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navik [9.2K]
4 years ago
15

Express (5r+2)(5r-2) in standard polynomial form

Mathematics
1 answer:
Alex_Xolod [135]4 years ago
8 0
25r^2-4 rewriten in standard polynomial form

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Are my answers correct?
Kay [80]

Answer:

They are correct

Step-by-step explanation:

And I have to put an explanation bc my other account got blocked bc of all this

4 0
3 years ago
What is the value of x?
natima [27]

Answer:

30°

Step-by-step explanation:

A triangle always adds up to 180° so since one side of the triangle is already 90°, that means the other two sides add up to be 90° as well.

x + 2x = 90 \\ 3x = 90 \\  \frac{3x}{3}  =  \frac{90}{3}  \\ x = 30

6 0
2 years ago
Bill began his diet when he weighed 268 pounds. After 4 weeks he weighed 250 pounds. Write an equation in slope-intercept form o
Alika [10]

An equation in slope-intercept form of the line

p=-\frac{9}{2}w+268\\

Given :

Bill began his diet when he weighed 268 pounds.

After 4 weeks he weighed 250 pounds

Lets 'w' represents weeks and 'p' represents pounds

Using the given information ,we find two points (w,p)

Bill began his diet when he weighed 268 pounds.

when w=0 , weight in pounds =268

(0,268)

After 4 weeks he weighed 250 pounds, so point is (4,250)

Use two points to write the equation of line

Slope intercept form is y=mx+b

where m is the slope and b is the y intercept

slope formula using 2 points (0,268) and (4,250)

m=\frac{y_2-y_1}{x_2-x_1} =\frac{250-268}{4-0} =-\frac{9}{2}

now use slope m and any one point (0,268) to write equation

y=mx+b\\y=-\frac{9}{2}x+b\\(0,268) where x=0  and y=268\\268=-\frac{9}{2}(0)+b\\\\b=268

we know that w represents weeks and p represents pounds

The equation of the line in slope intercept form is

p=-\frac{9}{2}w+268\\

Learn more :  brainly.com/question/986503

7 0
3 years ago
Choose the explanation that shows why ΔADE is similar to ΔABC.
Natasha2012 [34]

Recall that a dilation with center (0, 0) and scale factor k maps (x,y) onto (kx, ky).

Now, triangle ADE is formed by

A=(0,0),\quad D=(0,2),\quad E=(4,0)

Whereas triangle ABC is formed by

A=(0,0),\quad B=(0,4),\quad C=(8,0)

In other words, the coordinates of B and C can be obtained by multiplying by 2 the coordinates of D and E.

This means that you get ABC from ADE by dilating with center (0,0) and scale factor 2.

5 0
3 years ago
Read 2 more answers
Are these ratios equivalent?<br> 2:4 and 6:16
Grace [21]

Answer:

no

Step-by-step explanation:

2:4 is 1:2, 6:16 is not one half

4 0
3 years ago
Read 2 more answers
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