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Aleks [24]
3 years ago
7

A garden has 15 rose bushes. If each bush has 8-12 roses, about how many roses are there?

Mathematics
1 answer:
Harlamova29_29 [7]3 years ago
3 0

Answer: D. 150 roses

Step-by-step explanation: Just multiply 15 times 10

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Plz find x and y WILL GIVE BRAINLIEST!!!!!!
Elina [12.6K]

Answer:

x=-2 and y=2

Step-by-step explanation:

Do simultaneous equations

-8x + 4y = 24 <em>(multiply everything in the equation by -7)</em>

-7x + 7y = 28 <em>(multiply everything in the equation by 8)</em>

56x - 28y  = -168

-56x + 56y = 224

<em>(add equations, ie add 'x' parts, 'y' parts, and numerical parts)</em>

<em> </em>28y = 56

∴y = 2

-8x + 4y = 24

-8x + 4(2) = 24

-8x = 16

∴x=-2

Lemme know if you have questions :D

8 0
3 years ago
WILL GIVE THE BRAINLIEST ANSWER TO THE CORRECT ANSWER!!!!!!! Solve the problem shown in the picture.
Marina86 [1]
Excuse the handwriting.

3 0
3 years ago
A liquid has a oh of 7.4, find the hydrogen ion concentration [H+]?
Radda [10]
<span>pHProblem 4- Determine the hydrogen concentration of bloodTutorial to help you with this calculation.<span>4.What is the approximate hydrogen ion concentration of blood with pH 7.4?</span><span> <span><span>TutorialIn this problem we are given pH and asked to solve for the hydrogen ion concentration. Using the equation, pH = − log [H+] , we can solve for [H+] as,− pH = log [H+] ,[H+] = 10−pH,by exponentiating both sides with base 10 to "undo" the common logarithm. The hydrogen ion concentration of blood with pH 7.4 is,[H+] = 10−7.4 ≈ 0.0000040 = 4.0 × 10−8 M. </span></span></span></span>
8 0
3 years ago
Un triángulo rectángulo tiene un área de 84 pies2 y una hipotenusa de 25 pies de largo. ¿Cuáles son las longitudes de sus otros
jolli1 [7]

Answer:

7 feet and 24 feet

Step-by-step explanation:

In the right triangle, the hypotenuse is 25 feet long. The area of this triangle is 84 square feet.

Let x feet and y feet be the lengths of triangle's legs.

By the Pythagorean theorem,

x^2+y^2=25^2\\ \\x^2+y^2=625

The area of the right triangle is half the product of its legs, thus

84=\dfrac{1}{2}xy\\ \\xy=168

Solve the system of two equations:

\left\{\begin{array}{l}x^2+y^2=625\\ \\xy=168\end{array}\right.

From the second equation:

x=\dfrac{168}{y}

Substitute it into the first equation:

\left(\dfrac{168}{y}\right)^2+y^2=625\\ \\168^2+y^4=625y^2\\ \\y^4-625y^2+168^2=0\\ \\D=(-625)^2-4\cdot 168^2=(625-2\cdot 168)(625+2\cdot 168)=289\cdot 961=17^2\cdot 31\\ \\\sqrt{D}=17\cdot 31=527\\ \\y^2_{1,2}=\dfrac{-(-625)\pm 527}{2}=49,\ 576\\ \\y_1=7,\ y_2=-7,\ y_3=24,\ y_4=-24

The length of the leg cannot be negative, so

y_1=7\Rightarrow x_1=\dfrac{168}{7}=24\\ \\y_2=24\Rightarrow x_2=\dfrac{168}{24}=7

6 0
3 years ago
Hiii :) They took me down<br><br> (Just so they don't delete me) - What is 2x+2x
ch4aika [34]

Answer:

4x

Step-by-step explanation:

4 0
3 years ago
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