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gizmo_the_mogwai [7]
3 years ago
12

Solve: Factor the following polynomial completely -9x^2-30x-25

Mathematics
2 answers:
AnnZ [28]3 years ago
5 0

Answer:-(3x+5)^2

Step-by-step explanation:

Korolek [52]3 years ago
3 0

Answer:

(−3x−5)(3x+5)

Step-by-step explanation:

−9x2−30x−25

−9x2−30x−25

=(−3x−5)(3x+5)

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Pete borrowed $400 for 1 year. He paid back a total of $440. What was the interest rate per year?
OleMash [197]

I=PRT/100

1. Make R (rate) subject

R/100= I/PT

2. Substitute and calculate

r/100= i/pt

r/100= 40/400 × 1

(<em>4</em><em>0</em><em> </em><em>i</em><em>s</em><em> </em>from 440-400.<em>T</em><em>h</em><em>e</em><em> </em><em>i</em><em>n</em><em>t</em><em>e</em><em>r</em><em>e</em><em>s</em><em>t</em>)

r/100= 0.1

r/100×100= 0.1×100

r=10% (interest rate per year)

To confirm

I=PRT

I= 400×10/100×1

I= $40 (Interest)

5 0
3 years ago
Read 2 more answers
for every girl taking classes at the martial arts schools there are 3 boys who are taking classes at the school. if there are 23
Yuliya22 [10]

You have to be very careful how you set this up. For every girl (who counts as 1) there are 3 boys (who count as 3). The total number in the proportion is 3 + 1 =4. You are given a total, but that is both boys and girls. That's why you need the 4.

3/4 = x / 236 Cross multiply

4x = 3 * 236

4x = 708 Divide by 4

x = 708/4

x = 177

There are 177 boys at the school and 236 - 177 = 59 girls.

3 0
2 years ago
5x - 4y = 0 in point intercept form
Contact [7]

Answer:

in slope-intercept form y = 5/4x in y-intercept form is b = 0. try to use math___way dot com

Step-by-step explanation:

6 0
3 years ago
If is parallel to , which statement must be true?
Igoryamba
I’m pretty sure it’s d
6 0
3 years ago
Find the surface area of the composite solid.
natulia [17]

Answer:

<h2>         1240.4 mm²</h2>

Step-by-step explanation:

440.4 + 5\cdot(\frac12\cdot16\cdot20)=440.4+800=1240.4\ mm^2

4 0
3 years ago
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