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3 years ago

Solve the system using elimination.

Mathematics

1 answer:

Wewaii [24]3 years ago

4 0

Answer:

The answer is A.

Step-by-step explanation:

A. 3*(-9)= -27, 4*(-9)= -36, -27-(-36)= 9

B. 3*(-27)= -81, 4*(-9)= -36, -81- (-36) = -45

C. 3*3= 9, 4*9= 36, 9-36= -27

D. 3*(-3)= -9, 4*(-6)= -24, -9-(-24)= 15

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The girls in Lana’s troop set a goal to sell 1,000 boxes of cookies this year. There are 13 girls in the troop. At least how man

Yuri [45]

Answer:

77 boxes

Step-by-step explanation:

Take the total number of boxes and divide by the number of girls

1000 boxes / 13 girls

76.92307692

Round up

77 boxes

Check

77*13 = 1001 boxes

3 0

3 years ago

Read 2 more answers

HellpppNeed help please urgent

Novay_Z [31]

Answer:

the answer is 63.59m²

Step-by-step explanation:

$radius = \frac{diameter}{2} \\ = \frac{3}{2} \\ = \frac{9}{2} (since \:1cm = 3m \: so \: 3cm = 9m) \\ = 4.5 \\ area \: of \: circle = \pi {r}^{2} \\ = 3.14 \times (4.5) {}^{2} \\ = 3.14 \times 20.25 \\ = 63.585 {m}^{2}$

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2 years ago

The radius of a sphere is 7 meters what is the circle's area

Pie

★ Given :

$\begin{lgathered}\bullet\:\:\textsf{Radius of circle = \textbf{7 meter}}\end{lgathered}$

$\rule{130}1$

★ Digram :

$\setlength{\unitlength}{1mm}\begin{picture}(50,55)\thicklines\qbezier(25.000,10.000)(33.284,10.000)(39.142,15.858)\qbezier(39.142,15.858)(45.000,21.716)(45.000,30.000)\qbezier(45.000,30.000)(45.000,38.284)(39.142,44.142)\qbezier(39.142,44.142)(33.284,50.000)(25.000,50.000)\qbezier(25.000,50.000)(16.716,50.000)(10.858,44.142)\qbezier(10.858,44.142)( 5.000,38.284)( 5.000,30.000)\qbezier( 5.000,30.000)( 5.000,21.716)(10.858,15.858)\qbezier(10.858,15.858)(16.716,10.000)(25.000,10.000)\put(25,30){\line(5,0){20}}\put(25,30){\circle*{1}}\put(29,26){\sf\large{7 m}}\end{picture}$

$\rule{130}1$

★ Solution :

☯ $\underline{\boldsymbol{According\: to \:the\: Question\:now :}}$

$:\implies\sf Area\:of\:circle = \pi r^2 \\\\\\:\implies\sf Area\:of\:circle = \dfrac{22}{\cancel{7}} \times \cancel{7} \times 7\\\\\\:\implies\sf Area\:of\:circle = 22 \times 7\\\\\\:\implies\sf Area\:of\:circle = 154 m^{2}$

⠀

$\therefore\:\underline{\textsf{Area of circle is \textbf{154}} \:\sf{m^2}}.$

$\rule{170}{2}$

7 0

3 years ago

Ariel uses 7/8 of a cup of vinegar in her salad dressing recipe. How much vinegar would Ariel use to make 1/2 of a recipe? show

never [62]

I’m pretty sure it’s 7/16 Goodluck! :)

4 0

3 years ago

Solve the triangle. A = 54°, b = 11, c = 8

Delicious77 [7]

In this problem, you apply principles in trigonometry. Since it is not mentioned, you will not assume that the triangle is a special triangle such as the right triangle. Hence, you cannot use Pythagorean formulas. The only equations you can use is the Law of Sines and Law of Cosines.

For finding side a, you can answer this easily by the Law of Cosines. The equation is

a2=b2 +c2 -2bccosA
a2 = 11^2 + 8^2 -2(11)(8)(cos54)
a2 = 81.55
a = √81.55
a = 9

Then, we use the Law of Sines to find angles B and C. The formula would be

a/sinA = b/sinB = c/sinC
9/sin54° = 11/sinB
B = 80.4°

9/sin54° = 8/sinC
C = 45.6°

The answer would be: a ≈ 9, C ≈ 45.6, B ≈ 80.4

5 0

3 years ago