so:

2x² - x - 10 = 56
- 56
2x² - x - 66 = 0
(x - 6)(2x + 11)

So x is 6, because the other option is -5.5 and you cannot have a negative length.

I hope this helps!

8 0

3 years ago

Read 2 more answers

5x + y = 11 3x - y =9 What is the value of x and y

tatiyna

Answer:

x=2.5 ; y=-1.5

Step-by-step explanation:

Explaination in picture

6 0

3 years ago

Read 2 more answers

Rewrite the function in standard form, intercept form, find the vertex, find the y-intercept, and find the x-intercepts.

jasenka [17]

Answer:

We have the function, $f(x)=(x+3)^{2}-4$

On simplifying, we get,

$f(x)=x^2+6x+9-4$

i.e. $f(x)=x^2+6x+5$

Thus, the standard form of the function is $f(x)=x^2+6x+5$ .

Now, the factors of the given functions are (x+1) and (x+5).

Since, the intercept form of the function is the factored form of the function.

So, we have, intercept form of the function is $f(x)=(x+1)(x+5)$ .

Now, we know that,

Value of x-coordinate of the vertex is $\frac{-b}{2a}$ i.e. $\frac{-6}{2\times 1}$ i.e. $\frac{-6}{2}$ i.e. x= -3

Then, $f(-3)=(-3)^2+6\times (-3)+5$ i.e. $f(-3)=9-18+5$ i.e. f(-3)=-4

So, the vertex of the function is (-3,-4).

Further, we know that, 'the y-intercept of a function is the point where the function crosses y-axis'.

So, when x=0, we have, $f(0)=0^2+6\times 0+5$ i.e. f(0) = 5

Thus, the y-intercept is (0,5)

Also, 'the x-intercept of a function is the point where the function crossese x-axis'.

Then, for f(x)=0, we have $0=x^2+6x+5$ i.e. $0=(x+1)(x+5)$ i.e. x= -1 and x= -5

Thus, the x-intercept are (-1,0) and (-5,0).

8 0

3 years ago

Josef worked 15.35 hours one week and 32.7 hours the next week. how many hours did josef work over the two weeks?

dem82 [27]

In order to calculate, the time of his total work, you need to add them,
It would be: 15.35 + 32.7 = 48.05

In short, Your Answer would be 48.05 hours

Hope this helps!

3 0

3 years ago

Read 2 more answers